Performance of different stress-point algorithms for the integration of hypoplastic constitutive equations for geomaterials

Two classes of stress-point algorithms are used to integrate the incrementally non linear constitutive model CLoE, recently developed for granular materials. The paper compares the performance of the algorithms in terms of both accuracy and efficiency. An extensive program of numerical tests on some particular strain paths has been conducted in order to assess the effects of such variables as strain increment size and assumed error tolerance, as well as strain increment direction and initial stress state.