摘要
将损伤力学与断裂理论相结合，通过对近裂尖瞬态应力场近似表达的推导，提出了岩体蠕变裂纹起裂与扩展的损伤力学分析理论，建立了岩体蠕变裂纹扩展的损伤累积模型．这一分析理论和模型可用于蠕变主裂纹起裂时间的预测以及裂纹时效扩展特征的分析．
In this paper,the author combines damage mechanics with fracture theory successfully to study and analyze the initiation and growth of creepcracks in rock mass. Based on the derivation of the approximate expression ofinstantaneous stress field near a main-crack tip,a damage mechanics analysistheory of creep-crack initiation and propagation is proposed for rock mass,and a damage accumulation model for creep-crack growth is established as well.The analysis theory and the model presented in this paper can be used to predict theinitiation time of creep maincrack,and to analyze the take-dependent characteristics of creep-crack in rock mass.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
1995年第2期141-146,共6页
Journal of Tongji University:Natural Science
基金
国家自然科学基金
关键词
蠕变
裂纹
损伤力学
岩体
断裂
Creep-crack Damage mechanics
Rock mass
Fracture
