STUDY ON ELASTO PLASTIC CONTACT MODEL BASED ON FINITE ELEMENT ANALYSIS

Aiming at the elasto- plasticity character of the elasto- plastic contact, this paper discusses the relationship among different constitutive models. Based on the equivalent Mohr- Coulomb yield criterion, its application in Ansys 18.0 is realized only by the conversion of materials' parameters. In the mean time, this paper also demonstrates the relationship between the converted material's parameters and the original material's parameters. And it is verified that it can replace Mohr- Coulomb yield criterion feasibly and can be used to simulate elasto-plastic contact materials by analyzing the example of an elastoplastic contact slope with obvious slip surface. Its calculation results are too small and conservative. Finally, this paper also proposes that the equivalent Mohr-Coulomb yield criterion should be used to simulate the elasto- plastic contact materials for slope engineering with obvious slid surface and high displacement accuracy requirement.