Crash Analysis with Not Relevant Energy Output

Hello Guys,

 

I am doing Impact Analysis on a Structure of different Materials like Steel, Alu and Composites by hitting with Impactor of Steel. 

 

After the Impact the structure breaks but then Energy is continuously Increasing which i dont understand why it doesnt reamins constant ?

 

I saw the eroded Internal Energy of my model which is also higher so i think may be this can be the reason or is it anything else possible ?

 

I have attached the Energy Plot file, please let me know if anybody can help me to understand this plot better or f there can be the error in my model.

 

BestRegards,

 

Ashish  

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