§1 引言 大范围屈服断裂或简称弹塑性断裂(“普遍屈服断裂”及“屈服后断裂”也是常见的称法),指的是塑性区尺寸已经接近或显著超过裂纹尺寸的断裂,和高强度材料的小范围屈服断裂或低应力脆性断裂相似,也是工程结构中常见的断裂型 § 1 INTRODUCTION A wide range of yield fractures or simply called elastoplastic fractures (common yield fractures and post-yield fractures are also common notions) refer to fractures that have plastic zone sizes that are close to or significantly exceed the crack size, and high strength A small range of material yield fracture or low-stress brittle fracture similar to the engineering structure is also common fracture type