Abstract
So far, many researchers have mainly studied the relationship between the principal stress ratio and the principal strain increment ratio of sand. However, it's not uniquely obtained for various stress conditions like b-value yet. The purpose of this paper is to reveal the fundamental stress-train relation ship of sand with inherent transverse isotropy, taking the effect of b-value and non-coaxiality into consideration. Towards this end, the monotonic loading tests with fixed principal stress axeswere carried out at the range of b-value from 0.0 to 1.0 using a large hollow cylindrical apparatus. Through the analysis of the experimental results, it is clarified that the relationship between the principal deviatoric stress increment and the principal deviatoric strain increment is more essential for sand even in the case that b-value is changed.
