Is it possible to calculate Impact Force non-experimentally?

  • Thread starter spanton89
  • Start date
  • #1
1
0
Hi,

I am trying to calculate the impact force of a rubber weight falling on a rubber surface. I am aware that to calculate impact force, I need to know the amount of deflection after impact. Is there a way to calculate this, using material parameters, rather than experimentally?

Thanks in advance.
 

Answers and Replies

  • #2
688
1
You could roughly estimate by modelling the rubber ball as a linear spring:

F_spring = k y

where k is the "spring constant" for rubber and y is the vertical deflection.

The energy stored in the spring is:

U_spring = (1/2) k y^2

If the rubber weight of mass m is dropped from height h, its PE = mgh

So,

U_spring = mgh and

y_spring = sqrt (2mgh / k)

The velocity on impact is:

v = sqrt (2gh)

Assuming constant decleration, the impact force is:

F_impact = v^2 / 2y
 

Related Threads on Is it possible to calculate Impact Force non-experimentally?

  • Last Post
Replies
7
Views
55K
  • Last Post
Replies
3
Views
8K
Replies
2
Views
34K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
9
Views
3K
Replies
3
Views
5K
  • Last Post
Replies
7
Views
5K
  • Last Post
Replies
1
Views
13K
Replies
2
Views
1K
Replies
15
Views
1K
Top