WaiChing Sun's blog

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. 

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: 

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

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,

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.

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). 

Dear Colleagues,  

Dear all,

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

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

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)?