2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 7: Yang Intl. Symp. / Multiscale Material Mechanics
| Editors: | Kongoli F, Aifantis E, Wang H, Zhu T |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 190 pages |
| ISBN: | 978-1-987820-48-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
A novel XFEM for simulating crack propagation in inhomogeneous material
Chuwei Zhou1;1NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS, Nanjing, China;
Type of Paper: Regular
Id Paper: 258
Topic: 1
Abstract:
A novel numerical algorithm combining finite element sub-partition and substructure was developed to simulate crack extension. In this strategy, all elements group into three: elements split by a crack, elements encompassing a crack tip and normal elements. The first and second sorts of elements will be sub-partitioned. Grouping of elements is dynamic varying with crack extension. The sub-partitioned elements coving one crack are viewed as a sub-structure. This sub-structure is thereby dynamic also for its element member will increase when the crack extends. In this algorithm, a crack can extend along any path and free from the limit of the original mesh. The global re-mesh is not needed and the total degree of freedom keeps the same whether cracks extending or nucleating new cracks. This method was adopted to calculate the stress intensity factors of central crack in an infinite plane and to simulate the crack propagation in three-point bending beam to valid its accuracy. It was further used in micro-scale crack moving in the homogeneous material to demonstrate its adaptability for simulating of complex path cracking.