论文部分内容阅读
本文用分解J积分为对称部分J_Ⅰ和反对称部分J_Ⅱ的方法,计算了四点复合型加载时单边裂纹梁的应力强度因子K_Ⅰ和K_Ⅱ,而J积分则通过有限元计算获得。与边界配位法所得结果的比较表明,分解J积分法是一种计算复合型应力强度因子的有效方法。计算结果还表明,四点复合型果的应因子K_Ⅰ和K_Ⅱ基本不受复合程度的影响,可以分别按弯矩和剪力进行算,并且建议了K_Ⅰ和K_Ⅱ的K程计算表式式。
In this paper, using the method of decomposition J-integral for the symmetric part J_I and the antisymmetric part J_II, the stress intensity factors K_I and K_II of the unilaterally cracked beam with four-point composite loading are calculated, and the J-integral is obtained by the finite element method. The comparison with the results obtained by the boundary coordination method shows that the decomposition J-integral method is an effective method for calculating the complex stress intensity factor. The calculation results also show that the factor K_I and K_II of the four-point composite fruit are not affected by the degree of recombination, and can be calculated according to bending moment and shear force respectively, and K-I and K_II K-calculation formulas are suggested.