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首页> 外文期刊>Composite Structures >Compressive behavior of pultruded composite plates with circular holes
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Compressive behavior of pultruded composite plates with circular holes

机译：带圆孔的拉挤复合板的压缩性能

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Compressive behavior of E-glass fiber/isophthalic polyester resin matrix pultruded composite sheet material is reported for two thicknesses. The effect of circular holes on Compressive strength and failure strain was also investigated. In the first series of tests, compression tests were performed with plate specimens without any hole. These specimens were instrumented with several pairs of back-to-back axial strain gages at different locations on the surface of the specimen to capture global buckling (if any) during compression. In the second series of tests, plate specimens with circular holes were prepared. A wide range of diameter to width ratio of D/W = 0.075-0.75 was chosen. The open-hole specimens were also instrumented with several strain gages (combination of single and strip gages) in and around the surface of the hole to determine the strain distribution, strain concentration factor, transverse and through-the-thickness normal strain, etc. A relationship between the Compressive strength and hole-diameter was established, and compared with the base line material properties. Finally, an attempt was made to determine the compressive failure initiation mechanisms and failure progression mechanisms in the presence of holes through sectioning and examining under a stereo microscope.
机译：报道了两种厚度的E-玻璃纤维/间苯二甲酸聚酯树脂基质拉挤复合片材的压缩行为。还研究了圆孔对抗压强度和破坏应变的影响。在第一个系列的测试中，对没有孔的板状试样进行了压缩试验。这些标本在标本表面的不同位置装有几对背对背轴向应变计，以捕获压缩过程中的整体屈曲（如果有）。在第二系列测试中，准备了带有圆孔的板状样品。选择大的直径与宽度之比D / W = 0.075-0.75。裸眼样品还在孔的表面及其周围装有多个应变计（单应变计和条形计的组合），以确定应变分布，应变集中系数，横向和整个厚度的法向应变等。建立了抗压强度与孔直径之间的关系，并将其与基线材料特性进行了比较。最后，尝试通过在立体显微镜下进行切片和检查来确定存在孔洞时的压缩失效引发机制和失效进展机制。

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