Determining stress induced in a plate by impact from a sphere
Determining stress induced in a plate by impact from a sphere
(OP)
I am trying to take the parameters of a falling ball of ice that is impacting an A36 steel pinned sheet and theoretically determine the amount of stress experienced by the sheet. More specifically, I am trying to determine a relationship between velocity and radius of the ball that would just reach the modulus of resilience of A36 steel.
I realize I could run hundreds of simulations on LS-DYNA and zero in on the points, but there has to be a way to solve this using the formulas they are using. I'm just not sure what they are or how to find them.
Anyone have any suggestions or happen to know such a formula that could be used?
Thank you in advance.
I realize I could run hundreds of simulations on LS-DYNA and zero in on the points, but there has to be a way to solve this using the formulas they are using. I'm just not sure what they are or how to find them.
Anyone have any suggestions or happen to know such a formula that could be used?
Thank you in advance.





RE: Determining stress induced in a plate by impact from a sphere
Basically it is NOT simple - you have to determine how fast the ball de-accelerates - time or distance. Then F=ma.
Finding the "a" is the problem....
In the case of an ice ball - you might also have a "shrinking" M??
RE: Determining stress induced in a plate by impact from a sphere
In practice that will be an overestimate of the stresses because the ice ball will fall apart absorbing some of the enrgy.
Cheers
Greg Locock
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