A cyclic UH model for sand

A cyclic UH model for sand
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沙子的循环 UH 模型

DOI:
10.1007/s11803-015-0019-0
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发表时间:
2015-06
影响因子:
2.8
通讯作者:
Wan Zheng
Wan Zheng
中科院分区:
工程技术3区
文献类型:
--
作者:
Wan Zheng

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在超固结粘土UH模型的基础上,提出了砂土循环弹塑性简化本构模型。所提出的模型具有以下特点。首先,为了描述应力诱导的各向异性在砂土中,旋转硬化规则被引入的屈服面轴的演变与发展的塑性偏应变在主应力空间。其次,通过在屈服函数中引入旋转轴斜率,建立了旋转轴与应力诱导各向异性的关系模型。屈服面的平坦度可由转动轴的斜率决定。最后,提出了一个修正的统一硬化参数,以纳入应力诱导各向异性。通过与试验结果的比较,验证了模型描述砂土循环响应的能力。
A simple cyclic elastoplastic constitutive model for sand is proposed based on the UH model for overconsolidated clay. The proposed model has the following features. First, in order to describe the stress-induced anisotropy in sand, a rotational hardening rule is introduced for the evolution of the yield surface axis with development of plastic deviatoric strain in the principal stress space. Second, the relationship between the rotational axis and stress-induced anisotropy is modeled by introducing the slope of rotational axis into the yield function. The flatness of the yield surface can be determined by the slope of rotational axis. Finally, a revised unified hardening parameter is proposed to incorporate the stress-induced anisotropy. The model capability in describing the cyclic response of sand is verified by comparing the simulations with available test results.
DOI: --
发表时间: 1989
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