Investigation of multi-scale modeling strategies to simulate high velocity impact damage

Abstract

The presentthesis deals with setting up computationally efficient muli-scale finite element (FE) models for simulation of impact problems in industrial applications. In particular, the main focus is to introduce and investigate possible mesh-matching techniques in the FE explicit code PAM-CRASH to be used at the boundaries of non-conform meshes. Two methods, namely multi-point constraint and a contact-type tied interface are investigated in a low-complexity model under quasi-static loading. Due to superiority of tied interface method in sense of convenience of application, this method is selected to be investigated further in multi-scale simulations of low-velocity impact of hard object on a CFRP laminated plate and high velocity impact of a soft body on a C-frame stiffened composaite panel. As the outcome of teh study, tied interface method in multi-scale FE-models proved to reproduce sufficiently accurate global responses as well as delamination in the impact zone compared to test data.