Abstract In this study, various fracture characteristics of plastic parts were experimentally investigated using newly designed specimens with 2 holes to observe the deformation and fracture behaviors of injection-molded plastic parts fabricated by short glass fiber (GF)-reinforced polypropylene (PP). This 2-hole tension (2HT) specimen affects the flow pattern of resin and the orientation of GF during the injection molding process, and various stress concentrations and distributions can be generated under a simple tensile load. The effects of rheological and mechanical variations of the resin on the deformation and fracture behavior of the test specimens were successfully investigated using the 2-hole tension specimens. In addition, it was confirmed that the non-uniform distribution of GF observed in the hole arrays region through the computed tomography (CT) scan is related to the crack propagation pathway, which ultimately affects the fracture behavior of the specimen.

中文翻译：

---

玻璃纤维分布对注射成型玻璃纤维填充聚丙烯的 2 孔拉伸试样力学和断裂行为的影响

摘要 在本研究中，使用新设计的 2 孔试样对塑料部件的各种断裂特性进行了实验研究，以观察由短玻璃纤维 (GF) 增强聚丙烯 (PP) 制造的注塑塑料部件的变形和断裂行为。这种 2 孔张力 (2HT) 试样会影响注塑过程中树脂的流动模式和 GF 的取向，并且在简单的拉伸载荷下会产生各种应力集中和分布。使用 2 孔拉伸试样成功地研究了树脂的流变和机械变化对试样变形和断裂行为的影响。此外，