ガラスクロス積層強化プラスチックスの面内剪断特性試験法の検討と非線形引張り挙動の推定

概要

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In order to obtain the in-plane shear stress-strain relations of Glass Fabric Reinforced Plastic Laminates (GFRP laminates) the following three experimental methods are considered : 1) Uniaxial tensile test at the angle of 45° to the warps of a fabric. (Petit and Rosens method.) 2) Pure shearing test with the combined biaxial tension-compression testing machine designed by the author. 3) Torsion test with a tubular specimen. The experimental results show that the 45°tensile test is effective to obtain easily the in-plane shear stress-strain relations of a GFRP laminate. Non-linear tensile stress-strain relationships are derived by using these inplane shear stress-strain relations and the stress-dependent elastic moduli reported in the previous paper. Uniaxial and biaxial tensile tests are carried out under constant stress ratios in the 15, 30 and 45° directions to the warps of the fabrics. The calculated values agree fairly well with the experimental results.
日本複合材料学会の論文