抄録
The tensile properties of E-glass were determined from the experimental results of fiber bundle testing under a high strain rate. The tests were performed using two types of experimental method. One is the tension-type split Hopkinson bar system, and the other is the universal high-speed tensile-testing machine. As the results, it was demonstrated that the tensile strength and fracture strain of E-glass fiber increased with the strain rate. The absorbed strain energy, therefore, significantly increased. It was also shown that the strain rate dependency of E-glass fiber tensile-strength was strongly affected by fiber diameter. In other words, the smaller diameter of E-glass fiber has the stronger strain rate dependency. Finally, the impact tensile strengths of high-strength glass and carbon fibers were investigated. It was confirmed that the tensile strength of the high-strength glass fiber also increased with the strain rate, but the tensile properties of carbon fiber were almost independent of the strain rate.
