摘要
工程结构的失效起始于底层 ,即从材料中的孤立的空洞成核开始 ,形成微裂纹 ,发展为宏观裂纹 ,直至整个结构破坏 ,因此分布式损伤和尺度效应在工程结构损伤问题中显得十分重要 .本文简要介绍了一种处理分布式损伤 (微损伤 )的方法———“统计细观损伤力学” ,以及基于该方法讨论了分布式损伤的演化规律 .对于跨尺度失效问题的尺寸效应 ,通过分析应力波引起的损伤问题 (存在 2个反映尺度效应的Deborah数 ) 。
The failure of engineering structures begins at the lower levels of material microstructures from micro_void or micro_crack to macro_crack, and then to the total structural failure. Therefore distributed damages and scale effects are very important in engineering structural failures. 'Statistical meso damage mechanics', an effective method in dealing with distributed damages, is introduced in this paper. The development of the distributed damages and the scale effects of the damage induced by stress waves are also discussed. There are two Deborah numbers and the key to the scale effects in the problems is the coupling between the scales.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第11期11-14,共4页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目 (10 172 0 84 )
