摘要
基于简单拉伸下的J积分全塑性解,建立了环向表面裂纹在拉伸、弯曲复合加载下的J积分近似表达式,表达式简捷明确,完全满足了工程评定的精度要求.文中还结合塑性失稳准则,建立了G因子表范例,使延性断裂评定更易于实现规范化.
Based on fully plastic solution of J integral under axial tension,an approximate expres-sion for solving the J integral of tangential surface cracks under combined loading of tensionand bending is established. This expression features explicitness and exactness,which per-fectly satisfies the demand for the accuracy of engineering estimation. The paper also gives anexample of a G factor table through the use of the plastic stability failure criterion,whichmakes it easier to realize the standardization of ductile fracture estimation.
出处
《内蒙古工业大学学报(自然科学版)》
1997年第3期51-59,共9页
Journal of Inner Mongolia University of Technology:Natural Science Edition
基金
国家"劳动部"攻关项目!"在役含缺陷压力管道安全评估关键技术研究"
关键词
环向表面裂纹
延性断裂
压力容器
塑性失稳
管道
tangential surface crack
fully plastic solution
ductile fracture
plastic stability failure
G factor