论文标题
在不饱和多孔介质中，更新的Lagrangian不饱和周围的围绕围环机学，以极度大变形
Updated Lagrangian unsaturated periporomechanics for extreme large deformation in unsaturated porous media
论文作者
论文摘要
不饱和的周围能力学是基于植入动力状态和有效力量概念的强大非局部孔刺力学。在先前的周围技术中，多孔培养基的坚实骨架采用了拉格朗日的总配方。在本文中，我们作为新的贡献，我们制定并实施了更新的拉格朗日不饱和周围的围环机学框架，用于在排水状态下（例如土壤柱倒塌）建模不饱和土壤中的极大变形。在这个新框架中，所谓的键相关的亚马概念可用于增强实心骨骼极大变形时的稳定性和准确性。变形构型中的稳定的非局部速度梯度用于从基于临界状态的粘膜塑料模型中更新有效的力状态。更新的Lagrangian Periporomechanics是通过用于高性能计算的明确NEWMARK方案来实现的。提供了数值示例，以证明更新的拉格朗日周围动力学的功效及其在在排水状态下对不饱和土壤柱塌陷进行建模的鲁棒性。
Unsaturated periporomechanics is a strong nonlocal poromechanics based on peridynamic state and effective force concept. In the previous periporomechnics the total Lagrangian formulation is adopted for the solid skeleton of porous media. In this article as a new contribution we formulate and implement an updated Lagrangian unsaturated periporomechanics framework for modeling extreme large deformation in unsaturated soils under drained condition, e.g., soil column collapse. In this new framework the so-called bond-associated sub-horizon concept is utilized to enhance the stability and accuracy at extreme large deformation of solid skeleton. The stabilized nonlocal velocity gradient in the deformed configuration is used to update the effective force state from a critical state based visco-plastic model for unsaturated soils. The updated Lagrangian periporomechanics is implemented numerically through an explicit Newmark scheme for high-performance computing. Numerical examples are presented to demonstrate the efficacy of the updated Lagrangian periporomechanics and its robustness in modeling unsaturated soil column collapse under drained condition.
