IMECH-IR  > 流固耦合系统力学重点实验室
A semi-spring and semi-edge combined contact model in CDEM and its application to analysis of Jiweishan landslide
Feng C(冯春); Li SH(李世海); Liu XY(刘晓宇); Zhang YN(张亚南)
Source PublicationJournal of Rock Mechanics and Geotechnical Engineering
2014
Volume6Issue:1Pages:26-35
ISSN1674-7755
Abstract

Continuum-based discrete element method (CDEM) is an explicit numerical method used for simulation of progressive failure of geological body. To improve the efficiency of contact detection and simplify the calculation steps for contact forces, semi-spring and semi-edge are introduced in calculation. Semispring is derived from block vertex, and formed by indenting the block vertex into each face (24 semisprings for a hexahedral element). The formation process of semi-edge is the same as that of semi-spring (24 semi-edges for a hexahedral element). Based on the semi-springs and semi-edges, a new type of combined contact model is presented. According to this model, six contact types could be reduced to two, i.e. the semi-spring target face contact and semi-edge target edge contact. By the combined model, the contact force could be calculated directly (the information of contact type is not necessary), and the failure judgment could be executed in a straightforward way (each semi-spring and semi-edge own their characteristic areas). The algorithm has been successfully programmed in C++ program. Some simple numerical cases are presented to show the validity and accuracy of this model. Finally, the failure mode, sliding distance and critical friction angle of Jiweishan landslide are studied with the combined model.

KeywordContinuum-based Discrete Element Method (Cdem) Contact Detection Method Semi-spring Semi-edge Landslide
Indexed ByCSCD
Language英语
Funding Organizationthe National Basic Research Program of the Ministry of Science and Technology of China (Grant No. 2010CB731506) ; the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (Grant No. 2012BAK10B01) ; the Youth Science Fund of National Natural ...
CSCD IDCSCD:5067031
DepartmentLMFS工程地质体力学(LEM)
Citation statistics
Cited Times:14[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/55148
Collection流固耦合系统力学重点实验室
Recommended Citation
GB/T 7714
Feng C,Li SH,Liu XY,et al. A semi-spring and semi-edge combined contact model in CDEM and its application to analysis of Jiweishan landslide[J]. Journal of Rock Mechanics and Geotechnical Engineering,2014,6(1):26-35.
APA Feng C,Li SH,Liu XY,&Zhang YN.(2014).A semi-spring and semi-edge combined contact model in CDEM and its application to analysis of Jiweishan landslide.Journal of Rock Mechanics and Geotechnical Engineering,6(1),26-35.
MLA Feng C,et al."A semi-spring and semi-edge combined contact model in CDEM and its application to analysis of Jiweishan landslide".Journal of Rock Mechanics and Geotechnical Engineering 6.1(2014):26-35.
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