抄録
Dependences on strain rate and temperature for the tensile strength of epoxy resin and unsaturated polyester resin reinforced with random-planar orientation of short glass fibers were studied.
In both composites, the tensile strength increased with increasing strain rate and was independent on the nature of interfacial treatment. This increment in tensile strength became slightly large with temperature. The strain rate-temperature reduction held for all composite samples made of epoxy and unsaturated polyester resins along with glass fibers treated with coupling and release agents. The strain rate and the temperature dependences of tensile strength could be estimated based on those dependences of the mechanical properties of matrix resins, the interfacial yield shear strength, and the critical fiber length. The strain rate and the temperature dependences of the tensile strength of the composites resembled the behavior of the interfacial yield shear strength rather than that of the tensile strength of matrix resins.
