Impact and CAI simulations

[loyal979]

Hello all,

I am working on compression after impact simulations and just wondering on how to stabilize the plate after impact to perform the compression test. Would introducing rayleigh damping to the model be good method to do it? or is there another way more efficient? Please share your suggestions

Thanks
Matt

 

[FEA way]

Damping can work but I would choose another way and create additional step for stabilization (so that there is impact in the first step, then stabilization and then compression). Three different approaches are described in literature (all use additional step between impact and compression):

1) replacing boundary conditions with those needed for compression test (clamping the model):

„Predicting low velocity impact damage and Compression-After-Impact (CAI) behavior of composite laminates” by W. Tan et al.

2) applying viscous pressure on sample:

„Numerical/Experimental Study Of The Impact and Compression After Impact On GFRP Composite For Wind/Marine Applications” by G. Perillo et al.

3) applying succcesive stops and releases of velocity of all points of the specimen:

„Finite element analysis of CFRP laminates subjected to compression after edge impact” by B. Ostre et al.