Inspection of three sophisticated constitutive models based on monotonic and cyclic tests on fine sand: Hypoplasticity vs. Sanisand vs. ISA
Inspection of three sophisticated constitutive models based on monotonic and cyclic tests on fine sand: Hypoplasticity vs. Sanisand vs. ISA
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DOI：
10.1016/j.soildyn.2019.05.001
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发表时间：
2019-09
影响因子：
4
通讯作者：
T. Wichtmann;W. Fuentes;T. Triantafyllidis
中科院分区：
文献类型：
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作者：
T. Wichtmann;W. Fuentes;T. Triantafyllidis
三个最先进的本构模型的预测质量的砂已被检查的基础上比较的结果，从元件测试模拟和实验室测试。考察了亚塑性和晶间应变模型、Sanisand 2004版弹塑性模型和最近提出的伊萨模型。在本研究中使用的卡尔斯鲁厄细砂上进行的实验室试验可在第一作者的主页上免费获得。模型预测已被检查排水和不排水单调三轴试验与各种密度和压力和单调试验与几个数量的非和再加载循环。然而，主要的焦点在于不排水循环三轴试验，无论是应力或应变控制和不同的密度，初始应力和应力/应变幅。分析了各种试验条件下不同本构模型的优缺点。
The prediction quality of three of the most sophisticated constitutive models for sands has been examined based on a comparison of results from element test simulations and laboratory tests. Hypoplasticity with intergranular strain, the Sanisand elastoplastic model in the version of 2004 and the recently proposed ISA (intergranular strain anisotropy) model have been inspected. The laboratory tests performed on Karlsruhe fine sand used in the present study are freely available on the homepage of the first author. The model predictions have been inspected for drained and undrained monotonic triaxial tests with various densities and pressures and for monotonic tests with a few number of un- and reloading cycles. The main focus, however, lies on undrained cyclic triaxial tests with either stress or strain control and with different densities, initial stresses and stress/strain amplitudes. The strengths and weaknesses of the different constitutive models for various test conditions are worked out.