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

连续非均匀固体 (CIM) 中裂纹界面相互作用的分析和实验研究

• 批准号: 9712831
• 负责人: John Lambros
• 金额: $ 24.39万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-09-15 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9712831&HistoricalAwards=false
• 关键词: Analytical; Experimental; Study; Crack; Interface

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. ***

9712831利用连续非均匀介质的概念，对自然界(动植物组织和骨)和人造材料(复合纤维/基质区域)中存在的界面区域进行了Lambros建模。本项目为CNM概念的实验验证提供了衡量标准。利用全场光学技术，研究了含碳纳米管的特定相界面区的静态裂纹行为。将观测到的应力分布和测量的应力强度因子与现有理论模型进行了比较。还进行了分析研究，以确定现有模型对关键非均匀参数的敏感度。对碳纳米管中的准静态裂纹扩展进行了实验和理论研究。***