Anomalous Response of a Circular Plate Under Blast Loading with the ALE Method

Anomalous response of elastic-plastic circular plate subjected to TNT air blast loading is studied using LS-DYNA as the numerical tool. TNT. air and plate are taken as varied finite elements with ALE arithmetic comparing full model and 1/4 model. Yield stress and strain rate have been considered for anomalous responses. It is found by numerical analyses that ALE arithmetic is a better method for structural anomalous dynamic behavior under blast loading. Material parameters and the thickness of the plate have influence on anomalous response. Anomalous response of the plate appeared easily when yield stress is lower and the thickness of plate thinner. Strain rate should be considered for numerical simulation of anomalous response under blast loading.