Analytical and Experimental Study of Crack-Interface Interactions in Continuously Inhomogeneous Solids (CIM's)

利用连续非均质介质（CNM）的概念，对自然界（动植物组织和骨骼）和人工制造材料（复合纤维/基质区域）中的间相区域进行了建模。本项目为CNM概念的实验验证提供了测量。利用全场光学技术，研究了含有cnm的特定相间区域的静态裂纹行为。将实测应力分布和应力强度因子与现有理论模型进行了比较。对现有模型对关键非均匀性参数的敏感性进行了分析研究。本文还对CNMs中准静态裂纹扩展进行了实验和理论研究。＊＊＊

9712831 Lambros Modeling of interphase regions found both in nature (animal and plant tissue and bone) and artificially manufactured materials (composite fiber/matrix region) has been performed using the concept of Continuously Nonhomogeneous Medium (CNM). The present project provides measurements for the experimental validation of the CNM concept. Using full-field optical techniques, stationary crack behavior in specific interphase regions containing CNMs is investigated. The observed stress distributions and measured stress intensity factors are compared with existing theoretical models. An analytical investigation to determine the sensitivity of existing models to key nonhomogeneity parameters is also conducted. Experimental and theoretical investigation of quasi-static crack propagation in CNMs is also performed. ***