UM-SJTU Joint Institute at Shanghai Jiao Tong University hosts a Young Investigators Symposium in Innovative Technology (FIT) 2022. Through this symposium, we also search for outstanding faculty candidates.
https://www.linkedin.com/pulse/young-investigators-symposium-frontiers-
S-Lab (https://sites.ji.sjtu.edu.cn/jaehyungju/) is looking for a highly qualified postdoc to work in mechanical metamaterials, 4D printing, and soft robotics. The ideal candidate will conduct independent and supervised research, perform tasks on experimental, theoretical, and modeling/simulation projects, write reports, submit deliverables to sponsors, publish papers, lead collaborative projects, and supervise graduate and undergraduate students and proposal preparation.
We introduce a generalized methodology to uncover all mechanical couplings in 2D lattice geometries by obtaining the decoupled micropolar elasticity tensor. We also correlate the mechanical couplings with the point groups of 2D lattices by applying the symmetry operation to the decoupled micropolar elasticity tensor. The decoupled micropolar constitutive equation reveals eight mechanical coupling effects in planar solids, four of which are discovered for the first time in the mechanics' community.
Topic 12-12: Mechanical Metamaterials
Organized by
Jordan Raney, University of Pennsylvania, USA, raney [at] seas.upenn.edu (raney[at]seas[dot]upenn[dot]edu)
Jaehyung Ju, Shanghai Jiao Tong University, China, jaehyung.ju [at] sjtu.edu.cn (jaehyung[dot]ju[at]sjtu[dot]edu[dot]cn)
Most 4D printings utilize 1D structural deformation — bending and coiling to morph a flat shape by controlling only a single curvature, limiting the realization of complex 3D curved surfaces with two curvatures. We quantitatively analyze the morphing of a 2D plate into doubly curved surfaces on a direct 4D printing of a single isotropic material employing anisotropy of shape memory effect during the extrusion-based printing.
Anisotropy and chirality create an interesting mechanical coupling – axial-shear coupling. This paper also reports a weak correlation of chirality with negative Poisson’s ratio and a directional negative and positive Poisson’s ratio of a tetra-achiral lattice.
For more information, you can check this paper:
https://www.sciencedirect.com/science/article/pii/S0264127521000368
We discovered a novel mechanical coupling effect – axial-bending coupling. Unlike Poisson, axial-shear, and axial-twisting coupling effects, this axial-bending coupling occurs at a non-centrosymmetric square lattice.
For more information, you can check this paper:
https://www.sciencedirect.com/science/article/pii/S0264127522001538
