EMI, the Engineering Mechanics Institute of ASCE, announces the winners of prestigious mechanics awards:
https://www.asce.org/engineering-mechanics/news/20200403-emi-mechanics-award-recipients/
https://www.asce.org/engineering-mechanics/engineering-mechanics-institute/
De Baets, S., Denbigh, T.D.G., Smyth, K.M. et al. Micro-scale interactions between Arabidopsis root hairs and soil particles influence soil erosion. Commun Biol 3, 164 (2020). https://doi.org/10.1038/s42003-020-0886-4
Dr. Yanqing Su's group in the Department of Mechanical and Aerospace Engineering at the Utah State University (USU) is looking for fully funded Ph.D. students in the field of materials in extreme environments using small-scale computational methods. Self-motivated individuals who have research experience in one or more of the following areas are strongly encouraged to apply for the Ph.D. positions in our group:
Our paper on the phase-field mixture theory of tumor growth is published in JMPS. The continuum model simulates significant mechano-chemo-biological features of avascular tumor growth in the various microenvironment, i.e., nutrient concentration and mechanical stress.
Faghihi, Feng, Lima, Oden, and Yankeelov (2020). A Coupled Mass Transport and Deformation Theory of Multi-constituent Tumor Growth. Journal of the Mechanics and Physics of Solids, 103936.
We are looking for an enthusiastic candidate with a sound background in micromechanics/solid mechanics, and interest in data-driven multiscale modelling of heterogeneous materials to work on a project 'Heterogeneous Materials in Extreme Environments' within the Centre for Doctoral Training HetSys at the University of Warwick (see https://warwick.ac.uk/fac/sci/hetsys/).
Entry requirements
Dear Colleagues,
Hope this finds everyone well.
Please consider submitting an abstract to the Symposium 15 "Modeling and Design of Architected Materials" at the 10th International Conference on Multiscale Materials Modeling that will take place in Baltimore in October 19-23, 2020.
The deadline for abstract submission is March 31.
Journal Club for April 2020: Curvature-Affected Instabilities in Membranes and Surfaces
Fan Xu, Fudan University
Rajat Arora Amit Acharya
We present a framework which unifies classical phenomenological J2 and crystal plasticity theories with quantitative dislocation mechanics. The theory allows the computation of stress fields of arbitrary dislocation distributions and, coupled with minimally modified classical (J2 and crystal plasticity) models for the plastic strain rate of statistical dislocations, results in a versatile model of finite deformation mesoscale plasticity. We demonstrate some capabilities of the framework by solving two outstanding challenge problems in mesoscale plasticity: 1) recover the experimentally observed power-law scaling of stress-strain behavior in constrained simple shear of thin metallic films inferred from micropillar experiments which all strain gradient plasticity models overestimate and fail to predict; 2) predict the finite deformation stress and energy density fields of a sequence of dislocation distributions representing a progressively dense dislocation wall in a finite body, as might arise in the process of polygonization when viewed macroscopically, with one consequence being the demonstration of the inapplicability of current mathematical results based on $\Gamma$-convergence for this physically relevant situation. Our calculations in this case expose a possible 'phase transition'-like behavior for further theoretical study. We also provide a quantitative solution to the fundamental question of the volume change induced by dislocations in a finite deformation theory, as well as show the massive non-uniqueness in the solution for the (inverse) deformation map of a body inherent in a model of finite strain dislocation mechanics, when approached as a problem in classical finite elasticity.
Paper can be found at link Finite_Deformation_Dislocation_Mechanics.
