Details
| Original language | English |
|---|---|
| Pages (from-to) | 136-149 |
| Number of pages | 14 |
| Journal | Theoretical and Applied Fracture Mechanics |
| Volume | 72 |
| Issue number | 1 |
| Publication status | Published - 13 Apr 2014 |
| Externally published | Yes |
Abstract
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.
Keywords
- Computational cost, Contact detection, Neighbor searching, Three dimensional discontinuous deformation analysis (3D DDA)
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanical Engineering
- Mathematics(all)
- Applied Mathematics
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In: Theoretical and Applied Fracture Mechanics, Vol. 72, No. 1, 13.04.2014, p. 136-149.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A multi-shell cover algorithm for contact detection in the three dimensional discontinuous deformation analysis
AU - Wu, Wei
AU - Zhu, Hehua
AU - Zhuang, Xiaoying
AU - Ma, Guowei
AU - Cai, Yongchang
N1 - Funding information: The authors gratefully acknowledge the supports from the Key Programme from Natural Science Foundation of China ( 41130751 ), National Basic Research Program of China ( 973:2011CB013800 ), Research Program for Development of Western China Communication ( 2011ZB04 ) and funding by SRF for ROCS, SEM, and Shanghai Chengguang Program ( 12CG20 ). The first author is supported by China Scholarship Council (CSC) during his study in UWA.
PY - 2014/4/13
Y1 - 2014/4/13
N2 - 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 - 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.
KW - Computational cost
KW - Contact detection
KW - Neighbor searching
KW - Three dimensional discontinuous deformation analysis (3D DDA)
UR - http://www.scopus.com/inward/record.url?scp=84922338392&partnerID=8YFLogxK
U2 - 10.1016/j.tafmec.2014.03.004
DO - 10.1016/j.tafmec.2014.03.004
M3 - Article
AN - SCOPUS:84922338392
VL - 72
SP - 136
EP - 149
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
SN - 0167-8442
IS - 1
ER -