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.

本研究将固体力学的最新进展应用于剪切 本地化行为，并开发了一种经过验证的方法来预测 岩石和混凝土结构等地质材料的稳定性。 的 这项工作的主要目标是了解应变的物理过程 在地质材料的本地化，并提供了一个理论框架， 将实验室观察结果外推到实际应用中。 对岩石中的剪切局部化问题进行了全面的研究， 表现出非弹性变形敏感性的其他地质材料 和非弹性体积变化。 研究联合收割机理论分析 通过计算和实验工作。 改进的本构 多轴和非弹性变形的关系将制定 和框架将开发用于本构模型， 数字代码 具体地说，剪切破裂在压力敏感和 非弹性可压缩固体将根据模型进行研究 涉及均匀变形的分叉。 调查 然后将本地化与实验观察和 数值计算研究非弹性的性能 地质结构多轴变形本构关系