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PhD student or Postdoc Position available at Columbia University

A PhD or postdoc position is available in  computational multiscale modelling of geological materials at my research group.Interested candidates please visit http://gradengineering.columbia.edu/onlineapplication for general information. Answers of general admission question can be found at http://gradengineering.columbia.edu/frequently-asked-questions-2.  

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EMI San Diego Mini-symposium on Geomechanics (MS61)

Dear colleagues, 

We would like to invite you to submit abstracts for our mini-symposium (MS61) on Computational Geomechanics in the upcoming EMI conference (June 4-7, 2017) at San Diego. The scope of the mini-symposium is listed below:

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ICCM Berkeley MinisymposiumMS-054 Failure and instabilities in soft materials and geomaterials

Dear colleagues, 

I am writing to invite your contirbution to the mini-symposium on failure and instability in soft materials and geomaterials co-organized by myself, Joshua White, Pencheng Fu, Nikolaos Bouklas, and Christian Linder for the upcoming ICCM conference at Berkeley. The deadline for submission has extended to April 15th. More information can be found in the URL listed below. 

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Call for Abstracts: 7th ICCM Berkeley - MS-054 Failure and instabilities in soft materials and geomaterials

Dear colleagues, 

I am writing to invite your contirbution to the mini-symposium on failure and instability in soft materials and geomaterials co-organized by myself, Joshua White, Pencheng Fu, Nikolaos Bouklas, Wei Wang and Christian Linder for the upcoming ICCM conference at Berkeley. More information can be found in the URL listed below. 

http://www.sci-en-tech.com/ICCM/index.php/iccm2016/2016/schedConf/trackP...

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Faculty Position (Open Rank) in Department of Civil Engineering and Engineering Mechanics at Columbia University

COLUMBIA UNIVERSITY

School of Engineering and Applied Science

Faculty Position in Civil Engineering and Engineering Mechanics

The Department of Civil Engineering and Engineering Mechanics at Columbia University in the City of New York invites applications for a tenured or tenure-track faculty position. Appointments at the assistant professor, associate professor and full professor levels will be considered. 

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EMI Mini-symposium for Computational Geomechanics

Dear colleagues, 

I am writing to invite you to submit abstract to the Computational Geomechanics mini-symposium at the EMI Vanderbilt conference, from May 22th to 26th, 2016. The mini-symposium is co-organized by myself, Prof. Qiushi Chen, Prof. Xiayu Song, Dr. Joshua White, Prof. Richard Regueiro, Prof. Jose Andrade, Prof. Majid Manzaril and Prof. Ronaldo Borja.

The deadline for the abstract submission is Oct 15th, 2015. 

More information can be found at URL below: 

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Minisymposium 'MS 83: Multiscale Digital Rock and Granular Physics' at EMI 2015 at Stanford University

 

Dear colleagues, 

We would like to draw your attention to the minisymposium "Multiscale Digital Rock and Granular Physics" which we are organizing as part of the Engineering Mechanics Institute Conference to be held at Stanford June 16-19, 2015.

Detailed information on the congress is available at: http://www.emi2015.info

The deadline for the abstract submission is November 15, 2014. For details see http://www.emi2015.info/abstract-submission

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Call for Abstracts: EMII 2015 Stanford -Symposium on "Multiscale Digital Rock and Granular Physics"

Dear colleagues, 

We cordinally invite you to submit abstracts for our symposium on Multiscale Digitial Rock and Granular Physics in the upcoming EMI conference (June 16-19, 2015) at Stanford University. The scope of the conference is listed below. The due date for the abstract submission is 11/15/2014. Further details can be found at http://www.emi2015.info/

Best Regards,

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Journal Club Theme of September 2014: Numerical modeling of thermo-hydro-mechanical coupling processes in porous media

Thermo-hydro-mechanics (THM) is a branch of mechanics aimed to predict how deformable porous media behave, while heat transfer and fluid transport simultaneously occur in the pores filled by liquid and/or gas. Understanding these multi-physical responses is important for a wide spectrum of modern engineering applications, such as tissue scaffolding, geothermal heating, mineral exploration and mining, hydraulic fracture, energy piles, tunneling with frozen soil and nuclear waste storage and management.

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AGU Fall Meeting Session: Digital Rock Physics and 3D Printing

Dear Colleagues, 

 

   I want to invite you to submit abstracts to our session "Digital Rock Physics, 3D Printing and More" in the upcoming AGU Fall Meeting at San Francisco, December 15th to 19th, 2014. The details are listed below. 

 

Best Regards,

 

WaiChing

 

https://agu.confex.com/agu/fm14/webprogrampreliminary/Session3129.html

 

Session ID#: 3129

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Symposium on Geomaterials: Poromechanics and Failure at EMI International Conference, Hong Kong January 7-9,2015

Dear Colleagues, 

We are currently organizing a Symposium on Geomaterials: Poromechanics and Failure, for the upcoming EMI International Conference  "Mechanics for Civil Engineers Against Natural Hazards" in Hong Kong Polytechnic University, Hong Kong, from January 7th to 9th, 2015. 

We would like to invite submission for abstracts on modeling, characterization, and experimental studies on geomaterials for disaster prevention (landslides, earthquake) and for problems related to new energy applications (e.g. fracking, induced seismic events). 

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Lavrentiev phenomenon

Dear mechanicans,

    Can anyone explain to me what is Lavrentiev phenomenon? Thanks for your help.

 

WaiChing Sun

 

 

 

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representative elementary volume of non-local continuum

Dear mechanicans,

        For non-local continuum, is there a proper approach to determine the size of the REV in experiment? For the classical linear elastic continuum, one can measure the homogeneized stress and strain (or local averaged stress/strain)  and compute a homogeneized elastic constitutive tensor. However, I am not sure how to do it for non-local continuum, since the constitutive response is now sensititve to the gradient term. Any comment/suggestion is appreciated. 

Regards,

 WaiChing Sun

 

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Spectral decomposition

Dear all,

     Many numerical implementation of plasticity model uses spectral decomposition to represent the Cauchy stress, elastic strain,  such that stress update algorithm is written in the principal directions. As a result, I wonder what makes it benefical to write the stress update algorithm in spectral form? 

 Thanks,

WaiChing Sun

 

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Shape of particles in DEM

Many granular materials encountered in engineering practice are of irregular shapes that are not essentially smooth or rounded. However, in DEM, grains are idealized as spheres and ellipsoids and their surface are assumed to be sufficiently smooth. As a result, I wonder why there is no model of  irregular shapes and what is the difficulty on implementing such a model? Is there any recent work aimed to simulate grains of irregular shape? Thanks a lot. 

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potential functional for material exhibts non-associative elastoplastic response

Does anyone knows where I can find any paper discuss the existence of potential functinoal for materials that violate the maximum plastic dissipation principle (due to non-convex yield function and/or non-associately fluw rule)?

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diffuse and localized bifurcation modes of incompressible material

Does anyone know if it is possible for diffuse and localized bifurcation to happen simontanously in a incompressible slab? If so, which one is more likely to occur first?

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infinite finite elements

Hello, does anyone know where I can find more information about the infinite finite element or way to couple BEM/FEM to solve the problem in infinite 3D domain? Moreover, what is the difference between using a very long/large finite element and an infinite element?  Many thanks... 

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