How does bullet proof glass work?

Question

How does bullet proof glass work?

In: 22

Answer 1

A bit like an ogre – layers

Bullet proof glass is generally a bunch of layers of hard glass and squishy rubber/plastic.

The bullet hits an outer layer of glass and gives up some energy deforming and shattering that layer of glass, that glass then spreads the energy through the squishy layer so it doesn’t crack the next layer of glass and the process repeats with the cracking of the glass absorbing a fair amount of energy

Bullet proof glass is generally quite thick which gives it more space to burn off the energy of the incoming bullet. The more powerful a bullet it needs to stop the thicker it needs to be.