Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (5): 731-735.DOI: 10.12068/j.issn.1005-3026.2016.05.026

• Resources & Civil Engineering • Previous Articles     Next Articles

Models of Hyperelasticity with Softening and Simulation of Strain Localization for Brittle Granular Materials

CHU Xi-hua, XIU Chen-xi, CHANG Jiang-fang   

  1. School of Civil Engineering, Wuhan University, Wuhan 430072, China.
  • Received:2014-09-22 Revised:2014-09-22 Online:2016-05-15 Published:2016-05-13
  • Contact: CHU Xi-hua
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Abstract: Two modified softening models are developed based on the Volokh softening model to consider the deformation and failure of granular material which is governed by shear deformation and failure. Different treatments to the volume strain energy and the shear strain energy are used in the two modified models, and a concept of the softening factor to indicate the degree of softening is proposed. Based on user-defined material (UMAT) of ABAQUS, the simulation is implemented. Numerical examples illustrated the capability and performance of the presented models in modeling strain localization and strain softening of granular materials.

Key words: granular materials, hyperelasticity with softening, strain softening, softening factor, strain localization

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