Lotus leaves floating on water usually experience short-wavelength edge wrinkling that decays toward the center, while the leaves growing above water normally morph into a global bending cone shape with long rippled waves near the edge. Observations suggest that the underlying water (liquid substrate) significantly affects the morphogenesis of leaves.
Curvature-induced symmetry-breaking pattern formation and transition are widely observed in curved film/substrate systems across different length scales such as embryogenesis, heterogeneous micro-particles, dehydrated fruits, growing tumors and planetary surfaces.
H. Hou, E. Simsek, T. Ma, N.S. Johnson, S. Qian, C. Cissé, D. Stasak, N. Al Hasan, L. Zhou, Y. Hwang, R. Radermacher, V.I. Levitas, M.J. Kramer, M. Asle Zaeem, A.P. Stebner, R.T. Ott, J. Cui, I. Takeuchi. Fatigue-resistant high-performance elastocaloric materials made by additive manufacturing. Science 366 (6469) (2019) 1116-1121.
Abstract
Adhesive contact of the Hertzian indenter with an incompressible elastic substrate bi-directionally stretched along the indenter principal planes of curvature is considered in the Johnson–Kendall–Roberts theoretical framework. An approximate model is constructed by examining energy release rate conditions only on the edges of the minor and major axes of the contact ellipse. The effect of weak coupling between fracture modes I and II is introduced using a phenomenological mode-mixity function.
N. Zhang and M. Asle Zaeem. Nanoscale flaw tolerance behaviour of polycrystalline tetragonal zirconia nanopillars. International Journal of Mechanical Sciences 173 (2020) 105405 (7 pages).
The Department of Civil and Environmental Engineering at the National University of Singapore invites applications for Research Fellow (RF) position in Civil Engineering.
The National University of Singapore (NUS) is a leading global university; ranked 1st in Asia and 11th globally in the 2019 Quacquarelli Symonds (QS) World University Rankings. According to the QS World University Rankings by Subject 2019, the NUS Civil & Structural Engineering discipline has been placed 2nd in the world and 1st in Asia.
A research group at Iowa State University is looking for fully funded research assistants in the general field of theoretical, applied, and computational mechanics of materials. Research topics will fall into a broad area of modeling and simulation of mechanical and transport behaviors, such as plasticity, fracture, phase transformation, thermal transport, and mass transport, in a variety of engineering materials.
Dear Colleagues:
We would like to cordially invite you to attend the symposium entitled "Mechanics and Physics of Active Materials and Systems" organized under track "Frontiers in Mechanics of Materials" in the Society of Engineering Science (SES) 57th Annual Technical Meeting conference. The conference will be held in Minneapolis, Minnesota, September 28–30, 2020 (https://ccaps.umn.edu/SES).
https://cbn.iit.it/openings/1151:1-post-doc-position-for-computational-soft-contact-mechanics
feel free to contact me michele.scaraggi [at] iit.it
