Sun Research Group at Columbia University
  • Home
  • News
  • PI
  • Team Members
  • Publications
  • Research
  • Teaching
  • Software & Data
  • Presentations
  • Recruitment & Advice
  • ML for Mechanics
  • Home
  • News
  • PI
  • Team Members
  • Publications
  • Research
  • Teaching
  • Software & Data
  • Presentations
  • Recruitment & Advice
  • ML for Mechanics

Presentation at the 2014 John Rudnicki Symposium at SES Meeting in celebration of his Society of Engineering Science Medal

10/9/2014

0 Comments

 
Modeling deformation bands in thermal softening and fluid infiltrating porous solids at finite strain

WaiChing Sun, Columbia University, New York, USA
Claudio Tamagnini, Universita degli Studi di Perugia, Perugia, Italy

Onset and modes of deformation bands are often influenced by non-mechanical loading triggered by seepage of pore fluid and thermal effects. Experimental evidence has established that temperature changes can alter the shape and size of the yield surface, and cause shear band to form in geomaterials that are otherwise stable. Understanding this thermo-hydro-mechanical responses are important for many engineering applications, such as carbon dioxide storage and extraction of hydrocarbon in which hot or cool fluid are often injected into deep porous rock formations. The purpose of this research is to simulate this coupled process using a thermoporoplasticity model with extended hardening rules. A key feature of this model is that evolution of internal variables are governed by both the plastic dissipation and the change of temperature. An adaptively stabilized monolithic finite element model is proposed to simulate the fully coupled thermo-hydro-mechanical behavior of porous media undergoing large deformation. We first formulate a finite-deformation thermo-hydro-mechanics field theory for non-isothermal porous media. The corresponding (monolithic) discrete problem is then derived adopting low-order elements with equal order of interpolation for the three coupled fields. A projection based stabilization procedure is designed to eliminate spurious pore pressure and temperature modes due to the lack of the two-fold inf-sup condition of the equal-order finite elements. To avoid volumetric locking due to the incompressibility of solid skeleton, we introduce a modified assumed deformation gradient in the formulation for non-isothermal porous solids. Finally, numerical examples are given to demonstrate the versatility and efficiency of this model.

0 Comments



Leave a Reply.

    Group News

    News about Computational Poromechanics lab at Columbia University.

    Categories

    All
    Invited Talk
    Job Placements
    Journal Article
    Presentation
    Special Events

    Archives

    December 2022
    November 2022
    August 2022
    July 2022
    May 2022
    April 2022
    March 2022
    December 2021
    November 2021
    October 2021
    September 2021
    August 2021
    July 2021
    June 2021
    May 2021
    April 2021
    March 2021
    February 2021
    January 2021
    October 2020
    August 2020
    July 2020
    June 2020
    May 2020
    February 2020
    January 2020
    December 2019
    September 2019
    July 2019
    June 2019
    May 2019
    April 2019
    March 2019
    February 2019
    December 2018
    October 2018
    September 2018
    August 2018
    July 2018
    June 2018
    May 2018
    April 2018
    March 2018
    January 2018
    December 2017
    November 2017
    October 2017
    September 2017
    August 2017
    July 2017
    June 2017
    May 2017
    April 2017
    March 2017
    February 2017
    January 2017
    December 2016
    November 2016
    October 2016
    May 2016
    April 2016
    March 2016
    February 2016
    January 2016
    November 2015
    October 2015
    September 2015
    August 2015
    July 2015
    June 2015
    May 2015
    March 2015
    February 2015
    January 2015
    December 2014
    November 2014
    October 2014
    September 2014
    August 2014
    July 2014
    June 2014
    May 2014
    April 2014
    March 2014
    February 2014
    January 2014
    November 2013
    September 2013

    RSS Feed

Contact Information
Prof. Steve Sun
Phone: 212-851-4371 
Fax: +1 212-854-6267
Email: wsun@columbia.edu
Copyright @ 2014-2022.  All rights reserved.