| LIU Peng,WANG Zhongtao,LI Xinzhong,CHAN Andrew. 2015. Calibration and validation of a sand model considering the effects of wave-induced principal stress axes rotation. Acta Oceanologica Sinica, 34(7):105－115 |
| Calibration and validation of a sand model considering the effects of wave-induced principal stress axes rotation |
| 考虑波浪引起的主应力轴旋转效应的砂土本构模型及其验证 |
| Received:December 12, 2014 Revised:February 05, 2015 |
| DOI：10.1007/s13131-015-0655-2 |
| Key words:principal stress axes rotation constitutive model hollow torsional shear experiment |
| 中文关键词: 主应力轴旋转 本构模型 空心扭剪试验 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | LIU Peng | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China | | | WANG Zhongtao | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China | zhongtao@dlut.edu.cn | | LI Xinzhong | General Research Institute of China National Offshore Oil Corporation, Beijing 100010, China | | | CHAN Andrew | Faculty of Science and Technology, Federation University Australia, Victoria 3350, Australia | |
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| Abstract: |
| Principal stress axes rotation influences the stress-strain behavior of sand under wave loading. A constitutive model for sand, which considers principal stress orientation and is based on generalized plasticity theory, is proposed. The new model, which employs stress invariants and a discrete memory factor during reloading, is original because it quantifies model parameters using experimental data. Four sets of hollow torsion experiments were conducted to calibrate the parameters and predict the capability of the proposed model, which describes the effects of principal stress orientation on the behavior of sand. The results prove the effectiveness of the proposed calibration method. |
| 中文摘要: |
| 波浪荷载引起的主应力轴旋转会影响砂土的应力-应变关系。文中基于广义塑性力学理论, 提出了一个可以考虑主应力轴方向的砂土本构模型, 模型中采用应力不变量和应力历史函数模拟循环加载效应。同时提供了一套完整的本构模型参数的标定方法。四组空心扭剪试验分别用于模型参数标定和验证模型的准确性。通过与试验结果的对比, 验证了所提出的本构模型及其标定方法可以较好地反映主应力轴方向效应。 |
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