摘要
本文对边界元方法(BEM)中面力不连续性,集中力的处理等提出了改进方法,提高了计算效率和计算精度,在此基础上利用边界元直接法计算了二维弹性断裂问题的J积分和应力强度因子,计算结果表明,用BEM通过J积分计算应力强度因子比用有限元方法省时、高效,应用潜力很大。
BEM as a numerical method started from 1960's. It has many special advantages over FEM and some particular difficulties. In this paper, the treatment methods of the discontinuous tractions and point loads on boundary are improved. The computation efficiency and precision are increased. The J-integral and SIF are calculated by the direct BEM on these improvements.The computation results indicate that the J-integral and SIF calculation by' BEM is more economical and efficient than by FEM and has great potentialities for utilization. 晻-?. . ?? . - ? .
