Breaking Bridge

Created by Andrew Wang

Mass-Spring Physics System

Springs

Using the Cloth Simulation from Lab 13 and Equations for Springs, I converted it from 3D to 2D and build the bridge beams. Each beam is a "Spring" with K as 1e9.

Dampening

To prevent the bridge from excessively shaking back and forth. I added dampening so it would not move as much.

Strain

Using the equation: Strain = (l - L) / L, I could use that to color the beam to determine if it was expanding or compressing.

Breaking

Using the strain equation on the left, at a certain point of expanding or compressing (Strain greater than 0.1 or less than -0.1). I would break the beam.

Video and Code Source

You can find the source at my BitBucket
The library I used was Eigen.

Images

File Icons

Initial State

This is the bridge at the start of the program (t = 0).

File Icons

No External Force State

This is the bridge as time is on with no forces on the bridge besides the weight of each Beam.

File Icons

Strain

This is the bridge with a huge force of pressed on it at a certain point.

File Icons

Breaking

With excessive force placed on the bridge, it will break and look similar to this.

Sources: Dr. Seuda's Lab 13 Code for Cloth Simulation