The current analyses present results of running ductile fracture propagation in high strength X100 line pipe steels under the influence of anisotropy. Mechanical anisotropy is commonly available in pipe products as a result of the manufacturing process, especially, those subjected to hot/cold-worked deformation. The outcomes of the present analyses show that its effect on the behavior of running ductile fracture in cracked pipes undergoing depressurization is meaningful. For instance, the Crack-Tip Opening Angle (CTOA) not only exhibits a strong dependence to the pipe’s diameter size, but also to the material’s anisotropy nature when compared to a hypothetical isotropic material. Moreover, laboratory scale tests such as those performed on Battelle Drop Weight Tear (BDWT) samples provide useful information about initiation of ductile crack propagation when the anisotropy features are taken into account in the material description.

当前的分析结果表明，在各向异性的影响下，高强度X100管线钢在运行过程中发生了延性断裂扩展。由于制造过程的缘故，在管道产品中通常会出现机械各向异性，特别是那些经受热/冷加工变形的管道。本分析的结果表明，其对正在经历减压的裂化管中的韧性延展断裂行为的影响是有意义的。例如，与假设的各向同性材料相比，裂纹尖端的开口角度（CTOA）不仅对管子的直径大小有很强的依赖性，而且对材料的各向异性也有很强的依赖性。而且，