摘要
准脆性固体的灾变破坏如地震、滑坡、地下工程的失效等给人类生产和生活带来了巨大影响,由于其非线性演化过程的复杂性,这类灾变破坏的触发机理与预测方法一直是困扰工程界和科学界的难题.我们在对固体灾变破坏中的几个基本问题:灾变破坏的机理、无序非均匀效应、局部化行为和响应量的前兆特征进行了阐述,并对其研究进展和研究现状进行了评述,分析了准脆性固体损伤的非线性演化和局部化、灾变破坏前兆研究面临的困难和机遇.
Catastrophic rupture of brittle solids is very significant in, such as earthquakes, landslides, pillar failures, the movement of underground works and instability of structure. However, there is still a limited understanding of the triggering mechanism in natural catastrophic ruptures and their prediction. The principal purpose of this paper is to present a comprehensive demonstration on four key points, i.e., mechanism of catastrophic rupture, effects of heterogeneity, localization and physical precursors. Based on the analysis of the progress on them, we propose the current difficulties and potential strategies in research of damage nonlinear evolution, localization and catastrophic precursors.
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2014年第12期1262-1274,共13页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家重点基础研究发展计划资助项目(编号:2013CB834100)
关键词
灾变破坏
非均匀
局部化
前兆
地震
catastrophic rupture, heterogeneous, localization, precursor, earthquake
