My PhD student Kun Wang has received the Mindlin Scholarship from the Fu Foundation School of Engineering and Applied Science of Columbia University. The Mindlin scholarship is given to a graduate student in the Columbia Engineering school who demonstrates superior achievement, integrity, curiosity and creativity. The Mindlin scholarship is established by the Mindlin family and the SEAS in honor of the three Mindlin brothers (Eugene as an engineer and businessman, Raymond as a scientist and professor at Columbia, and Rowland as a physician and public health administrator).
Below is the list of published work Kun finished during his PhD study with our group. Congratulations, Kun! Well deserved!
Prof. Sun has won the NSF CAREER award for his project, “Deep-reinforcement-learning-enhanced computational failure mechanics across multiple scales.”
My PhD student Kun Wang has successfully defended his PhD qualification exam. His PhD thesis proposal "From multi-scale modeling to meta-modeling of poromechanics problems" is examined by the committee consisted of Santiago and Roberta Calatrava Family Professor George Deodatis (CEEM), and Fu Foundation Professor Qiang Du, and myself. In the proposed meta-modeling approach, Kun proposes a new method in which one uses a directed multi-graph to represent mechanics knowledge and then uses AI to form a directed graph that leads to a constitutive law. Furthermore, the AI also learns to improve its skill to write constitutive laws through practicing. Unlike previous ML which often leads to blackbox predictions and demands large amount of data, the resultant model is interpretable by human, can be trained with the same amount of data as the hand-crafted counterpart and yet much faster than sub-scale simulations.
We thank all the committee members for their insightful questions, comments and time.
Kun Wang joined the research group in 9/2014, first as master student, then advanced to PhD in 1/2015. His thesis focuses on the multiscale modeling and meta-modeling of porous media across multiple length and temporal scales. He has published 7 papers (including 4 CMAME papers) of which he served as the first author to 6 of them. His work is supported by ARO, AFOSR, DOE, NSF and Columbia Engineering Seed Grant. His achievement and contribution to our research group are exemplified in the published papers, which are listed below. His recent work on data-driven multiscale modeling of porous media has been awarded him a travel grant to present at the Santa Fe Meshless workshop and selected as one of the finalists in the WCCM poster competitions (along with two other group members SeonHong Na and Eric Bryant). The slides of the qualification exam can be found at the bottom of this post.
Congratulations for advancing to the final chapter of your PhD study, Kun!
Attended the ICE Award Ceremony at the Institution of Civil Engineers headquarter. I am so honored to receive the Zienkiewicz Medal. Also great to meet Prof. David Potts from Imperial College London again. What a day! #CUSEAS #Zienkiewicz #geomechanics #ICE #geotechnics
Our team member and PhD student SeonHong Na passed his PhD candidacy exam. His PhD proposal entitled "Multiscale thermo-hydro-mechanical-chemical (THMC) coupling effects for fluid-infiltrating dual-porosity crystalline rock: theory, implementation, and validation" is examined by the committee consisted of Professor Jacob Fish, Professor Hoe Ling, Professor Jeffery Kysar. We thank all the committee members for their insightful questions, comments and time. Congratulations for this well-deserved achievement, SeonHong! Good luck for your final PhD defense!
PhD student SeonHong Na won Dongju Lee '03 Memorial Award and the Teaching Assistant Excellence Award
It is my honor to report that our team member PhD student SeonHong Na is selected as the recipient of two awards in the CEEM department annual dinner. The Dongju Lee memorial award is given in recognition of SeonHong's superior achievement and in honor of the integrity, curiosity and creativity. The Dongju Lee Memorial Award and Memorial Lecture were established with a generous contribution from the Lee Family.
Our proposal titled "Modeling the High-rate Responses of Wetted Granular Materials Across Scales and the Third-party Replicable Validation Exercises Utilizing 3D Printers" is selected to receive the 2017 AFOSR Young Investigator Award. The YIP is open to scientists and engineers at research institutions across the United States who received Ph.D. or equivalent degrees in the last five years and who show exceptional ability and promise for conducting basic research.The objective of this program is to foster creative basic research in science and engineering, enhance early career development of outstanding young investigators, and increase opportunities for the young investigators to recognize the Air Force mission and the related challenges in science and engineering.
The press release can be found in the URL below:
Graduate student SeonHong Na awarded 2nd place in ASCE Engineering Mechanics Institute Student Paper Competition
2nd year graduate student SeonHong Na in our research group has awarded 2nd place in the Student Paper Competition in Inelasticity and Multiscale Behavior Committee at Engineering Mechanics Institute Conference at Vanderbilt University, Nashville, TN. His work is on computational cryo-mechanics of frozen soil at finite deformation range. The committee has first chosen 5 finalists among all student paper submitted to the committee. The selected finalists are then given the opportunity to present in front of the judge and the top three papers are selected. SeonHong Na's work is selected by the judge as the top three papers among all of the submitted work to the Inelasticity and Multiscale Behavior Committee. Previously, former student of the research group Dr Yang Liu (now at MIT) has also won the Best Poster Competition at USNCCM San Diego.
Congratulations SeonHong for this wonderful achievement!
Dr. Sun received recognition for his work with the Albany development team at Sandia National Laboratories.
Professor Sun received recognitions for his work as a part of the research team that develops Albany v2.0, a computational mechanics code developed by research staffs at Sandia National Laboratories and collaborators from Universities. The research project is lead by Dr. Andrew Salinger from Sandia National Laboratories. Dr. Sun’s involvement in this project includes the theoretical development and implementations of a number of finite strain models for poromechanics and thermo-hydro-mechanics problems, and the implementation of a hydrogen embrittlement model derived by his collaborators. Prof. Sun’s work on Albany has resulted in 6 journal articles [1-6], 5 of which he served as the first author. More information can be found in the publication listed below.
1. Mota, W.C. Sun, J.T.Ostein, J.W. Foulk III, K.N. Long, Lie-Group interpolation and variational recovery for internal variables, Computational Mechanics, 52:1281-1299, doi:10.1007/s00466-013-0876-1, 2013. [PDF] [Bibtex]
2. W.C. Sun, J.T. Ostien, A.G. Salinger, A stabilized assumed deformation gradient finite element formulation for strongly coupled poromechanical simulations at finite strain, International Journal for Numerical and Analytical Methods in Geomechanics, 37(16):2755-2788, doi:10.1002/nag.2161, 2013. [PDF] [Bibtex]
3. W.C. Sun, M.R. Kuhn and J.W.Rudnicki, A multiscale DEM-LBM analysis on permeability evolutions inside a dilatant shear band, Acta Geotechnica, 8(5):465-480, doi:10.1007/s11440-013-0210-2, 2013. (The authors received the Caterpillar Best paper prize in the year of 2013) [PDF] [Bibtex]
4. W.C. Sun, Q. Chen, J.T. Ostien, Modeling hydro-mechanical responses of strip and circular footings on saturated collapsible geomaterials, Acta Geotechnica, 9(5):903-934, doi:10.1007/s11440-013-0276-x, 2014. [PDF] [Bibtex]
5. W.C. Sun, A. Mota, A multiscale overlapped coupling formulation for large deformation strain localization, Computational Mechanics, 54(3):803-820, doi: 10.1007/s00466-014-1034-0, 2014. [PDF] [Bibtex] [Erratum]
6. W.C. Sun, A stabilized finite element formulation for monolithic thermo-hydro-mechanical simulations at finite strain, International Journal for Numerical Methods in Engineering, 103(11):798-839, doi:10.1002/nme.4910, 2015. [PDF] [Bibtex]
News about Computational Poromechanics lab at Columbia University.