高分子材料の破壊特性解明に関する研究

抄録

The disposal of resin materials places a heavy burden on the natural environment. It is therefore necessary to improve the accuracy of strength design methods in order to minimize the amount of resin materials used. It is essential to accurately estimate the stress-strain relationship at arbitrary strain rates and temperatures. Methods for predicting the stress-strain relationship of plastic materials at arbitrary combinations of strain rate and temperature have not been sufficiently investigated. Therefore, we conducted tensile tests at room and elevated temperatures to clarify the effects of temperature and strain rate on Young's modulus and flow stress. Tensile tests showed that flow stress decreased with increasing strain rate and with increasing temperature. Young's modulus increased with increasing strain rate and decreased with increasing test temperature. Compared to the Young's modulus of PC, the Young's modulus of POM is slightly larger, and the strain rate dependence is more sensitive for POM than for PC.