Simulator Library
Structural Analysis Simulators
Structural simulators for beams, columns, trusses, plates, shells, buckling, stress, strain, and deflection checks.
147 simulators
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Simulator list
Adhesive Joint Stress Analysis Calculator (Volkersen & Hart-Smith)
Apply Volkersen linear and Hart-Smith elastic-plastic models to compute shear and peel stress in single-lap bonded joints. Parametric study of overlap length and adheren…
Aeroelastic Flutter Speed Calculator — 2DOF Wing Section Analysis
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
Real-time EN 1993-1-1 steel beam-column buckling check. Plot your design point on the P-M interaction diagram for an 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
Analyze a beam pin-supported at both A and B with a free overhang extending past B to D under a UDL and a tip point load. Real-time reactions, peak moments and tip defle…
Beam Shear Stress Distribution Simulator
Beam & Flexural Analysis
Read web shear demand with a section sketch, stress distribution, and utilization map.
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
Visualize the bending of a two-layer strip with the Timoshenko bimetal formula. Adjust the temperature change, length, thickness and expansion mismatch to learn how a te…
Blast Wave Simulator — Sedov-Taylor Scaling & Overpressure
Explore blast wave physics: Sedov-Taylor scaling for radius and Hopkinson-Cranz curves for overpressure. Simulate blast effects on structures.
Bolt Group Eccentric Simulator
Resolve eccentric shear in a bolt group into direct shear, moment-induced force, maximum bolt force, and utilization.
Bolt Thread Root Combined Stress Simulator
Calculate the combined von Mises stress of axial tension and torsion at a bolt thread root during tightening, from ISO thread, property class, preload and friction.
Bolted Connection Strength Calculator
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)
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. Drive a truck across for real-time stress analysis — exceed the limit and watch it collapse. A…
Bridge Deck Aerodynamic Flutter Simulator
A real-time tool to estimate the aerodynamic flutter critical wind speed and vortex-induced vibration lock-in speed of long-span bridge decks.
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
Set end conditions, cross-section, material, and length to instantly compute critical buckling load Pcr. The calculator automatically applies Euler's or Johnson's formul…
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.
Buckling-Restrained Brace Simulator
Beam & Flexural Analysis
Design the buckling-restrained brace (BRB), a brace that cannot buckle.
Cable Sag Calculator
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
Calculate cable tensions and cross-sections for your bridge design instantly. Input span, height, cables, and loads for a detailed, visualized analysis.
Castigliano Theorem Simulator — Deflection via Strain Energy Method
Beam & Flexural Analysis
Uses delta = dU/dP to separate the contributions of a tip point load P and a distributed load w on a cantilever beam. Learn the superposition principle and the fixed-end…
Catenary Cable Tension Calculator
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
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
Design the bearing pressure a steel column base plate delivers to its concrete foundation. Vary the axial load, moment and plate size and watch the eccentricity, the ker…
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
Compute the design lateral pressure P_max that fresh concrete exerts on formwork using ACI 347R-14.
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). The real beam's M/EI diagram is placed as a distributed load on…
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
A real-time tool for evaluating how many container tiers a bay can carry, and how much force the bottom-tier corner castings have to take.
Continuous Three-Span Beam Simulator — Three-Moment Equation
Beam & Flexural Analysis
Analyze an equal-span, uniformly loaded three-span continuous beam with Clapeyron's three-moment equation. Visualize the interior support moment, reaction distribution, …
Continuous Beam Analysis Calculator
Beam & Flexural Analysis
Calculate support moments, reactions, and diagrams for multi-span beams. using the three-moment equation for engineers and students.
Crane Load & Wire Rope Tension Calculator
Calculate crane load, wire rope tension, SWL & breaking strength. Adjust rope falls, sling angle & sheave efficiency with this .
Curved Beam Stress Simulator
Beam & Flexural Analysis
Curved Beam Stress Simulator updates live numeric results and charts as inputs change, supporting early design checks and model review.
Gravity Dam Water Pressure & Stability Calculator — Overturning, Sliding, Base Stress
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
For hard elastic spheres, the DMT model adds the long-range attraction outside the contact area to a Hertzian profile. The pull-off force F_po = -2 pi R gamma is 4/3 tim…
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
Get a feel for the most fundamental building block of the finite element method (FEM): the stiffness matrix of a 1D bar (truss) element, [k]=(EA/L)[[1,-1],[-1,1]].
Euler Buckling Load Calculator
Beam & Flexural Analysis
Change cross-section shape, end conditions, and column length to calculate critical buckling load in real time. Simultaneously visualize buckling mode shape and Pcr–L re…
Explosion Blast Wave Simulator — TNT Equivalence & Overpressure
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 pin-jointed trusses using the Direct Stiffness Method. Select from 5 preset configurations — Pratt, Warren, Cantilever, K-Truss, or Simple Triangle — and instan…
Fixed-End Moment Simulator — Clamped-Clamped Beam FEM Basics
Beam & Flexural Analysis
Apply a point load and a uniformly distributed load to a clamped-clamped beam and read off the fixed-end moments, support reactions and mid-span deflection in real time.…
Flutter Speed Calculator
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
Instantly compute bending stress, deflection and safety factor for the brackets that carry the cab frame of a freight elevator, from rated load, cab mass, support span, …
Hertz Contact Stress Calculator
Contact Stress
Based on Hertz contact theory, compute contact pressure distribution, contact radius, and subsurface maximum shear stress for sphere and cylinder contacts in real time.
Hertz Line Contact Simulator — Two Parallel Cylinders
Contact Stress
Visualize Hertzian line contact between two parallel cylinders. Adjust line load, radii and Young's modulus to see the contact half-width and maximum contact pressure fo…
Influence Line Simulator — Moving Load and the Response Quantity
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. Learn the basics of bridg…
Isoparametric Mapping Simulator — 4-Node Quadrilateral Element
Visualize the isoparametric map from the reference square (xi, eta) in [-1,1]^2 to physical coordinates (x,y) and the Jacobian determinant. Move a corner to see element …
JKR Adhesive Contact Simulator — Johnson-Kendall-Roberts Theory
Contact Stress
Real-time computation of how surface energy γ enlarges the contact radius of soft elastic spheres and creates a pull-off force. Compare with Hertz to see adhesion at a g…
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
A tool that compares the two assumptions used to reduce a 3D elasticity problem to 2D: plane stress and plane strain.
Maxwell-Betti Reciprocal Theorem Simulator
Beam & Flexural Analysis
Verify on a simply supported beam that delta_AB times P_A equals delta_BA times P_B. The symmetry of the influence function C(a,b) is exactly what makes the FEM stiffnes…
Membrane Stress Simulator — Thin Shell Pressure Vessel
Calculate meridional stress σφ and circumferential stress σθ for spherical, cylindrical, and conical shells under internal pressure using the Laplace-Young equation in r…
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
Interactive Mohr's circle tool: enter stress components σx, σy, τxy to visualize principal stresses, maximum shear stress, and principal angle in real time.
Moment-Curvature Simulator
Compute the moment-curvature (M-φ) relationship of a rectangular beam section under bending. Adjust the section size, yield stress and curvature ratio to see the yield m…
Joint Moment Distribution Simulator — Hardy Cross Basics
From the member lengths at a rigid joint, compute the relative stiffness K=1/L and distribution factors DF, then watch how an applied moment M_0 is shared among the thre…
Moment of Inertia Calculator
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
Size mooring lines for FPSOs, TLPs, Spars and offshore buoys using classical catenary theory.
Offshore Structure Wave Force Calculator (Morison Equation)
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 Effect Simulator — Second-Order Effects from Axial Loads
Beam & Flexural Analysis
Real-time second-order analysis of a pin-pin column under combined axial load $P$ and central lateral point load $H$.
Parallel Key Stress Design Simulator
Design the parallel (sunk) key that transmits torque from a shaft to a hub — a gear, pulley or coupling. Change the power, speed and key dimensions to see the shear stre…
Photoelasticity Stress Analysis — Isochromatic Fringe Pattern Visualization
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
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
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
Add pipe segments with DN, schedule, material, and fluid type. Compute total weight, thermal expansion, and view segment-by-segment breakdown.
Piping Thermal Expansion & Stress Calculator
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
A ductile beam does not fail the instant its first section yields. Plastic hinges form one by one, and the structure collapses only when it becomes a mechanism. Change t…
Plastic Section Modulus Simulator
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
The tall, thin web of a plate girder can buckle under shear long before the steel yields.
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. Adjust the column height, beam span, lateral load a…
Powerline Galloping Iced Conductor Stability Simulator
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 Nozzle Reinforcement Calculator — ASME Area Replacement
Calculate nozzle reinforcement requirements for pressure vessel openings using the area replacement method per ASME Section VIII. Check code compliance for nozzle design.
Pressure Vessel Stress Calculator (Thin-Wall, Thick-Wall & Lamé Equations)
Calculate pressure vessel wall stress with Lamé equations. for thin & thick-wall analysis, real-time results, and automatic classification.
Prestressed Concrete Losses Simulator
The force jacked into a prestressing tendon is never fully retained. Elastic shortening, creep, drying shrinkage and steel relaxation slowly take part of it away.
3D Principal Stress Simulator — Eigenvalues of the Stress Tensor
Enter the 3D stress tensor components (sigma_x, sigma_y, sigma_z, tau_xy) with sliders and read off the three principal stresses sigma1>=sigma2>=sigma3, the maximum shea…
Propped Cantilever Beam Simulator — One-Degree Indeterminate Beam
Beam & Flexural Analysis
For a beam fixed at the left and pinned at the right, with UDL and a central point load, this tool visualizes the fixed-end moment, both support reactions, the maximum d…
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
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)
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
Build an intuition for shape functions, the heart of the finite element method.
Shear & Moment Diagram Simulator — Simply Supported Beam Under Combined Loads
Beam & Flexural Analysis
Real-time plotting of reactions, the shear force diagram and the bending moment diagram of a simply supported beam under combined point and distributed loads, with autom…
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
Visualize the shear flow q(s)=VQ(s)/I distribution of a C-channel and the shear-center distance e at which a transverse load produces no twist. Change web height, flange…
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 middle.
Shear Wall Lateral Stiffness Simulator
Calculate the lateral stiffness of a shear wall that resists the horizontal loads from earthquakes and wind.
SIMP Topology Optimization Simulator (2D Finite Element)
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
Solve a two-span indeterminate continuous beam by the slope-deflection (displacement) method.
Cantilever Snap-Fit Design Simulator
Beam & Flexural Analysis
Design the snap-fit hooks that make plastic parts click together. Adjust the beam length, root thickness and undercut to see the peak assembly strain and insertion force…
Greenhouse Snow Load Collapse Assessment Simulator
Evaluate the snow-load collapse risk of single-span pipe houses, Venlo glass greenhouses and multi-span structures.
Snow Loaded Tree Branch Bending Simulator
Beam & Flexural Analysis
Evaluate how a tree branch sags and when it snaps under snow-crown and ice-glaze loading, using a cantilever-beam model. Adjust species, geometry, snow depth, density an…
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 1991-1-3), ASCE 7-22, and Canadian NBCC.
Spline Shaft Stress Simulator
Design the straight-sided spline shafts that carry large torque from a shaft to a hub (gear or coupling). Adjust the power, speed, major and minor diameter, tooth count …
Static Equilibrium
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
Set Warren or Pratt truss panel count, height, and load to automatically calculate all member forces using the method of joints (ΣFx=0, ΣFy=0). Three-tab layout with col…
Steel Connection Design Tool — Bolt & Weld Joint Calculator
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
Calculate strain gauge bridge output voltage and sensitivity. Compare all four Wheatstone bridge configurations with adjustable parameters.
Strain Gauge Rosette Simulator
Solve the complete in-plane strain state from the readings of a three-gauge "rosette".
Stress Concentration Factor Kt Calculator
Compute the stress concentration factor Kt for circular holes, stepped shafts, and notches in real time. Vary geometry parameters and instantly visualize Kt and the stre…
Stress Tensor Visualizer — Principal Stresses & 3D Mohr's Circle
Enter the 6 components of a 3D stress tensor to instantly calculate principal stresses, Von Mises stress, and Tresca stress. Visualize 3D Mohr's circles, stress element …
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.
Structural Reliability Analysis & Probability of Failure Calculator
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
Parabolic cable theory for suspension bridges: real-time computation of H, T_max, sag ratio, cable arc length, and hanger forces. Adjust span, sag, load, and pylon heigh…
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
The slender web of a plate girder buckles in shear at a low stress — but that is not failure. The buckled web keeps carrying load as a diagonal tension band. Vary the we…
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
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)
Apply Bredt-Batho theory to closed (box, circle) and open (C-channel, I-beam) sections. Animated shear flow arrows, max shear stress, twist angle per unit length, and cl…
Three-Hinged Arch Simulator
Beam & Flexural Analysis
Apply a uniformly distributed load and an optional crown point load to a parabolic three-hinged arch and study the vertical reaction and horizontal thrust at its support…
Timber Beam Design Simulator
Beam & Flexural Analysis
Design a simply-supported timber beam under a uniformly distributed load. Adjust the width, depth, span, load and species to see the bending, shear and deflection checks…
Timoshenko Beam Simulator — Tip Deflection with Shear Deformation
Beam & Flexural Analysis
Compare cantilever tip deflection from Euler-Bernoulli and Timoshenko theories. Vary length, depth, load and Young's modulus to see why short, deep beams need shear defo…
Topology Optimization (SIMP Method) Simulator
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
A live moment-balance calculator for the tower cranes that shape every modern city skyline. Slide jib length, counterweight, load radius and wind speed and watch the ove…
2D Truss Analyzer (Direct Stiffness Method / FEM)
Beam & Flexural Analysis
Direct Stiffness Method (FEM) solver for planar trusses. Members color-coded by axial force — tension in red, compression in blue.
Unit Load Method Simulator — Cantilever Beam Deflection and Rotation
Beam & Flexural Analysis
Visualize the tip deflection delta and rotation theta of a cantilever beam with the unit load method (Mohr integral). Change the length, flexural rigidity, point load an…
Unsymmetric Bending Simulator
Beam & Flexural Analysis
Apply a bending moment to a rectangular beam section at an angle offset from its principal axes. Change the load angle and watch the moment split into strong- and weak-a…
Virtual Work — Unit Load Method for Truss Deflection
Beam & Flexural Analysis
Compute the apex deflection of a 3-bar truss in real time with the principle of virtual work. Adjust geometry, load and stiffness to see which member dominates the displ…
Thin-Walled Torsion Simulator
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
An interactive tool for evaluating wave attenuation and mooring design of floating breakwaters used at marinas and aquaculture sites.
Morison Equation Wave Loading on Offshore Structures Simulator
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
Visualize elliptical Hertz contact between a railway wheel and rail head. Change the axle load, wheel radius, rail crown radius and friction coefficient to learn about t…
Building Wind Load Calculator (ASCE 7-16)
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)
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
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
A real-time design tool for stress-graded wood roof trusses. Following JIS Z 2101 E-F grading and the Japanese Building Standards Law allowable-stress approach, it retur…
Yield Line Theory Simulator — Ultimate Load of a Rectangular Slab
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.
How to Use
- Select structural element type (beam, column, truss, or plate) from the category filter dropdown
- Input material properties: Young's modulus (e.g., 210 GPa for steel), Poisson's ratio, and yield strength
- Define geometry: cross-sectional dimensions, length, and boundary conditions (fixed, pinned, free)
- Apply loads: point forces, distributed loads, or moments with magnitude and direction
- Run analysis to compute stress, strain, deflection, and buckling load factors
- Review contour plots and numerical results for critical locations
Worked Example
Steel cantilever beam (E=210 GPa, L=3m, rectangular section 100×50 mm) with 5 kN downward point load at free end. Computed maximum deflection δ=8.4 mm at tip, maximum bending stress σ=120 MPa at fixed support, safety factor against yield (σ_yield=250 MPa for mild steel) = 2.08. Critical buckling load for lateral-torsional buckling determined as 45 kN using eigenvalue analysis.
Practical Notes
- For composite columns, input effective length factor K based on end conditions: K=0.5 (fixed-fixed), K=1.0 (pinned-pinned), K=2.0 (cantilever)
- Truss analysis assumes rigid joints; verify pin-jointed assumptions for real structures
- Plate analysis defaults to thin-plate theory (thickness < 1/10 span); switch to thick-plate formulation for thicker geometries
- Always apply load factors per code (1.35 dead load + 1.5 live load for Eurocode 2) before reporting final results