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来理解脆性材料（包括颗粒固体和混凝土）断裂和损伤特征的新方法。研究计划包括对含有特定微缺陷的材料的非弹性响应和破坏机制进行实验和理论研究。控制模型实验将在规定产生微裂纹和非弹性流动的缺陷的几何和其他特征的情况下进行。这种方法可以观察到变形过程中微观结构的演变。这将提供表征应力和应变的宏观参数的定量估计。模型分析将使用严格的力学进行。理论模型将通过实验观察得到发展和验证。首席研究员是国际公认的脆性颗粒固体断裂机理方面的专家。这个机构有很好的实验室设备来进行这项研究。建议颁发奖项。

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.