压力容器及管道环向表面裂纹复合加载下的延性断裂评定被引量：2

THE ESTIMATION OF DUCTILE FRACTURE OF TANGENTIAL SURFACE CRACKS IN PRESSURE VESSELS AND PIPES UNDER COMBINED LOADING

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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.

作者董亚民

机构地区清华大学工程力学系

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

分类号 TH49 [机械工程—机械制造及自动化] U178 [交通运输工程]

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