Multiaxial cyclic plasticity in accordance with 1D hyperbolic models and Masing criteria

Multiaxial cyclic plasticity in accordance with 1D hyperbolic models and Masing criteria
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符合一维双曲模型和 Masing 准则的多轴循环塑性

DOI:
10.1002/nag.2845
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发表时间:
2018
影响因子:
4
通讯作者:
Taborda, Ricardo
Taborda, Ricardo
中科院分区:
工程技术2区
文献类型:
--
作者:
Restrepo, Doriam;Taborda, Ricardo

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基于一维硬化函数的边界面塑性模型被广泛接受为描述不排水粘性土多轴循环特性的有效方法。然而,在某些条件下,这些模型可能会出现偏离预期的应力路径,这使得它们不足以满足传统的滞回规则。目前解决这个问题的方法是通过引入额外的内存变量来设置阈值,以帮助调整应力路径。本文提出了一种配方,实现了相同的目标,而不需要这样的额外的变量。建议的配方上操作的通用硬化功能下的多轴载荷,同时保持简单的纯偏边界面模型继承。此外,这里提出的方法允许实施Masing类型规则,以及使用减少因子来减轻大磁滞回线的过阻尼效应。在径向和非径向多轴载荷循环下,使用著名的双曲主干函数对该公式进行了测试,结果表明,该公式与参考解具有良好的一致性。
Bounding surface plasticity models based on one‐dimensional hardening functions are broadly accepted as a valid approach to represent the multiaxial cyclic behavior of undrained cohesive soils. However, under certain conditions, these models may exhibit deviations from the expected stress path. This makes them inadequate to meet traditional hysteretic rules. Current solutions to this problem impose thresholds to help adjust the stress path by introducing additional memory variables. This article presents a formulation that achieves the same goal without the need of such additional variables. The proposed formulation operates on a generic hardening function under multiaxial loading while preserving the simplicity inherited from pure deviatoric bounding surface models. In addition, the approach presented here allows the implementation of Masing‐type rules, as well as the use of reduction factors to mitigate the overdamping effects of large hysteresis loops. The formulation is tested using well‐known hyperbolic backbone functions under radial and nonradial multiaxial loading cycles, and it is shown to have good agreement with reference solutions.
DOI: 10.1785/0220120079
发表时间: 2012-11
影响因子: 3.3
作者:
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