Localization of Deformation and Inelastic Deformation of Geomaterials

岩土材料的变形和非弹性变形的局部化

• 批准号: 8612876
• 负责人: John Rudnicki
• 金额: $ 9.92万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-12-01 至 1990-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8612876&HistoricalAwards=false
• 关键词: Localization; Deformation; Inelastic; Geomaterials

The research applies recent solid mechanics advances to shear localization behavior and develops a verified approach to predict the stability of geo-materials such as rock and concrete structures. The main goal of this work is to understand the physical process of strain localization in geo-materials and provide a theoretical framework for the extrapolation of laboratory observation to applications. Comprehensive studies are conducted on shear localization in rocks and other geo-materials that exhibit sensitivity of inelastic deformation and inelastic volume change. The studies combine theoretical analyses with computational and experimental work. Improved constitutive relations for multiaxial and inelastic deformation will be formulated and a framework will be developed for the use of constitutive models in numerical codes. Specifically, shear rupture in pressure-sensitive and inelastically compressible solids will be investigated based on models involving bifurcation from homogeneous deformation. The investigations of localization will then be used with experimental observations and numerical calculations to study the performance of inelastic constitutive relations for multiaxial deformation of geo-structures.

该研究将最新的固体力学进步应用于剪切定位行为，并开发了一种验证的方法来预测岩石和混凝土结构等地质物质的稳定性。 这项工作的主要目的是了解地理物质中应变定位的物理过程，并为推断实验室观察到应用的理论框架提供了一个理论框架。 全面的研究是关于在岩石和其他地质材料中表现出非弹性变形和非弹性体积变化敏感性的剪切定位的。 研究将理论分析与计算和实验工作相结合。 将制定用于多轴和非弹性变形的构成关系，并将为在数值代码中使用本构模型而开发一个框架。 具体而言，将根据涉及均匀变形的分叉的模型研究压力敏感和不可压缩固体中的剪切破裂。 然后，对定位的研究将用于实验观测和数值计算，以研究地理结构多轴变形的非弹性组成关系的性能。