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

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.