| 考虑弹塑性本构的三维模态变形体离散元方法断裂模拟 |
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| 引用本文： | 金峰,胡卫,张冲,王进廷.考虑弹塑性本构的三维模态变形体离散元方法断裂模拟[J].工程力学,2011(5):1-7. |
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| 作者姓名： | 金峰 胡卫 张冲 王进廷 |
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| 作者单位： | 清华大学水沙科学与水利水电工程国家重点实验室;华东中建地产有限公司;中国水电顾问集团成都勘测设计研究院; |
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| 基金项目： | 国家自然科学基金项目(90510018,50779021); “十一五”国家科技支撑计划项目(2008BAB29B05) |
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| 摘 要： | 三维模态变形体离散元(3MDEM)是针对离散块体系统在小应变、有限位移、有限转动条件下,用变形模态模拟块体变形,经过严格推导建立的一种离散元方法.该文在3MDEM平台实现对结构从弹性、到塑性再到断裂破坏的连续非连续全过程模拟.鉴于传统的接触破坏准则在塑性计算中的缺陷,该文提出基于塑性应变的接触破坏判断准则,并采用双块体...
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| 关 键 词： | 模态离散元 数值方法 弹塑性 非连续 接触 |
A FRACTURE SIMULATION USING 3-D MODE DISTINCT ELEMENT METHOD(3MDEM) WITH ELASTOPLASTIC CONSTITUTIVE MODEL |
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| JIN Feng,HU Wei,ZHANG Chong,WANG Jin-ting,Shanghai ,.Chengdu Hydroelectric Investigation & Design Institute of SPC,Chengdu,Sichuan ,China.A FRACTURE SIMULATION USING 3-D MODE DISTINCT ELEMENT METHOD(3MDEM) WITH ELASTOPLASTIC CONSTITUTIVE MODEL[J].Engineering Mechanics,2011(5):1-7. |
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| Authors: | JIN Feng HU Wei ZHANG Chong WANG Jin-ting Shanghai Chengdu Hydroelectric Investigation & Design Institute of SPC Chengdu Sichuan China |
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| Affiliation: | JIN Feng1,HU Wei1,2,ZHANG Chong3,WANG Jin-ting1(1.State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China,2.China State Construction Property Corporation LTD(East China),Shanghai 200122,3.Chengdu Hydroelectric Investigation & Design Institute of SPC,Chengdu,Sichuan 610072,China) |
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| Abstract: | 3-D mode distinct element method(3MDEM) is a distinct element method under the assumption of small strain,finite displacement and finite rotation for blocks.The deformation of blocks is expressed as a combination of deformation modes in 3MDEM.In this paper,simulation from continuum to discontinuum including elastic-plastic-fracture is presented on 3MDEM platform.Due to the shortcoming of common criterion for contact fracture,a new criterion based on plastic strain is introduced,which is verified by two nume... |
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| Keywords: | mode distinct element method numerical method elastoplastic discontinuum contact |
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