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Bearing strength of carbon epoxy laminates under static and dynamic loading

机译：静态和动态载荷下碳环氧层压板的承载强度

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摘要

An experimental study has been carried out to investigate both the static and dynamic bearing strengths of a pinned-joint carbon epoxy composite plate with [0°/45°/-45°/90°]_s and [90°/45°/-45°/0°]_s stacking configurations. The static and dynamic experiments have been carried out according to the ASTM D953 standards and ASTM STP 749, respectively [ASTM D 953-D, Standard Test method for Bearing Strength of Plastics, ASTM Designation. 342; Joining of Composite Materials, ASTM STP 749, American Society for Testing and Materials (1981) 131]. The ratio of the edge distance to the pin diameter (E/D), and that of the width to the pin diameter (W/D) of the specimens were varied to obtain the static bearing strength and the S-N fatigue curve. The experiments show that the static bearing strengths reach their upper limit when E/D and W/D ratios are equal to or greater than 4 for both [0°/ 45°/-45°/90°]s and [90°/45°/-45°/0°]_s stacking sequences. The fatigue strength, on the other hand, reduces by up to 65% as E/D and W/D ratios increase for both stacking configurations.
机译：进行了实验研究，以研究[0°/ 45°/ -45°/ 90°] _s和[90°/ 45°/- 45°/ 0°] _s堆叠配置。分别根据ASTM D953标准和ASTM STP 749 [ASTM D 953-D，塑料轴承强度的标准测试方法，ASTM名称]进行了静态和动态实验。 342;复合材料的连接，ASTM STP 749，美国测试和材料协会（1981）131]。改变试样的边缘距离与销钉直径（E / D）的比率和宽度与销钉直径（W / D）的比率，以获得静态轴承强度和S-N疲劳曲线。实验表明，当[0°/ 45°/ -45°/ 90°] s和[90°/ s]的E / D和W / D比等于或大于4时，静态轴承强度达到上限。 45°/ -45°/ 0°] _s的堆叠顺序。另一方面，随着两种堆叠结构的E / D和W / D比增加，疲劳强度最多降低65％。

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