Two different short glass fiber reinforced PPS composites with different fibers content (30% and 40% in weight) were tested upon static and fatigue loading at room temperature. The material with 40% fiber content was also tested at high temperature (160 °C) both in static and fatigue condition. All the specimens were injection molded directly in standardized dog-bone geometry without further cutting or machining. Static tests at three different displacement rates were performed in order to calculate the main static mechanical properties and to observe the strain-rate sensitivity. Fatigue tests for both materials were performed in load control with 0.1 load ratio. The S-N curves are presented in semi-logarithmic coordinates. Some derived cyclic parameters such as the cyclic mean strain and cyclic modulus were calculated to observe the capability to describe the input test variables effect on the damage mechanism. The fracture location distribution along the specimen longitudinal axis were observed and the transverse cross-sections were analyzed by means of optical microscopy in order to correlate the micro-structure and the mechanical properties.

中文翻译：

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注塑短纤维增强 PPS 复合材料的静态和疲劳行为：纤维含量和高温影响

两种不同的短玻璃纤维增​​强 PPS 复合材料具有不同的纤维含量（重量百分比分别为 30% 和 40%），在室温下进行静态和疲劳负载测试。纤维含量为 40% 的材料还在高温（160°C）下进行了静态和疲劳条件下的测试。所有样品均直接以标准化的狗骨几何形状注塑成型，无需进一步切割或机加工。为了计算主要静态力学性能并观察应变率敏感性，进行了三种不同位移速率下的静态试验。两种材料的疲劳测试均在负载比为 0.1 的负载控制下进行。 SN 曲线以半对数坐标表示。计算了一些导出的循环参数，例如循环平均应变和循环模量，以观察描述输入测试变量对损坏机制影响的能力。观察沿试样纵轴的断裂位置分布，并通过光学显微镜分析横截面，以将微观结构和力学性能联系起来。