A thermodynamically consistent two surface/bubble thermo-mechanical model considering thermal and mechanical cyclic behaviour of fine-grained soils

Ali Golchin, Philip James Vardon*, Michael Anthony Hicks

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Downloads (Pure)

Abstract

The formulation of a two surface/bubble thermo-mechanical constitutive model consistent with the principles of thermodynamics is presented. This allows plastic deformations inside the outer yield surface, resulting in a smooth stress–strain prediction and progressive cyclic deformations. This is achieved by the translation of the inner yield surface (also known as the bubble surface) with the stress state of the soil, inside the outer yield surface, by using a kinematic rule. The constitutive equations, including the hardening rules, are derived by specifying a Gibbs-type energy potential and a rate of dissipation potential function, ensuring thermodynamic consistency. The kinematic rule is divided into isothermal and non-isothermal parts. With the isothermal component, the model is capable of capturing the hysteresis behaviour of soils during cyclic mechanical loading. With the non-isothermal part, the model is able to predict the shakedown behaviour of soils observed when they are subjected to heating–cooling cycles. The performance of the model is compared with various experimental data for isothermal and non-isothermal conditions, and is shown to be in good agreement.

Original languageEnglish
Article number111847
Number of pages26
JournalInternational Journal of Solids and Structures
Volume254-255
DOIs
Publication statusPublished - 2022

Keywords

  • Cyclic
  • Elastoplasticity
  • Geomechanics
  • Thermodynamics of solids
  • Thermomechanical
  • Thermoplasticity

Fingerprint

Dive into the research topics of 'A thermodynamically consistent two surface/bubble thermo-mechanical model considering thermal and mechanical cyclic behaviour of fine-grained soils'. Together they form a unique fingerprint.

Cite this