Hypoplastic model for sands with loading surface
Hypoplastic model for sands with loading surface
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DOI：
10.1007/s11440-012-0161-z
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发表时间：
2012-04
期刊：
影响因子：
5.7
通讯作者：
W. Fuentes;Theodor Triantafyllidis;A. Lizcano
中科院分区：
文献类型：
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作者：
W. Fuentes;Theodor Triantafyllidis;A. Lizcano
虽然砂土的亚塑性模型在单调加载下表现出良好的预测能力，但它们不能再现记忆效应，也不能预测循环加载下的过度塑性累积。为了克服这些问题，加载表面已被纳入一个发育不良的模型。该表面被覆盖并且具有两个硬化变量。从边界面塑性的概念被借用，以制定硬化函数。有了这个新的模型，可以描述一些显着的特点：该模型可以考虑塑性变形的积累，记忆效应提供了新的表面，并成功地模拟了应力诱导的各向异性效应在砂中观察到。给出了参数的简短校准指南，并给出了Hostun RF松散砂和Toyoura砂的一些模拟。
Although the hypoplastic models for sands have exhibited good predictive capability in monotonic loading, they are not able to reproduce memory effects and predict excessive plastic accumulation under cyclic loading. To overcome these issues, a loading surface has been incorporated into a hypoplastic model. This surface is capped and has two hardening variables. Notions from the bounding surface plasticity were borrowed in order to formulate the hardening functions. With this novel model, some salient features can be described: the model can account for the accumulation of plastic deformation, a memory effect is provided by the new surface, and stress-induced anisotropy effects observed in sands are successfully simulated. A short calibration guide of the parameters is given, and some simulations for Hostun RF loose sand and Toyoura sand are presented.