摘要
本文利用边界配位法计算了直三点弯曲试样的应力强度因子K_1值.首次给出了a/w=0.05～0.25及a/w=0.80～0.95范围内的K_1值,并指出配位点m的选取为16～22计算结果最好.又指出该法用于浅裂纹时宜用较大的S'/W值;反之,深裂纹时,宜用较小的S'/W值.文章还对该法的收敛性等问题进行了讨论.
With boundary collocation method, the K_1 of three-point bend spe-cimens are calculated.The rang of calculation involves a/w=0.05～0.25 and a/w=0.80～0.95 which are not presented in any paper before.The solution is compared with E399-83.The variations in K_1 with m and S'/w are concerned, and the convergence of this method is discussed.
关键词
边界配位法
应力强度因子
裂纹
boundary collocation method, stress intensity factors
convergence
shallow crack
deep crack
