【摘要】 本文基于NSC（NetSectionCollapse，净截面垮塌）准则建立了拉弯组合受载条件下周向埋藏裂纹厚壁管的塑性极限载荷状态受力模型，并由此获得了周向裂纹管塑性极限载荷的通用解。利用通用解，考察了各主要因素对裂纹管承载能力的影响，并导出了在不同受载条件（纯拉、纯弯及拉弯组合载荷）下，不同裂纹构型（表面裂纹、埋藏裂纹、穿透裂纹及复杂裂纹）的周向裂纹管塑性极限载荷计算式。更多还原

【Abstract】 Based on the Net Section Collapse criteria, the analytical model of plastic limit load has been established, from which the general equations of plastic limit load have been derived for thick-wall pipes with circumferentially embedded crack under combined tensile and bending load in this paper. By using of the general equations, the main factors affecting loading capability of cracked pipes have been considered and different plastic limit load formulas have been deduced for pipes with different cracks such as surface crack, embedded crack, throughwall crack or complex crack under the pure tension or internal pressure, pure bending or combined load更多还原