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Improvement of contact calculation in spherical discontinuous deformation analysis

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Abstract

Discontinuous deformation analysis (DDA) method is a newly developed discrete element method which employs the implicit time-integration scheme to solve the governing equations and the open-close iteration (OCI) method to deal with contact problem, its computational efficiency is relatively low. However, spherical element based discontinuous deformation analysis (SDDA), which uses very simple contact type like point-to-point contact, has higher calculation speed. In the framework of SDDA, this paper presents a very simple contact calculation approach by removing the OCI scheme and by adopting the maximal displacement increment (MDI). Through some verification examples, it is proved that the proposed method is correct and effective, and a higher computational efficiency is obtained.

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Authors and Affiliations

  1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China

    Long Wang, YuYong Jiao, GangHai Huang, Fei Zheng & Fei Tan

  2. Department of Civil and Environmental Engineering, University of California, Berkeley, 94720, USA

    Fei Zheng

  3. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore

    ZhiYe Zhao

Authors
  1. Long Wang
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  2. YuYong Jiao
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  3. GangHai Huang
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  4. Fei Zheng
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  5. ZhiYe Zhao
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  6. Fei Tan
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Correspondence to YuYong Jiao.

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Wang, L., Jiao, Y., Huang, G. et al. Improvement of contact calculation in spherical discontinuous deformation analysis. Sci. China Technol. Sci. 60, 765–771 (2017). https://doi.org/10.1007/s11431-016-0203-6

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  • DOI: https://doi.org/10.1007/s11431-016-0203-6

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