TY - JOUR
T1 - A multi-shell cover algorithm for contact detection in the three dimensional discontinuous deformation analysis
AU - Wu, Wei
AU - Zhu, H.
AU - Zhuang, X.
AU - Ma, Guowei
AU - Cai, Y.
PY - 2014
Y1 - 2014
N2 - © 2014 Elsevier Ltd. In three dimensional discontinuous deformation analysis (3D DDA), the contact detection between blocks is the most expensive part in terms of the total computational cost. The detection normally comprises two stages, namely the search of neighboring blocks and the identification of contact modes. The first stage aims to find out all possible neighboring blocks and the second is to identify the exact contact modes between of neighboring blocks from their vertices, edges and faces. In this paper, an efficient and robust spatial contact detection algorithm is presented linking the above mentioned two stages using a novel multi-shell cover (MSC) system and decomposition of geometrical sub-units. The present MSC method greatly reduces the contact detection volume and iterations. This paper also provides a unified formula of vertex to face and edge to edge contacts. The proposed method is implemented in a 3D DDA computer program. Numerical examples are tested and the results show improved computational efficiency comparing with existing methods.
AB - © 2014 Elsevier Ltd. In three dimensional discontinuous deformation analysis (3D DDA), the contact detection between blocks is the most expensive part in terms of the total computational cost. The detection normally comprises two stages, namely the search of neighboring blocks and the identification of contact modes. The first stage aims to find out all possible neighboring blocks and the second is to identify the exact contact modes between of neighboring blocks from their vertices, edges and faces. In this paper, an efficient and robust spatial contact detection algorithm is presented linking the above mentioned two stages using a novel multi-shell cover (MSC) system and decomposition of geometrical sub-units. The present MSC method greatly reduces the contact detection volume and iterations. This paper also provides a unified formula of vertex to face and edge to edge contacts. The proposed method is implemented in a 3D DDA computer program. Numerical examples are tested and the results show improved computational efficiency comparing with existing methods.
U2 - 10.1016/j.tafmec.2014.03.004
DO - 10.1016/j.tafmec.2014.03.004
M3 - Article
VL - 72
SP - 136
EP - 149
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
SN - 0167-8442
IS - 1
ER -