摘要
本文运用最大拉应力理论,确定了岩石混凝土微裂区的大小、形状和特征尺寸,并讨论了在叠加上静水压力的情况下,微裂区的形状和大小及其对断裂韧性的影响,完善了断裂判据。提出了断裂韧性测试中必须注意的试样尺寸要求。
This paper defines the characteristic size and shape of the microcrack zone of the combined modes I and I of rock and concrete by using the maximum tension stress theory and discusses the effect of the microcrack zone size on fracture toughness,so that the fracture criteria are improved. The specimen size requirements of determining fracture toughness are also presented.
关键词
复合裂纹
微裂区
特征尺寸
combined mode crack
microcrack zone
characteristic size
