IMECH-IR  > 流固耦合系统力学重点实验室
A two-scale contact model for collisions between blocks in CDEM
Li SH(李世海); Tang DH(唐德泓); Wang J(王杰); Tang, DH (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
Source PublicationSCIENCE CHINA-TECHNOLOGICAL SCIENCES
2015-09
Volume58Issue:9Pages:1596-1603
ISSN1674-7321
AbstractContact detection between interacting blocks is of great importance to discontinuity-based numerical methods, such as DDA, DEM, and NMM. A rigorous contact theory is a prerequisite to describing the interactions of multiple blocks. Currently, the penalty method, in which mathematical springs with high stiffness values are employed, is always used to calculate the contact forces. High stiffness values may cause numerical oscillations and limit the time step. Furthermore, their values are difficult to identify. The intention of this study is to present a two-scale contact model for the calculation of forces between colliding blocks. In this new model, a calculation step taken from the moment of contact will be divided into two time stages: the free motion time stage and the contact time stage. Actually, these two time stages correspond to two real physical processes. Based on this, we present a new numerical model that is intended to be more precise and useful in calculating the contact forces without mathematical springs. The propagation of the elastic wave during collision is of a characteristic length, which determines the volume of material involved in the contact force calculation. In conventional contact models, this range is always regarded as the length of one element, which may lead to an inaccurate calculation of contact forces. In fact, the real scale of this range is smaller than the length of a single element, and subdivided elements, which are refined according to the characteristic length and are presented in the new contact model.
KeywordTwo-scale Contact Model Collision Elastic Wave Element Subdivision
DOI10.1007/s11431-015-5902-4
URL查看原文
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000360935100012
WOS KeywordDISCONTINUOUS DEFORMATION ANALYSIS ; NUMERICAL MANIFOLD METHOD ; DISTINCT ELEMENT MODEL ; ANALYSIS 3-D DDA ; MULTIBODY SYSTEMS ; POLYHEDRAL BLOCKS ; IMPACT ANALYSIS ; FORMULATION ; ALGORITHM
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Multidisciplinary ; Materials Science, Multidisciplinary
Funding OrganizationThis work was supported by the National Basic Research Program of China ("973" Project) (Grant No. 2015CB250903), the CAS Strategic Priority Research Program (B) (Grant No. XDB10030303), the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (Grant No. 2012BAK10B01), and the Youth Science Fund of the National Natural Science Foundation of China (Grant No. 11302230).
CSCD IDCSCD:5530189
DepartmentLMFS工程地质体力学(LEM)
Classification二类/Q2
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58425
Collection流固耦合系统力学重点实验室
Corresponding AuthorTang, DH (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Li SH,Tang DH,Wang J,et al. A two-scale contact model for collisions between blocks in CDEM[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2015,58(9):1596-1603.
APA Li SH,唐德泓,王杰,&Tang, DH .(2015).A two-scale contact model for collisions between blocks in CDEM.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,58(9),1596-1603.
MLA Li SH,et al."A two-scale contact model for collisions between blocks in CDEM".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 58.9(2015):1596-1603.
Files in This Item: Download All
File Name/Size DocType Version Access License
J2015-064.pdf(661KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li SH(李世海)]'s Articles
[唐德泓]'s Articles
[王杰]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li SH(李世海)]'s Articles
[唐德泓]'s Articles
[王杰]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li SH(李世海)]'s Articles
[唐德泓]'s Articles
[王杰]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: J2015-064.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.