Study on the basic characters of failure criterions of geotechnical material

Failure criterions are mathematical models got under given stress path or given condition of experiment,but would be used in general stress conditions.So it is worth to discuss the rationality and applicability of failure criterions.Based on numerical analysis,the strength parameter with different intermediate principle stress is comparatively analyzed.It is demonstrated that the generalized Mises criterion,deformation energy criterion and Bishop criterion can not reflect the intermediate principle stress’s effect effectively,while the SMP criterion and Lade-Duncan criterion can reflect it reasonable.Therefore,it is advised that the latter criterions can be used to analyses geotechnical problem with FEM software.