Contact description in numerical simulation for Rock mechanics

L. Sun, J. Zhao, G. F. Zhao

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

2 Citations (Scopus)


Rock and Rock mass are typical discontinuous materials. A proper contact mechanism is the prerequisite to perform discontinuous numerical simulations. At present, analytical models, physical models and parameterized models are broad used. Physical models are suitable for explicit methods while parameterized models are suitable for implicit methods. The penalty model has the advantage of not increasing the unknown variables but the choice of the penalty number is difficult. In this paper, a spherical contact model is presented using penalty method and open-close iteration algorithm. The model is validated by the collision test which describes the contact properties of materials. The results show that penalty numbers can be filtered with given maximum interpenetration rate and the coefficient of restitution.

Original languageEnglish
Title of host publicationHarmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics
PublisherCRC Press
Number of pages4
ISBN (Print)9780415804448
Publication statusPublished - 2012
Externally publishedYes
EventInternational Society of Rock Mechanics Series of Symposia and Conferences 2011 - China National Convention Center (CNCC), Beijing, China
Duration: 18 Oct 201121 Oct 2011
Conference number: 12th


ConferenceInternational Society of Rock Mechanics Series of Symposia and Conferences 2011
Abbreviated titleISRM 2011
OtherInternational Congress on Rock Mechanics of the International Society for Rock Mechanics 2011

Proceedings title = Harmonising Rock Engineering and the Environment
Internet address


  • Dynamics
  • Numerical modeling
  • Rock joints
  • Rock properties

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