摘要
通过对砂浆试样的材料变形响应和表面裂纹图象的同步观测实验研究、试样表面细观裂纹萌生和裂纹扩展图象信息的采集和量化方法的研究，探讨脆性固体材料的损伤状态与其宏观力学响应之间的关联。用本文提出的实验及其分析处理方法，可以得到砂浆、混凝土、岩石一类脆性固体材料在承载和变形过程中，表面裂纹扩展的定量结果。试样的表面裂损度代表了砂浆试样在承载和变形过程中表面裂纹扩展的情况，也在一定程度上反映了试样内部的损伤情况。
This study aims to investigate experimentally the cracking process synchronously with loading and deformation responses by testing concrete constituent, mortar. Cracks on the surface of specimen are observed by the Long Distance Microscopes (LDM) and recorded synchronously with loading and deformation response. The images of cracking are analyzed by the computer, and quantitative results for surface cracks evolution are obtained. Parameters for surface cracking and damage proposed in the paper showed the states of cracking in the real time of loading and deformation for the mortar.
出处
《实验力学》
CSCD
北大核心
1998年第2期231-236,共6页
Journal of Experimental Mechanics
基金
国家自然科学基金
江苏省自然科学基金
