声程差与应力强度因子的关系  

RELATIONSHIP BETWEEN ACOUSTIC-PATH DIFFERENCE AND STRESS INTENSITY FACTOR

作　　者：张忠平[1] 毕玉泉[1] 刘志毅[1] 杨尊袍[1] 车俊[1] 

机构地区：[1]空军工程大学,西安710038

出　　处：《力学与实践》2001年第4期27-29,共3页Mechanics in Engineering

摘　　要：基于弹性状态下力对材料声折射率及试件厚度的影响，推导了含裂纹的试件受力前后，超声纵波经其前后表面反射及透射时声程的变化，得到了应力强度因子与声程差的关系，为通过声程差的变化确定裂尖应力强度因子打下了基础．Based on the effects of stress on the acoustic refractive index and the thickness of the specimen in elastic state, the expressions of acousticpath difference for longitudinal wave that is reflected from the front (rear) surface or that passes through the specimen before and after the specimen is loaded are deduced. The relationship between acoustic-path difference and stress intensity factor is obtained, which may provide a basis for determining stress intensity factor through the change of acoustic-path difference.

关 键 词：弹性状态 声程差 应力强度因子 

分 类 号：O346.1[理学—固体力学]