The contact between a rigid Hertzian indenter and an adhesive broad-band viscoelastic substrate is considered. The material behavior is described by a modified power law model, which is characterized by only four parameters, the glassy and rubbery elastic moduli, a characteristic exponent n and a timescale tau0.
The Kang Group for Bioinspired Extreme Materials is looking for outstanding candidates to join the group. We have openings as below. Due to the large volume of applications received, we will contact only those selected for interviews. Thank you for your understanding.
Postdoctoral Fellow
One postdoctoral fellow position is available in the area of bioinspired materials with focus on experimental aspects.
The Department of Mechanical and Production Engineering (MPE) at Aarhus University is expanding its research and teaching activities in the field of “Renewable Energy Technologies” and invites applications for two Tenure-track Assistant / Associate Professor positions within the Section of “Fluids and Energy”.
The Department of Mechanical and Production Engineering (MPE) at Aarhus University is expanding its research and teaching activities in the field of “CO2 capture or conversion” and invites applications for Tenure-track Assistant / Associate Professor position within the Section of “Fluids and Energy”.
The Computational Mechanics and Methods (CM3) Group in the Department of Mechanical and Aerospace Engineering at the University of Kentucky is seeking highly self-motivated individuals who have great interest in the broad research areas of computational solid mechanics and methods, beginning either Spring 2025 or Fall 2025. Interested individuals should send a detailed CV and official transcripts to Dr.
In differential geometry, rigidity theory investigates whether a surface can deform by pure bending without stretching. The central problem is to find or disprove the existence of isometric deformations.
Classical examples in the "discrete" category include:
In the "smooth" category, we have:
We are looking for a Postdoc Fellow in the area of structural mechanics (4D printed morphing structures). The successful candidate will work in Hopkins Extreme Materials Institute (HEMI), Johns Hopkins University on a fully funded research project.
Duties
• Design, fabricate and conduct mechanical tests and numerical simulations on morphing structures with programmable materials such as shape memory polymer or other similar materials
• Write technical reports, papers and research proposals
• Guide the graduate students in the group
It is 50 years that people use models of viscoelastic fracture which assume the fracture energy in the process zone is independent on the crack speed. This has been assumed in the cohesive models by Knauss and Schapery and then by the dissipation theory of de gennes and Persson-Brener. Researchers like to use this model because it is simple. Unfortunately, it does not work, as we show in adhesion experiments in the recent JMPS paper attached. We obtain nice results for a broad band power law material, but these results only work at very low speeds.
by Oscar Lopez-Pamies, John E. Dolbow, Gilles A. Francfort, and Chris J. Larsen
Abstract
