AN ELASTO-VISCOPLASTIC CONSTITUTIVE MODEL WITH STRAIN-SOFTENING FOR SOFT SEDIMENTARY ROCKS

Simulation of long-term consolidation behavior of soft sensitive clay using an elasto-viscoplastic constitutive model

An elasto-viscoplastic interface model for investigating the constitutive behavior of nacre

In order to better understand the strengthening mechanism observed in nacre, we have developed an interface computational model to simulate the behavior of the organic present at the interface between aragonite tablets. In the model, the single polymer-chain behavior is characterized by the worm-like-chain (WLC) model, which is in turn incorporated into the eight-chain cell model developed by A...

An Enhanced Viscoplastic Constitutive Model for Semi-Solid Materials to Analyze Shear Localization

Semi-solid materials undergo strain localization and shear band formation as a result of granular nature of semi-solid deformation. In the present study, to analyze the shear localization, a unified viscoplastic constitutive model was developed for the homogeneous flow. Then, a linearized analysis of the stability performed by examining the necessary condition for the perturbation growth. For t...

A Growth Model for Porous Sedimentary Rocks

A growth model for porous sedimentary rocks is proposed, using a simple computer simulation algorithm. We generate the structure by ballistic deposition of particles with a bimodal size distribution. Porosity and specific surface area are calculated varying the proportion of small and larger particles. Permeability and it’s variation with porosity are studied. The fractal nature of the pore spa...

Constitutive Modeling of Rocks, Rock Joints and Rock Masses including Strain Softening Behaviour

The rocks are formed through very complex processes and the complex behaviour of rock masses is dominated by the planes of weaknesses . Rock mass consists of intact rock and discontinuities. Many rocks show strain softening behaviour under loads. In this paper, the constitutive models for intact rocks and rock joints are presented. These form the basis for the development of constitutive models...