焦散线法在压剪裂纹应力强度因子测量中的应用  

APPLICATION OF CAUSTIC METHOD TO DETERMINING STRESS INTENSITY FACTOR OF COMP RESSIVE SHEAR CRACK

作　　者：陈顺云[1] 许昭永[1] 杨润海[1] 赵晋明[1] 王赟赟[1] 熊秉衡[2] 王正荣[2] 

机构地区：[1]云南省地震局防灾研究所 [2]昆明理工大学激光研究所,中国昆明650051

出　　处：《地震学报》2005年第4期452-458,共7页Acta Seismologica Sinica

基　　金：国家重点基础研究专项经费(G1998040704);中国地震局双重项目(9691309020301);国家自然科学基金(46764010)共同资助.

摘　　要：从理论上分析了焦散线法在压剪裂纹应力强度因子测量中的应用,并利用焦散线法测量了有机玻璃标本中两组预制裂纹的应力强度因子.该方法可综合考虑裂纹面上的摩擦作用、裂纹之间的相互影响和外载荷.由于不需要了解边界条件,从而提高了测量的可信度.The caustic method is applied to compressive shear experiment and used to detect the stress intensity factors of cracks prefabricated on plexiglass sample. Loading, friction of crack planes and influence among cracks are not needed to know as they are combined and transformed into the caustic shadow used in detecting the stress intensity factor. Even boundary condition is not necessary. Therefore it is effective to determine the stress intensity factor of compressive shear crack.

关 键 词：焦散线 应力强度因子 压剪裂纹 

分 类 号：P315.8[天文地球—地震学]