三城目安山岩と河津凝灰岩のクリープ特性と構成方程式

抄録

Special attention has been given in this study to measure the strain-time characteristics of samples in tertiary creep. Tertiary creep is signified by a continuous increase of strain rate. An interesting feature of this strain rate increase was found; The strain rate ata certain time in tertiary creep is inversely proportional to the time up to final failure.
A constitutive equation has been proposed based on the experimental results of creep.The simulation was carried out numerically and the calculated results were compared with the experimentally obtained stress-strain curves.The calculated ones well coincide with theexperimental. It should be emphasized that the proposed constitutive equation can be applied to not only pre-failure region but also post-failure region to some extent.