Constitutive Modeling for the Elastic-viscoplastic Behavior of High Density Polyethylene under Cyclic Loading

Author(s): 
Zhengpan Qi (School of Aerospace Engineering, Chongqing University)

 

This work aims at investigating the deformation mechanism, developing the constitutive model especially for the cyclic-loading behavior, and proposing an efficient approach for model calibration. Firstly, the deformation mechanism was successfully explored by conducting a special designed relaxation-unloading test by which the time-independent elastic-plastic behavior was decoupled from the time-dependent overall deformation behavior.