基于亚塑性理论的无粘性土压缩试验应力应变的研究

基于亚塑性理论的无粘性土压缩试验应力应变的研究 English Version

中国石油天然气管道工程有限公司；大连理工大学工业装备结构分析国家重点实验室；中国石油天然气管道局河北廊坊065000；辽宁大连116023；河北廊坊065000；

1.China Petroleum Pipeline Engineering Corporation Langfang 065000 China 2.State Key Laboratory of Structure Analysis for Industrial Equipment Dalian University of Technology Dalian 116023 China 3.China Petroleum Pipeline Bureau Langfang 065000 China

摘要: 根据亚塑性理论推导出了颗粒体材料压缩试验的应力应变方程,研究了亚塑性本构模型中颗粒硬度hs和指数n的实验确定方法,并且指明其不足之处。根据亚塑性理论和优化方法,提出了用局部搜索最优解来确定hs和n的方法。结果表明,文中方程可以用来确定压缩试验的应力应变关系。
- 亚塑性 /
- 改进方法 /
- 本构关系
Abstract: According to the hypoplastic constitutive model,the stress-strain equation of granular materials could be obtained from oedometer test.The determination of granulate hardness hs and exponent n in a hypoplastic constitutive model was investigated,and a hypoplastic constitutive model was presented based on hypoplasticity.According to hypoplasticity and optimization,the authors put forward an improved method to determine the parameters of n and hs using iterative operation.The further investigation of the equation showed that it could be used to determine stress-strain relation in oedometer test.
- hypoplasticity /
- improved method /
- constitutive relations