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| The polyhedron overlap algorithm based on the blocky discrete element method |
| Received:February 21, 2022 Revised:April 12, 2022 |
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| DOI：10.7511/jslxCMGM202201 |
| KeyWord:blocky DEM contact overlap algorithm geometric dualization theory Coupling Simulator |
| Author | Institution |
| 刘广煜 |
清华大学 水沙科学与水利水电工程国家重点实验室, 北京 |
| 徐文杰 |
清华大学 水沙科学与水利水电工程国家重点实验室, 北京 |
| 周乾 |
清华大学 水沙科学与水利水电工程国家重点实验室, 北京 |
| 冯泽康 |
清华大学 水沙科学与水利水电工程国家重点实验室, 北京 |
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| Abstract: |
| In recent years,with the development of the discontinuous media modelling,a discrete element method has been an important tool to investigate the mechanical response of granular materials.For arbitrarily shaped blocks,accurate contact detection has been one of critical issues.In this study,based on the geometric dualization theory,the polyhedron contact overlap volume algorithm has been developed in the framework of block DEM under Coupling Simulator (CoSim).This algorithm combines Gilbert-Johnson-Keerthi (GJK) and Quickhull algorithms to calculate the contact overlap volume and the contact characteristics such as normal direction,contact area,and penetration depth which can be extracted from the contact overlap volume.Simulations including particle collision and failure of a masonry structure are conducted to verify the algorithm. |
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