欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
研究了颗粒破碎对硬化准则和剪胀性的影响,提出了修正后的硬化准则和剪胀方程,并基于有效塑性功的概念,建立了考虑颗粒破碎的粗粒土临界状态弹塑性本构模型。将所提出的模型与未考虑颗粒破碎的模型用于不同围压下粗粒土室内大三轴试验的数值模拟,对比分析表明：模型计算结果与试验实测结果更为一致,能较好地描述低围压和相对中高围压下的强度和变形特性,得出颗粒破碎导致粗粒土强度降低,压缩变形增大,并利用离散单元法模拟一维压缩颗粒破碎试验对该结论进行了验证。
英文摘要：
The influences of particle breakage on hardening rule and dilatancy are studied,and the modified equations are proposed respectively.When the breakage energy is introduced into the hardening rule and dilatancy of coarse granular aggregates,a new elasto-plastic constitutive model considering the particle breakage is developed based on the concept of effective plastic work.The numerical simulations for the various confining pressure tests are performed in a developed program by use of the proposed model and the model without consideration of the particle breakage.It is shown that the proposed model can accurately describe the strength and deformation of coarse granular aggregates subjected to low and relative high confining pressures.In addition,particle breakage could decrease the shear strength and increase the compression deformation.It is verified by the simulation of 1D compression tests in discrete element method.
同期刊论文项目
同项目期刊论文
位置：