In this work, a comprehensive experimental investigation was carried out to characterise the quasi-static tensile and compressive behaviour of notched and plain specimens made of 40% wt. glass fibre-Polyphenylenesulphide (40GF-PPS) short fibre reinforced composite.

To this end, plain and notched specimens (with notch radius ranging from 0.25 mm to 10 mm) were manufactured with two different fibre orientation angles (0° and 90°) and tested under tension and compression, allowing to observe the effect of the notch root radius and the notch geometry. In addition, a careful analysis was carried out both at the macroscopic and microscopic level to compare the fracture behaviour of plain and notched specimens. Finally, a Generalised-Stress-Intensity-Factor-based approach was adopted to correlate the tensile strength of notched specimens. On the contrary, the compressive strength of the notched samples was rationalised in terms of the nominal net-stress, thanks to the limited notch sensitivity exhibited by the material during the compression tests.

在这项工作中，进行了全面的实验研究，以表征由40％wt。玻璃纤维-聚苯硫醚（40GF-PPS）短纤维增强复合材料。

为此，以两个不同的纤维取向角（0°和90°）制造了平整和有缺口的样本（缺口半径为0.25 mm至10 mm），并在拉伸和压缩下进行了测试，从而观察了缺口的影响根半径和槽口几何形状。另外，在宏观和微观两个层面都进行了仔细的分析，以比较平面试样和缺口试样的断裂行为。最后，采用基于广义应力强度因子的方法来关联缺口试样的拉伸强度。相反，由于材料在压缩测试过程中表现出有限的缺口敏感性，因此根据名义净应力合理化了缺口样品的抗压强度。