| 岩石类材料的能量基率相关弹塑性损伤模型 |
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| 引用本文： | 张安康,陈士海,杜荣强,魏海霞.岩石类材料的能量基率相关弹塑性损伤模型[J].岩土力学,2010,31(Z1):207-210. |
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| 作者姓名： | 张安康 陈士海 杜荣强 魏海霞 |
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| 作者单位： | 山东科技大学 土木建筑学院，山东 青岛 266510 |
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| 基金项目： | 国家自然科学基金，山东省"泰山学者"建设工程专项经费、土木工程防灾减灾山东省重点实验室资助项目 |
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| 摘 要： | 岩石类材料的动态本构模型研究是岩石动力学理论研究的基础问题。相比于其他的非线性理论，损伤力学理论已证实可成功地模拟岩石类材料的应变软化和渐进破坏等特征，可用于解释其静、动态破坏机制。现有的通过理论推导得出的动态本构中大部分并未考虑损伤因素，而通过维象学试验方法建立起的动态本构则缺乏损伤力学理论基础。为此基于弹性余能等效原理和损伤力学的基本概念，并结合动态试验，推导建立了岩石类材料的率相关弹塑性损伤模型。并通过与文献中的试验资料对比，证明了模型的有效性，为岩石类材料组成的结构的动力响应研究奠定了基础。
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| 关 键 词： | 损伤 演化方程 率相关 各向异性 本构模型 |
| 收稿时间： | 2010-04-23 |
Energy-based elastoplastic damage model for rock materials with strain rate effects |
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| ZHANG An-kang,CHEN Shi-hai,DU Rong-qiang,WEI Hai-xia.Energy-based elastoplastic damage model for rock materials with strain rate effects[J].Rock and Soil Mechanics,2010,31(Z1):207-210. |
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| Authors: | ZHANG An-kang CHEN Shi-hai DU Rong-qiang WEI Hai-xia |
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| Institution: | College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao, Shandong 266510, China |
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| Abstract: | Researches of dynamic constitutive models for rock materials are the base of theoretical researches of rock dynamic mechanics. Comparing with other nonlinear theories, the damage mechanics proved that it can successfully simulate strain softening and being gradually destroyed of rock materials, and explained its dynamic or static destroying mechanism. The existing dynamic constitutive models which are from theoretical derivation mostly ignore damages, while from experiments are short of damage mechanics theory. Basing on equivalent elastic complementary energy theory and basic concepts of damage mechanics, combining with dynamic experiments, an elastoplastic damage model for rock materials with strain rate effects is established. Comparing with experimental dates in literatures, the validity of the model is proved, so as to found the bases for dynamic response researches of rock material structures. |
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| Keywords: | damage evolvement equation with strain rate effects anisotropy constitutive model |
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