Experimental and Theoretical Model Study of Response and Failure Modes of Brittle Solids with Microdefects

该研究解决了脆性固体损伤力学中的一个关键问题 并计划开发一种利用微观力学概念的新方法， 了解脆性材料的断裂和损伤特性 包括粒状固体和混凝土。 研究计划包括 非弹性响应的实验和理论研究， 包含特定微观缺陷的材料的失效机制。 将进行受控模型实验， 产生微裂纹的缺陷的其他特征， 规定了非弹性流动。 此过程将允许 观察了热处理过程中显微组织的演变， 变形 这将提供定量估计， 表征应力和应变的宏观参数。 模型 将利用严格的力学进行分析。 理论 模型将通过实验观察来开发和验证。 主要研究者是国际公认的专家， 脆性和粒状固体的断裂机理。 该机构 一个优秀的实验室设施进行这项研究。 建议给予奖励。

The research addresses a key issue in damage mechanics of brittle solids and plans to develop a new approach utilizing micromechanics concepts to understand the fracture and damage characteristics of brittle materials including granular solids and concrete. The research plan includes experimental and theoretical investigations of inelastic response and failure mechanisms of materials which contain specific microdefects. Controlled model experiments will be conducted where the geometry and other characteristics of the defects that produce micro cracking and inelastic flow are prescribed. This procedure will allow the observation of the evolution of the microstructure in the course of deformation. This will provide quantitative estimates of the macroscopic parameters which characterize stresses and strains. Model analyses will be performed utilizing rigoroud mechanics. Theoretical models will be developed and verified by experimental observations. The Principal Investigator is in intetnationally recognized expert in fracture mechanism of brittle and granular solids. The institution has an excellent laboratory facility to conduct this research. An award is recommended.