科研之友
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摘要
Te authors have investigated the anisotropic properties of plain weft knitted glass fibre fabric reinforced epoxy composites oriented at different off-axial angles and subjected to compressive and shear loads. The compression test results in the off-axial angles of 0 degrees, 30 degrees, 45 degrees, 60 degrees and 90 degrees indicated that the ultimate compressive strength and compressive modulus were greatest at 0 degrees but decreased at other off-axial angles. The compressive strength was higher than the tensile strength for the knitted fabric composite at any off-axial angle. On the other hand, the shear test results for the same off-axial angles showed that the ultimate shear strength and shear modulus were greatest at the off-axial angle of 60 degrees. A simple analytical model was applied to calculate the compressive strength at any off-axial angle, by using three critical strength parameters, i.e. the compressive strengths of 0 degrees and 90 degrees and the shear strength of 0 degrees. The theoretical strength data agree favourably with our experiments.
- 出版日期2001
- 单位同济大学
