積層GRP板の圧縮特性

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This paper is concerned with the time- and temperature dependences on the compressive properties of the plain fabric glass cloth reinforced laminates (GRP) and on the tensile properties of the epoxy resins used as the matrices of the GRP. The results obtained are summarized as follows: (1) The master curves of the relaxation moduli for the epoxy resins and the creep compliances for the GRP can be constructed, using their thermo-rheological simple properties. As for the time-and temperature shift factors, they are in good agreement each other quantitatively. (2) It was found that the relation between the relaxation moduli of the matrix and the creep compliances of the GRP at low temperatures in the short time range can be uniquely determined by the rule of mixture for viscoelastic materials, independent of the conditions of their circumstance such as time and temperature. (3) The above-mentioned results (1) and (2) are similar to those obtained in the previous paper concerning with the flexural properties of the unsaturated polyester resins and GRP containing these resins. Therefore. these results seem to hold generally in the stress-strain relations of various GRP under any load conditions. (4) The time-temperature shift factors of the epoxy resin and the unsaturated polyester resin can be approximately expressed by the two Arrhenius equations having different activation energies. The boundary temperatures of the two equations are nearly equal to the glass transition temperatures of the resins.
社団法人日本材料学会の論文
1975-04-15

積層GRP板の圧縮特性

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