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On the influence of pre-stress on the mechanical properties of a unidirectional GRE composite

机译：预应力对单向GRE复合材料力学性能的影响

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摘要

The effect of composite pre-stress on the mechanical properties of E-glass fibre in an epoxy resin has been investigated theoretically and experimentally. Experimental results have been obtained for pre-stresses (0, 25, 50, 75, 100, 200 MPa) at each of three fibre volume fractions (0.35, 0.45, 0.6). A theoretical model has been developed to predict the effect of composite pre-stress on the pre-load strain in fibre and matrix, tensile strength and elastic modulus of the composite. The results show that pre-tensioning of the fibre during fabrication increases the tensile strength and elastic modulus of the composite. This increase has been found to be a function of composite pre-stress and fibre volume fraction. Good agreement has been obtained between the theoretical results and experimental measurements.
机译：从理论和实验上研究了复合预应力对环氧树脂中电子玻璃纤维力学性能的影响。在三个纤维体积分数（0.35、0.45、0.6）中的每一个下，获得预应力（0、25、50、75、100、200 MPa）的实验结果。建立了理论模型来预测复合材料的预应力对纤维和基体中的预紧应变，复合材料的拉伸强度和弹性模量的影响。结果表明，在制造过程中对纤维进行预拉伸可提高复合材料的拉伸强度和弹性模量。已经发现这种增加是复合材料预应力和纤维体积分数的函数。在理论结果和实验测量之间已获得良好的一致性。

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