How Do You Calculate Pendulum Impact Force in G's?

[Joeg]

I need to run an experiment using a swinging steel ball pendulum to impact diffrent materials to determine impact integrity in g's.
What is the formula for this? In g (x times gravity)
Joe G

 

[russ_watters]

There is no easy way to calculate g forces by that method because it depends on how much the sample deforms during the collision. Usually, such an apparatus is used to find fracture energy.

http://en.wikipedia.org/wiki/Charpy_impact_test