Structural Analysis Simulators

Adhesive Joint Stress Analysis Calculator (Volkersen & Hart-Smith)

Connections & Joints

Analyze shear & peel stress in bonded lap joints using Volkersen & Hart-Smith models. Calculate stress concentration, plastic flow, and failure load estimates for adhesive joints.

Aeroelastic Flutter Speed Calculator — 2DOF Wing Section Analysis

Loads & Hazards

Calculate flutter and divergence speeds for a 2-DOF wing section in real time. Explore V-g and V-omega diagrams with interactive animations.

Arch Structure & Thrust Line Calculator

Beam & Flexural Analysis

Calculate horizontal thrust and reactions for three-hinged arches. View real-time thrust line and force diagrams with this structural analysis tool.

Beam-Column Buckling & P-M Interaction Diagram

Beam & Flexural Analysis

EN 1993-1-1 beam-column buckling & P-M interaction simulator. Plot the design point on the P-M envelope in real time for instant PASS/FAIL verification.

Beam Deflection & Stress Analysis Tool

Beam & Flexural Analysis

Real-time beam deflection, bending moment, and shear force calculator. Supports simply supported and cantilever beams with point loads and uniform distributed loads.

Overhanging Beam Simulator — Reactions, SFD, BMD & Tip Deflection

Beam & Flexural Analysis

Compute reactions, peak bending moment and tip deflection of an overhanging beam in real time. Vary main-span length, overhang, UDL and tip load to learn SFD and BMD behavior.

Beam Shear Stress Distribution Simulator

Beam & Flexural Analysis

Evaluate maximum shear stress, section distribution, and utilization from beam shear force, web dimensions, and shape factor.

Beam Cross-Section Properties Visualizer — Second Moment of Area, Section Modulus

Beam & Flexural Analysis

Visualize beam cross-section properties instantly. Adjust dimensions with sliders to see Ix, Iy, Zx, Zy, radius of gyration, and bending stress distribution.

Bimetal Thermostat Simulator — Thermal Bending of a Two-Layer Strip

Beam & Flexural Analysis

Bimetal thermostat simulator using Timoshenko formula to model thermal bending of two-layer strips. Explore temperature response and expansion mismatch.

Blast Wave Simulator — Sedov-Taylor Scaling & Overpressure

Loads & Hazards

Explore blast wave physics: Sedov-Taylor scaling for radius and Hopkinson-Cranz curves for overpressure. Simulate blast effects on structures.

Bolt Group Eccentric Simulator

Connections & Joints

Bolt Group Eccentric Simulator: analyze eccentric shear loads, calculate direct shear, moment forces, and bolt utilization in structural connections.

Bolt Thread Root Combined Stress Simulator

Connections & Joints

Simulate combined stress at bolt thread roots under preload and torque. Analyze proof strength limits with real-time stress calculations for threaded fastener design.'t yield.

Bolted Connection Strength Calculator

Connections & Joints

Calculate bolt stress, safety factor & allowable load instantly. Enter bolt diameter, grade, quantity & applied loads for your CAE design verification.

Bolted Flange Joint Calculator (ASME, Gasket Seating, Leakage Check)

Connections & Joints

Design bolted pipe flanges per ASME Sec.VIII. Calculate bolt load for gasket seating, operating conditions, leakage margin, and bolt stress.

Bridge Truss Design Simulator — Build, Break & Learn Structural Mechanics

Beam & Flexural Analysis

Place nodes and connect them with members to design your own truss bridge.

Bridge Deck Aerodynamic Flutter Simulator

Cables & Bridges

Bridge Deck Aerodynamic Flutter Simulator: A real-time tool to estimate the aerodynamic flutter critical wind speed and vortex-induced vibration lock-in spee…

Bridge Truss FEM Analysis Simulator

Beam & Flexural Analysis

Analyze Pratt, Warren & Howe bridge trusses with FEM. See animated members light up red for tension or blue for compression under applied loads.

Column Buckling Calculator — Euler Load, Johnson Formula & Slenderness Ratio

Beam & Flexural Analysis

Calculate critical buckling load instantly. Set end conditions, material, and geometry. Uses Euler and Johnson formulas for long & intermediate columns with safety factor.

Column Buckling Mode Shape Visualizer

Beam & Flexural Analysis

Visualize column buckling modes with animations. Calculate critical load, slenderness ratio, and effective length for various end conditions instantly.

Thin Plate Buckling Calculator

Thin-Walled & Shell Structures

Calculate critical buckling load for thin plates. Adjust aspect ratio, material, boundary conditions, and loading. Instant results with key formulas.

Buckling-Restrained Brace Simulator

Beam & Flexural Analysis

Design the buckling-restrained brace (BRB), a brace that cannot buckle.

Catenary Cable Calculator

Cables & Bridges

Calculate catenary cable sag, maximum tension, arc length, and thermal elongation in real time. Ideal for power line, suspension bridge, and ropeway design u

Cable Sag Calculator

Cables & Bridges

Calculate cable sag, tension, and length for any span. Visualize the exact catenary curve and its parabolic approximation instantly with this free engineering tool.

Cable-Stayed Bridge Tension Calculator — Structural Design Tool

Cables & Bridges

Calculate cable tensions and cross-sections for your bridge design instantly. Input span, height, cables, and loads for a detailed, visualized analysis.

Cable-Stayed Bridge Stay Tension Simulator

Cables & Bridges

Cable-Stayed Bridge Stay Tension Simulator focuses on nearby design assumptions and key metrics, giving a compact read on the current case and the trend that matters nex…

Castigliano Theorem Simulator — Deflection via Strain Energy Method

Beam & Flexural Analysis

Castigliano Theorem Simulator for cantilever beam deflection using strain energy method. Calculate tip load and distributed load effects with superposition principle.

Catenary Cable Tension Calculator

Cables & Bridges

Calculate cable tension, length, and stress for catenary or parabolic approximations. Enter span, sag, and weight to get precise engineering results.

Centrifuge Rotor Stress Analyzer — Radial & Hoop Stress in Rotating Disks

Stress Analysis Fundamentals

Analyze centrifuge rotor stress profiles in real time. Adjust radius, speed, and material to visualize radial & hoop stress and calculate burst safety margins.

Sandwich Panel Analysis (Equivalent Stiffness, Core Shear, Failure Modes)

Beam & Flexural Analysis

Calculate sandwich panel bending stiffness, core shear, and failure modes. Use real-time formulas for stress, deflection, and face wrinkling limits.

Column Base Plate Bearing Pressure Simulator

Connections & Joints

Column Base Plate Bearing Pressure Simulator: Design the bearing pressure a steel column base plate delivers to its concrete foundation. Vary the axial load,…

Advanced Column Buckling Analysis (Imperfections, P-δ Curve)

Beam & Flexural Analysis

Analyze column buckling with cross-section, end conditions, and load eccentricity. Compute Euler load, slenderness, and P-δ curve with deformation visualization.

Column Design Calculator (Steel / Concrete / Timber)

Beam & Flexural Analysis

Calculate column capacity instantly. Input load, length, material, and dimensions to get slenderness ratio, compressive strength, and utilization.

RC Column P-M Interaction Diagram Calculator — ACI 318

Beam & Flexural Analysis

Calculate ACI 318 P-M interaction diagrams for rectangular RC columns in real time. Adjust dimensions, materials, and reinforcement.

Combined Axial + Bending Stress Calculator

Beam & Flexural Analysis

Calculate combined axial and bending stress for rectangular or circular sections. Visualize stress distribution, find the neutral axis, and compute safety factors.

Composite Beam & Transformed Section Stress Calculator

Beam & Flexural Analysis

Analyze composite beams (bimetal, RC, FRP-steel) in real-time. Visualize stress, neutral axis, and calculate section properties instantly.

Sandwich Panel Structural Analysis — Bending Stiffness, Deflection & Stress

Beam & Flexural Analysis

Analyze sandwich panel bending, stress, and deflection. Input face sheet and core materials for instant structural calculations and performance results.

RC Beam Section Design Calculator (ACI 318)

Beam & Flexural Analysis

ACI 318 design calculator for concrete beams. Input dimensions & material strengths to instantly compute flexural capacity, shear strength, and reinforcement ratios.

Concrete Formwork Lateral Pressure ACI 347 Simulator

Loads & Hazards

Concrete Formwork Lateral Pressure ACI 347 Simulator: Compute the design lateral pressure P_max that fresh concrete exerts on formwork using ACI 347R-14. Adj…

Conjugate Beam Method Simulator

Beam & Flexural Analysis

Find the slope and deflection of a simply-supported beam with the conjugate beam method (Mohr's theorem).

Elliptical Hertz Contact Simulator — General Hertzian Contact

Contact Stress

Compute the elliptical contact patch of general Hertzian contact: major semi-axis a, minor semi-axis b and peak pressure p_max from normal load and principal curvatures.

Hertz Contact Mechanics Calculator — Contact Radius, Pressure & Deflection

Contact Stress

Calculate Hertz contact pressure, radius, and deflection for spheres, cylinders, or flat geometries. Input materials and load for instant results.

Container Ship Stacking Load Simulator

Loads & Hazards

Container Ship Stacking Load Simulator: A real-time tool for evaluating how many container tiers a bay can carry, and how much force the bottom-tier corner c…

Continuous Three-Span Beam Simulator — Three-Moment Equation

Beam & Flexural Analysis

Continuous three-span beam simulator: real-time interior support moment, reactions and max deflection of an equal-span uniformly loaded beam via Clapeyron's three-moment equation.

Continuous Beam Analysis Calculator

Beam & Flexural Analysis

Calculate support moments, reactions, and diagrams for multi-span beams. Free online tool using the three-moment equation for engineers and students.

Crane Load & Wire Rope Tension Calculator

Loads & Hazards

Calculate crane load, wire rope tension, SWL & breaking strength. Adjust rope falls, sling angle & sheave efficiency with this free online calculator.

Curved Beam Stress Simulator

Beam & Flexural Analysis

Curved beam stress simulator for bending moment analysis. Calculate inner and outer stress with radius, thickness, width parameters for structural engineering.

Gravity Dam Water Pressure & Stability Calculator — Overturning, Sliding, Base Stress

Loads & Hazards

Calculate dam stability instantly. Adjust height, width, water depth & drainage to get safety factors against overturning, sliding, and base pressure.

DMT Adhesive Contact Simulator — Derjaguin-Muller-Toporov Theory

Contact Stress

DMT Adhesive Contact Simulator for hard elastic spheres: predict pull-off force and contact area using Derjaguin-Muller-Toporov theory and Tabor parameter validation.

Column Effective Length Simulator — Support Conditions and Buckling Load

Beam & Flexural Analysis

Compute the column effective length factor K, effective length KL, Euler buckling load Pcr and slenderness ratio for each end support condition with live charts.

Element Stiffness Matrix Simulator — 1D Bar Element

FEM & Optimization

Visualize the 1D bar element stiffness matrix [k]=(EA/L)[[1,-1],[-1,1]], the starting point of the finite element method. Vary Young's modulus, area, length and axial force to compute element stiffness, global stiffness, nodal displacement and axial stress in real time. Free FEM learning tool.

Column Buckling Load Calculator

Beam & Flexural Analysis

Choose end conditions and cross-section geometry, then compute Euler or Johnson critical load, slenderness ratio, and safety factor with live buckled-shape visualization.

Plate Buckling Analysis

Thin-Walled & Shell Structures

Plate buckling simulator. Calculate critical stress and k-factor for SSSS/SSCC/CCCC boundaries in real time, adjust aspect ratio and visualize buckled modes.

Euler Buckling Load Calculator

Beam & Flexural Analysis

Calculate Euler critical buckling load in real time. Vary cross-section shape, end conditions, and column length to instantly visualize critical load and buckling mode shapes.

Explosion Blast Wave Simulator — TNT Equivalence & Overpressure

Loads & Hazards

Set TNT equivalent charge weight W and standoff distance R to calculate peak overpressure, shock wave velocity, positive phase duration, and specific impulse in real tim…

Plane Truss FEM Solver

Beam & Flexural Analysis

Solve 2D trusses with the Direct Stiffness Method. Choose from 5 preset configurations, assemble matrices, and solve K*u=f. Learn element stiffness with direction cosines.

Fixed-End Moment Simulator — Clamped-Clamped Beam FEM Basics

Beam & Flexural Analysis

Simulate fixed-end moments on clamped-clamped beams with point and distributed loads. Learn FEM basics, support reactions, and deflection analysis.

Flutter Speed Calculator

Loads & Hazards

Analyze 2-DOF airfoil flutter with a V-g diagram. Adjust structural parameters for plunge and pitch to visualize critical speed and damping.

Plane Frame Analysis

Beam & Flexural Analysis

Analyze portal frames with the direct stiffness method. See real-time deformed shapes, bending moment diagrams, and member forces including lateral sway effects.

Freight Elevator Cab Bracket Stress Simulator

Beam & Flexural Analysis

Freight Elevator Cab Bracket Stress Simulator: Instantly compute bending stress, deflection and safety factor for the brackets that carry the cab frame of a …

Hertz Contact Stress Calculator

Contact Stress

Interactive Hertz contact stress calculator for sphere-sphere, sphere-flat, and cylinder contacts. Visualize contact pressure distribution and subsurface stress in real time.

Hertz Line Contact Simulator — Two Parallel Cylinders

Contact Stress

Hertz Line Contact Simulator for parallel cylinders: analyze contact pressure and half-width in roller bearings, cams, gears. Adjust load, radii, modulus.

Influence Line Simulator — Moving Load and the Response Quantity

Structural Analysis & Plastic Design

Draws the "influence line" in real time, showing how the reaction, shear force, and bending moment change as a unit load moves across the beam.

Isoparametric Mapping Simulator — 4-Node Quadrilateral Element

FEM & Optimization

Isoparametric Mapping Simulator for 4-node quad elements. Visualize reference-to-physical coordinate transformation and Jacobian determinant. FEM distortion analysis.

JKR Adhesive Contact Simulator — Johnson-Kendall-Roberts Theory

Contact Stress

JKR (Johnson-Kendall-Roberts) adhesive contact simulator for soft elastic spheres. Real-time contact radius and pull-off force from surface energy, modulus, radius and load.

Lateral-Torsional Buckling Simulator

Beam & Flexural Analysis

Analyse how a steel I-beam bent about its strong axis can swing sideways and twist — lateral-torsional buckling — before reaching its full bending strength.

2D Linear Elasticity Simulator — Plane Stress vs Plane Strain

Stress Analysis Fundamentals

2D Linear Elasticity Simulator — Plane Stress vs Plane Strain: A tool that compares the two assumptions used to reduce a 3D elasticity problem to 2D: plane s…'s modulus, Poisson's ratio and the in-plane stresses σx, σy, τxy to get the normal and shear strains, out-of-plane component, von Mises stress and Mohr's circle for plane stress and plane strain.

Maxwell-Betti Reciprocal Theorem Simulator

Beam & Flexural Analysis

Maxwell-Betti reciprocal theorem simulator for FEM stiffness matrix symmetry verification in beam analysis and influence functions.

Membrane Stress Simulator — Thin Shell Pressure Vessel

Stress Analysis Fundamentals

Calculate meridional and circumferential membrane stress for pressure vessels using Laplace-Young equation. Design analysis for spherical, cylindrical, conical shells.'s equation. Vary wall thickness, inner diameter, and internal pressure to visualize Von Mises stress and safety factor. Useful for pressure vessel and tank design.

Membrane Structure Prestress Analysis

Beam & Flexural Analysis

Analyze membrane structure prestress. Input span, pretension, camber, and loads to compute stress, deflection, safety factor, and stability for PTFE/ETFE designs.

Structural Mode Shape Visualizer — Beam & Plate Vibration Modes

Beam & Flexural Analysis

Visualize and animate vibration mode shapes for beams and plates in real time. Calculate natural frequencies instantly for structural analysis.

Mohr's Circle Stress Analysis Tool

Stress Analysis Fundamentals

Enter stress components σx, σy, and τxy to draw Mohr's circle in real time.

Moment-Curvature Simulator

Structural Analysis & Plastic Design

Compute moment-curvature relationships for beam sections. Analyze yield moment, plastic moment, and stress distribution in real-time bending analysis.'s modulus, yield stress and curvature ratio to see the yield moment, plastic moment, shape factor and bending-stress distribution in real time.

Joint Moment Distribution Simulator — Hardy Cross Basics

Structural Analysis & Plastic Design

Joint Moment Distribution Simulator for Hardy Cross method. Calculate stiffness ratios, distribution factors, and moment equilibrium at rigid joints. Structural analysis tool.

Moment of Inertia Calculator

Stress Analysis Fundamentals

Calculate moment of inertia (Ixx, Iyy), section modulus, and radius of gyration for 7 shapes. Includes parallel axis theorem for beams and structural sections.

Marine Mooring Line Tension & Catenary Simulator

Cables & Bridges

Size mooring lines for FPSOs, TLPs, Spars and offshore buoys using classical catenary theory.

Offshore Structure Wave Force Calculator (Morison Equation)

Loads & Hazards

Calculate wave & current forces on offshore structures in real-time. Visualize Airy wave fields, compute overturning moments & KC numbers for inertia/drag analysis.

P-Delta Amplification Simulator

Structural Analysis & Plastic Design

Use this page to relate representative assumptions to nearby design assumptions and key metrics before moving into the adjacent engineering checks.

P-Delta Effect Simulator — Second-Order Effects from Axial Loads

Beam & Flexural Analysis

P-Delta effect simulator: real-time computation of Euler buckling load P_cr, axial ratio r, amplification factor psi=1/(1-r), and second-order moment M2 for a pin-pin column.

Parallel Key Stress Design Simulator

Connections & Joints

Parallel key stress design simulator for shaft-hub torque transmission. Calculate shear stress, bearing pressure, and safety factors in real time.'t fail.

Photoelasticity Stress Analysis — Isochromatic Fringe Pattern Visualization

Stress Analysis Fundamentals

Visualize isochromatic fringe patterns for stress analysis. Change geometry, load, and material to see principal stress differences in real-time.

Pipe Thermal Expansion & Stress Analysis — ASME B31.3

Pressure Vessels & Piping

Calculate pipe thermal expansion, stress, and anchor forces for steel piping. Instantly compare results to ASME B31.3 allowable stress range.

Pipe Thermal Stress Calculator

Pressure Vessels & Piping

Calculate thermal expansion force and stress instantly for pipes. Input temperature, material, and size for ASME B31.3 compliant results.

Piping Weight & Thermal Expansion Calculator

Pressure Vessels & Piping

Piping weight and thermal expansion calculator for engineers. Compute pipe loads, DN schedules, material properties, and thermal growth analysis with segment breakdown.

Piping Thermal Expansion & Stress Calculator

Pressure Vessels & Piping

Calculate pipe thermal expansion stress & loop sizing per ASME B31.3. Input geometry, view stress vs. allowable limit, and ensure safe design.

Plastic Hinge Collapse Load Simulator

Structural Analysis & Plastic Design

Plastic Hinge Collapse Load Simulator: A ductile beam does not fail the instant its first section yields. Plastic hinges form one by one, and the structure c…

Plastic Section Modulus Simulator

Structural Analysis & Plastic Design

Explore how much reserve a beam section keeps between "the instant it first yields" and "the instant the whole section yields into a plastic hinge".

Plate Buckling & Critical Stress Calculator

Beam & Flexural Analysis

Calculate critical buckling stress for plates with real-time visualization. Set geometry, material, boundary conditions, and load type.

Plate Girder Web Shear Buckling Simulator

Beam & Flexural Analysis

Plate Girder Web Shear Buckling Simulator: The tall, thin web of a plate girder can buckle under shear long before the steel yields. Adjust the web depth, th…

Portal Frame Analysis Simulator

Beam & Flexural Analysis

Solve a single-bay, single-storey rigid frame (portal frame) under a lateral load with the approximate portal method.

Powerline Galloping Iced Conductor Stability Simulator

Cables & Bridges

Evaluate the low-frequency, large-amplitude self-excited "galloping" vibration that develops on iced overhead conductors under crosswind, using the Den Hartog criterion …

Pressure Vessel Design Calculator

Pressure Vessels & Piping

Calculate stress & safety for cylindrical & spherical pressure vessels. Use thin-wall or Lamé thick-wall analysis for hoop, axial, von Mises stress & ASME factor.

Pressure Vessel Nozzle Reinforcement Calculator — ASME Area Replacement

Pressure Vessels & Piping

Calculate required reinforcement area and available reinforcement area in real time per ASME VIII Div.1 UG-37 with pass/fail determination.

Pressure Vessel Stress Calculator (Thin-Wall, Thick-Wall & Lamé Equations)

Pressure Vessels & Piping

Calculate pressure vessel wall stress with Lamé equations. Free online tool for thin & thick-wall analysis, real-time results, and automatic classification.

Prestressed Concrete Losses Simulator

Reinforced & Prestressed Concrete

Prestressed Concrete Losses Simulator: The force jacked into a prestressing tendon is never fully retained. Elastic shortening, creep, drying shrinkage and s…

3D Principal Stress Simulator — Eigenvalues of the Stress Tensor

Stress Analysis Fundamentals

Interactive 3D principal stress simulator solving eigenvalues of stress tensors in real time. Calculate principal stresses, shear stress, and Mohr circles for engineering analysis.

Propped Cantilever Beam Simulator — One-Degree Indeterminate Beam

Beam & Flexural Analysis

Propped cantilever beam simulator for statically indeterminate analysis: visualize reactions, bending moment, shear force, and deflection under combined loads.

Punching Shear Simulator

Beam & Flexural Analysis

A tool for checking the punching shear that develops at the connection of a flat slab supported directly on columns.

Railroad CWR Track Buckling (Sun Kink) Simulator

Beam & Flexural Analysis

Real-time evaluation of "sun kink" — the lateral buckling that can hit continuously welded rail (CWR) on hot summer days.

Rebar Development Length Simulator

Reinforced & Prestressed Concrete

Design the development (anchorage) length a tension reinforcing bar needs so it can reach its yield strength without pulling out of the concrete.

Reinforced Concrete Section Analysis (Flexure & Shear)

Reinforced & Prestressed Concrete

Perform ACI 318 Whitney stress block analysis for RC beams. Calculate φMn, neutral axis depth, strain, and steel checks in real time.

Circular Ring & Arch Structure Calculator

Beam & Flexural Analysis

Calculate bending moments, stresses, and deflections for circular rings and arches under diametral loads or internal pressure. Real-time structural analysis tool.

Rolling Contact Stress Calculator — Hertz Contact Theory & Subsurface Stress

Contact Stress

Calculate rolling contact stress using Hertz theory. Input geometry, materials, and load to get contact radius, peak pressure, and subsurface shear stress.

Sandwich Panel Bending Calculator

Beam & Flexural Analysis

Calculate sandwich panel bending, stress, deflection & buckling in real-time. Ideal for engineers designing with composite or structural panels.

Sandwich Panel Bending Stiffness Calculator

Beam & Flexural Analysis

Calculate sandwich panel bending stiffness instantly. Select face sheet & core materials, adjust thicknesses, and get flexural rigidity (D) and deflection.

1D FEM Shape Functions Simulator

FEM & Optimization

1D FEM Shape Functions Simulator: Build an intuition for shape functions, the heart of the finite element method. Switch between linear 2-node and quadratic …

Shear & Moment Diagram Simulator — Simply Supported Beam Under Combined Loads

Beam & Flexural Analysis

Simulate shear and moment diagrams for simply supported beams with combined loads. Real-time plotting, reaction calculations, and maximum moment detection.

Shear Center Calculator — Thin-Walled Section Shear Flow Visualizer

Beam & Flexural Analysis

Calculate shear center for Channel, Z, T, Angle, and I-beam sections. Visualize shear flow distribution and key section properties in real time.

Shear Flow and Shear Center of a Thin-Walled Open Section — C-Channel

Thin-Walled & Shell Structures

Compute the shear flow q(s)=VQ(s)/I distribution of a C-channel and the shear-center distance e in real time. Visualize why the no-twist load point lies outside the section.

Box Girder Shear Lag Simulator

Thin-Walled & Shell Structures

Box Girder Shear Lag Simulator: In the wide top and bottom flanges of a box girder, the bending stress concentrates next to the webs and "lags" toward the mi…

Shear Wall Lateral Stiffness Simulator

Structural Analysis & Plastic Design

Shear Wall Lateral Stiffness Simulator: Calculate the lateral stiffness of a shear wall that resists the horizontal loads from earthquakes and wind. Adjust t…

SIMP Topology Optimization Simulator (2D Finite Element)

FEM & Optimization

Real-time 2D topology optimization in your browser. Adjust loads, supports, and constraints to explore SIMP method designs instantly.

Slope-Deflection Method Simulator

Beam & Flexural Analysis

Slope-Deflection Method Simulator: Solve a two-span indeterminate continuous beam by the slope-deflection (displacement) method. Adjust the span lengths, fle…

Cantilever Snap-Fit Design Simulator

Beam & Flexural Analysis

Design the snap-fit hooks that make plastic parts click together.

Greenhouse Snow Load Collapse Assessment Simulator

Loads & Hazards

Greenhouse Snow Load Collapse Assessment Simulator: Evaluate the snow-load collapse risk of single-span pipe houses, Venlo glass greenhouses and multi-span s…

Snow Loaded Tree Branch Bending Simulator

Beam & Flexural Analysis

Snow Loaded Tree Branch Bending Simulator: Evaluate how a tree branch sags and when it snaps under snow-crown and ice-glaze loading, using a cantilever-beam …

Roof Snow Load Building Code Simulator

Loads & Hazards

Roof Snow Load Building Code Simulator: Compute the design snow load on a roof using four major codes: the Japanese Building Standards Law, Eurocode 1 (EN 19…

Spline Shaft Stress Simulator

Connections & Joints

Design the straight-sided spline shafts that carry large torque from a shaft to a hub (gear or coupling).

Static Equilibrium

Stress Analysis Fundamentals

Calculate static equilibrium for 2D rigid bodies. Set supports and loads to auto-solve reactions and view a real-time free body diagram.

Static Truss Analyzer — 2D Method of Joints & Member Forces

Beam & Flexural Analysis

Statics Truss Analyzer (Method of Joints): Set Warren or Pratt truss panel count, height, and load to automatically calculate all member forces using the met…

Steel Connection Design Tool — Bolt & Weld Joint Calculator

Connections & Joints

Calculate bolt slip capacity and weld strength in real time. Visualize bolt patterns and identify the governing failure mode with this steel connection design tool.

Strain Gauge Bridge Calculator — Output Voltage & Temperature Error

Stress Analysis Fundamentals

Calculate strain gauge bridge output voltage and sensitivity. Compare all four Wheatstone bridge configurations with adjustable parameters.

Strain Gauge Rosette Simulator

Stress Analysis Fundamentals

Strain Gauge Rosette Simulator: Calculate in-plane strain state, principal strains, and stresses from three-gauge rosette readings with real-time Mohr's circle analysis.'s-law principal stresses, with a Mohr's circle of strain.

Stress Concentration Factor Kt Calculator

Stress Analysis Fundamentals

Calculate stress concentration factor Kt for holes, shafts & notches in real time. Free online calculator with instant visualization.

Stress Tensor Visualizer — Principal Stresses & 3D Mohr's Circle

Stress Analysis Fundamentals

Input 6 components of a 3D stress tensor and instantly compute & plot principal stresses, Von Mises stress, Tresca stress, and 3D Mohr's circles. A free CAE tool for comparing yield criteria and visualizing stress states.

Structural Fire Design Simulator (Eurocode EN 1992-1-2)

Beam & Flexural Analysis

Simulate concrete beam fire resistance per Eurocode EN 1992-1-2. Calculate 500°C isotherm penetration, effective width, and residual load capacity under ISO 834 fire.

SIMP Topology Optimization Simulator

FEM & Optimization

Optimize material density in real-time with the SIMP Topology Simulator. Adjust parameters to evolve the stiffest structure using the penalty law and compliance gradient.

Structural Reliability Analysis & Probability of Failure Calculator

Structural Analysis & Plastic Design

Compute reliability index β & failure probability Pf via FORM or Monte Carlo simulation. Visualize R-S interference & required mean resistance for target reliability.

Strut-and-Tie Model — Rigid-Plastic Analysis of D-Regions

Beam & Flexural Analysis

The strut-and-tie model simulator represents the force flow in corbel D-regions with a simple truss of struts and ties and computes member forces from nodal equilibrium.

Hertz Subsurface Stress Simulator — σz, σr and τmax versus Depth

Contact Stress

Hertz subsurface stress simulator. Compute centerline σz, σr and τmax under a Hertzian sphere contact in real time; peak shear at z≈0.48a is the pitting origin.

Beam Deflection by Superposition Calculator

Beam & Flexural Analysis

Calculate beam deflection with up to 3 loads using superposition. Get deflection curves for simply-supported beams with forces, moments, or distributed loads.

Suspension Bridge & Cable-Stayed Bridge Cable Shape Calculator

Cables & Bridges

Calculate horizontal tension, max cable tension, sag ratio & more for suspension & cable-stayed bridges using parabolic cable theory. Free online engineering tool.

T-Beam Section Simulator — Properties & Bending Stress

Beam & Flexural Analysis

T-beam section simulator: computes centroid, moment of inertia, section modulus, plastic section modulus and shape factor of a T-shape, with bending stress visualization.

Tension Field Action Simulator

Beam & Flexural Analysis

Tension Field Action Simulator: The slender web of a plate girder buckles in shear at a low stress — but that is not failure. The buckled web keeps carrying …

Thermal Stress & Bimetal Warpage Calculator

Beam & Flexural Analysis

Calculate thermal expansion, bimetal bending & interface stress with this interactive Timoshenko theory calculator for electronics & solder joints.

Thin-Wall Pressure Vessel Stress Calculator — Hoop Stress & Von Mises

Thin-Walled & Shell Structures

Calculate stress and safety factors for thin-wall pressure vessels. Get hoop, axial, and Von Mises stress instantly for cylindrical or spherical designs.

Thin-Walled Open Section Properties Calculator — C/Z/L/I Beam

Beam & Flexural Analysis

Calculate thin-walled open section properties for C-channel, Z, L-angle, and I-beam profiles, including shear center and warping constant.

Thin-Walled Section Shear Flow & Torsion Calculator (Bredt-Batho)

Thin-Walled & Shell Structures

Calculate shear flow, stress, and twist for thin-walled sections. Apply Bredt-Batho theory to closed (box, circle) and open (C, I-beam) profiles with formulas and animations.

Three-Hinged Arch Simulator

Beam & Flexural Analysis

Three-Hinged Arch Simulator: Apply a uniformly distributed load and an optional crown point load to a parabolic three-hinged arch and study the vertical reac…

Timber Beam Design Simulator

Beam & Flexural Analysis

Timber Beam Design Simulator: Design a simply-supported timber beam under a uniformly distributed load. Adjust the width, depth, span, load and species to se…

Timoshenko Beam Simulator — Tip Deflection with Shear Deformation

Beam & Flexural Analysis

Timoshenko beam simulator for cantilever tip deflection analysis. Compare shear deformation effects versus classical theory for short, thick beams.

Topology Optimization (SIMP Method) Simulator

FEM & Optimization

Optimize material layout with the SIMP method. Set parameters, apply loads, and simulate to find the stiffest structure by minimizing compliance.

Tower Crane Counter-Jib Balance Simulator

Loads & Hazards

Tower Crane Counter-Jib Balance Simulator: A live moment-balance calculator for the tower cranes that shape every modern city skyline. Slide jib length, coun…

2D Truss Analyzer (Direct Stiffness Method / FEM)

Beam & Flexural Analysis

Analyze planar trusses with the Direct Stiffness Method. This FEM solver calculates axial forces, color-coding tension (red) and compression (blue) for clear visualization.

Unit Load Method Simulator — Cantilever Beam Deflection and Rotation

Beam & Flexural Analysis

Unit Load Method Simulator for cantilever beam deflection and rotation analysis using Mohr integral and virtual work calculations.

Unsymmetric Bending Simulator

Beam & Flexural Analysis

Apply a bending moment to a rectangular beam section at an angle offset from its principal axes.

Virtual Work — Unit Load Method for Truss Deflection

Beam & Flexural Analysis

The virtual work simulator computes truss apex deflection by the unit load method delta=sum N n L/(EA), showing member real and virtual forces and each member's contribution.

Thin-Walled Torsion Simulator

Thin-Walled & Shell Structures

Analyse the same thin-walled square tube two ways — as a closed section (an intact tube) and as an open section (the same tube with a longitudinal slit).

Floating Breakwater Wave Load Simulator

Loads & Hazards

Floating Breakwater Wave Load Simulator: An interactive tool for evaluating wave attenuation and mooring design of floating breakwaters used at marinas and a…

Morison Equation Wave Loading on Offshore Structures Simulator

Loads & Hazards

A real-time Morison-equation calculator for the wave loads on slender offshore members — jacket platform legs, conductors, risers and offshore wind monopiles.

Wheel-Rail Contact Simulator — Elliptical Hertz Contact and Adhesion Limit

Contact Stress

Wheel-rail contact simulator for Hertz elliptical contact analysis. Adjust load, radius, friction to calculate contact pressure and adhesion limits.

Building Wind Load Calculator (ASCE 7-16)

Loads & Hazards

Calculate ASCE 7-16 wind loads instantly. Enter building dimensions, exposure, and wind speed for velocity pressure (qz) and design pressure (p).

Wind Load Calculator (ASCE7 & Building Code)

Loads & Hazards

Calculate wind pressure, shear, and moment per ASCE 7. Input speed, dimensions, and terrain for instant structural load results and visualizations.

Wind Pressure & Wind Load Calculator — Building Structures & CFD Design

Loads & Hazards

Wind pressure & wind load calculator. Compute height-wise pressure from design wind speed, exposure and shape in real time, with base shear and overturning moment.

Wood Truss Stress-Graded Design Simulator

Beam & Flexural Analysis

Wood Truss Stress-Graded Design Simulator: A real-time design tool for stress-graded wood roof trusses. Following JIS Z 2101 E-F grading and the Japanese Bui…

Yield Line Theory Simulator — Ultimate Load of a Rectangular Slab

Structural Analysis & Plastic Design

The yield line theory simulator computes the ultimate distributed load of a four-edge simply supported rectangular RC slab from yield moment and aspect ratio.