Draw a metal shape on a grid, apply loads from the top and bottom, and visualize the stress distribution in shades of red
Drag on the canvas to draw any shape you like. Changing the shape resets the deformation.
Trace the grid on the canvas with your finger or mouse to fill metal cells. Switch to the eraser to carve them away. Starting from the beam, L-shape, or plate-with-hole preset and carving from there is also convenient. The moment you change the shape, the deformation is reset and the simulation restarts with the new shape.
Loads are applied to the point masses on the top and bottom surfaces of the shape. Compression pushes from above and below, while tension pulls the shape apart vertically. Turning on "Fix the bottom edge" pins the grounded point masses so the behavior resembles pressing with a press machine. With it off, the shape rests on the floor and can slide and bounce.
This tool approximates the metal with a lattice of point masses and springs (a mass-spring model) and shows each spring's elongation ratio (strain) as shades of red as an indication of stress. The deeper the red, the more strongly that area is stretched or compressed. A round marker shows the location of the maximum stress, and its value is shown as a percentage. The deepest red corresponds to 6% or more on the legend.
No. This tool replaces the metal with a simplified 2D lattice of point masses and springs for education and demonstration, and the displayed stress (strain) is only a rough indication. Designing or evaluating the strength of real products and structures requires professional analysis such as the finite element method (FEM) and the judgment of experts.
No. Both shape editing and the physics simulation run entirely within your browser. The shapes you draw and your material settings are never sent to or stored on any server.
Stiffness is the hardness of the springs; the larger it is, the less the shape deforms. Viscosity (damping) controls how quickly vibration settles; small values keep it swinging like a spring, while large values make it settle slowly like a viscous body. Mass is the weight of each point mass; larger values make the motion slower. Steel, aluminum, and rubber-like presets are also provided.
The more cells the shape has, the more computation is required. Try making the shape smaller, closing other tabs and apps, or stopping the simulation with the pause button while you edit the shape. All computation runs on your device, so performance depends on your device.