A study of the dissipative behavior of geomaterials undergoing large deformations

土壤和岩石等地质材料的响应的理解在解决岩土工程、环境工程、运输、建筑和施工技术中的各种问题中是至关重要的。 试图描述这种材料的响应是经典塑性和混合物理论的适应。 最近，一个通用的框架已经发展到研究不同类别的耗散过程，如滑移，孪生，相变，和损坏的聚合物网络。 该理论的主要特点是：它考虑到许多材料可以以一种以上的自然形态存在，在给定的时刻，响应由所有这些形态的变形梯度决定，使材料具有混合物的特性;当这些材料经历耗散过程时，基本的自然结构总是变化的;自然结构的演变通常由热力学标准决定;材料具有各种储存能量的手段;如果满足某些热力学标准，可以激活不同类型的响应;并且一旦特定机制被激活，可能需要规定该机制的演进。

Abstract9987677The understanding of the response of geomaterials such as soils and rocks is crucial in addressing a variety of problems in geotechnical engineering, environmental engineering, transportation, building and construction technology. Attempts to describe the response of such materials are adaptations of classical plasticity and mixture theory. Recently, a general framework has been developed to study a diverse class of dissipative processes such as slip, twinning, phase transition, and damage in polymer networks. The objective of this award is to generalize the theory further to include the dissipative response of geomaterials.The main features of the theory are: it takes into account the fact that many materials can exist in more than one natural configuration and that, at a given instant, the response is determined by the deformation gradient from all these configurations, giving the material its mixture-like characteristics; when these materials undergo dissipative processes, the underlying natural configurations invariably change; the evolution of the natural configurations is determined in general by a thermodynamic criterion; the material has various means of storing energy; different types of response can be activated if certain thermodynamic criteria are met; and once a particular mechanism is activated, it might be necessary to prescribe the evolution for the mechanism.