TIME-DEPENDENT BEHAVIOR OF CO₂-HYDRATE-BEARING SEDIMENTS AND APPLICATION OF ELASTO-VISCOPLASTIC CONSTITUTIVE MODEL

Geomechanical Constitutive Modelling of Gas-hydrate- Bearing Sediments

In this work and in order to consider theoretically the effect of gas hydrates on the mechanical properties of their host sediments, hydrate fraction was introduced as a state variable in the framework of a Critical State model. For the proposed model, the process of de-structuration and softening of natural clay was considered as a proxy for the gas-hydrate-bearing-sediments behaviour. The dev...

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...

A Constitutive Model for Time-Dependent Behavior of Clay

A new elastic-viscoplastic (EVP) constitutive model is proposed for the analysis of time-dependent behavior of clay. The proposed model is based on the bounding surface plasticity and the concept of viscoplastic consistency framework to establish continuous transition from plasticity to rate dependent viscoplasticity. Unlike the overstress based models, this model will meet the consistency cond...

effect of postharvest application of chitosan and calcium chloride on decay and quality attributes of sweet cherry

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