Because the deformation process of voids inside the material can not be observed in dynamic shock experiments

the micro void deformation in pure aluminum is simulated under the shock compression by supposing three matrix material models

including the bilinear model

the plasticity kinematic model and the strain rate-dependent plasticity model.The contracting results indicate that: If the matrix material is the bilinear model

the fluidic phenomenon will be displayed in the compressing void

and the change of strain rate and the hardening style of the material will not affect the deformation of the void.If the matrix material is rate-dependent plasticity model

the fluidic phenomenon will not appear in the compressing voids

and the deformation of the voids is dependent on the present strain rate and the strain rate history.If the matrix material is plasticity kinematic model

the void volume will not decrease any more when it reaches a critical size.As the units around the void will be deleted due to its failure

the void will be bigger instead.The void deformation will also be affected by the hardening coefficient in this situation.By comparing the three computing results with different material models

the main factor of void deformation will be determined.