Rigid body rotation and block internal discretization in DDA analysis

Yung Ming Cheng, Y. H. Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

72 Citations (Scopus)


In the original formulation of DDA by Shi, a linear displacement function term is used. This has the limitations of uncontrolled block and stress distortion due to rigid body rotation. In the present paper, the authors propose a new iterative method which can avoid the distortion due to the rotation even when the rotation or number of time-step is large. Furthermore, the authors propose a simple internal discretization scheme which is applicable for both concave and convex polygon which is particularly important for a large block. The stress and strain distribution with a large block can be obtained with ease under this scheme. The numerical examples as shown have demonstrated the advantages of the present proposal in DDA analysis.
Original languageEnglish
Pages (from-to)567-578
Number of pages12
JournalInternational Journal for Numerical and Analytical Methods in Geomechanics
Issue number6
Publication statusPublished - 1 May 2000

ASJC Scopus subject areas

  • Computational Mechanics
  • General Materials Science
  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials


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