Paper Title:

A New Concept for Material Fragmentation Simulation – Nodes Separation

Periodical Advanced Materials Research (Volumes 160 - 162)
Main Theme Materials Science and Engineering Applications
Edited by Guojun Zhang and Jessica Xu
Pages 558-563
DOI 10.4028/www.scientific.net/AMR.160-162.558
Citation Xiao Tian Zhang et al., 2010, Advanced Materials Research, 160-162, 558
Online since November, 2010
Authors Xiao Tian Zhang, Guang Hui Jia, Hai Huang
Keywords Fracture, Fragmentation, Impact, Material, Mechanic
Price US$ 28,-
Article Preview
View full size
Abstract

A method for material fragmentation based on Lagrangian FEM with the concept of nodes separation is proposed. This method is consisted of nodes separation mechanism and elements distortion erosion. In the simulation the nodes of failure elements are separated to form crack and distorted elements are detected and eliminated to prevent singularity. Nodes separation method can greatly improve the energy loss disadvantage in the failure erosion method. Based on LS-dyna secondary development the method is implemented. Hypervelocity impact problem of satellite protective structure is simulated and compared to experimental data for calibration. The performance of multi layer aluminum mesh shield under hypervelocity impact is also evaluated. The results show the high efficiency and applicability of nodes separation method in practical problems.