Polymeric plastics deform irreversibly (i.e., inelastically) whereas rubbers deform reversibly, i.e., elastically.
Thus, uniaxially stretching a rubber-plastic bilayer composite beyond its yield point can create an elastic strain mismatch between the two layers. Upon release, the bilayer may then bend out-of-plane.
We report phenomenal yield strengths—up to one-fourth of the theoretical strength of silver—recorded in microcompression testing of initially dislocation-free silver micro- and nanocubes synthesized from a multistep seed-growth process. These high strengths and the massive strain bursts that occur upon yield are results of the initially dislocation-free single-crystal structure of the pristine samples that yield through spontaneous nucleation of dislocations.
Dear colleagues,
There is a new opening for one postdoc/PhD student position, to be filled immediately, in my research group in the Department of Civil Engineering and Engineering Mechanics at Columbia University. We are looking for postdocs/PhD in the broad area of computational mechanics. Candidates should have expertise and experience on modeling dynamic responses of path-dependent materials and software development. Our project is specifically focused on applications of machine learning for computational plasticity and damage.
PhD position(s) is available for Spring 2022 in the Engineering Mechanics program in Aerospace Engineering Department at Iowa State University to perform theoretical and computational part of work on NSF-funded projects on the interaction between phase transformations and plasticity. Phase-field, micromechanical, and macroscale simulations using FEM are of interest, in close collaboration with high-pressure experiments performed in our lab. Please send vita to Prof.
A one-year post-doc position is available in our research group at the University of Houston with a start date of 1 September 2021.
We are interested in understanding how microstructural aspects govern material failure. Our approach relies on formulating theoretical frameworks that are informed by experiments and implementing them computationally.
Join us to expand in more novel directions:
(i) Data-driven plasticity and failure;
(ii) Phase-field approaches to plasticity and failure;
The project “Computational mechanics and optimisation for energy absorption of materials” is calling for applications for PhD scholarship commencing in 2021. This project is funded by the Australian Research Council Discovery Early Career Researcher Award. Candidates with knowledge and research experience in computational mechanics, design optimisation and machine learning are encouraged to apply.
Project description:
I am looking to recruit a highly motivated and independent postdoctoral researcher to study, via the development of new computational methodologies, the deformation mechanisms in crystalline nanostructures. The specific emphasis is on predicting the plasticity at timescales that far exceed those possible in classical atomistic simulations, and verifying the predictions through collaborations with experimentalists. The position is available as soon as possible for at least a 1.5-year duration, with possible extension to future years depending on the availability of funding.
#IPPTPAN in collaboration with Department of Engineering at #NTU is offering four fully supported #PhD positions in the following fields:
1) Non-linear thermo-mechanical behaviour of polycrystalline shape memory alloys undergoing complex loadings < https://www.ippt.pan.pl/_download/tem_prac_dok/2020_z_kowalewski_en_1.p… >
Dear colleagues,
There is a new opening for one postdoc position, to be filled immediately, in my research group in the Department of Civil Engineering and Engineering Mechanics at Columbia University. We are looking for postdocs in the broad area of computational mechanics. Candidates should have expertise in modeling dynamic responses of path-dependent materials. Our project is specifically focused on applications of machine learning (reinforcement learning, graph embedding) for computational plasticity and damage.
