Blog posts

Authors: Abhishek Arora, Caglar Oskay

We are seeking a highly motivated postdoctoral fellow with an interest in the high-pressure and high-strain-rate behavior of geomaterials (e.g., sandstones) and concrete. The successful candidate will be appointed as a Postdoctoral Fellows in the Hopkins Extreme Materials Institute (HEMI) at Johns Hopkins University. A portion of the successful candidate’s work will be associated with the Materials Science in Extreme Environments University Research Alliance (MSEE URA).

The Mechanical and Aerospace Engineering Department of the Cullen College of Engineering at the University of Houston invites applications for the Panos Family Endowed Chair position at the rank of Full Professor. The Panos Family Chair Professorship has been established from a $4.5 million gift from the Thomas Michael Panos Family Estate and a $2 million matching from the University’s $100 million Challenge Aspire Fund.

It is known that the balance laws of hyperelasticity (Green elasticity), i.e., conservation of mass and balance of linear and angular momenta, can be derived using the first law of thermodynamics and by postulating its invariance under superposed rigid body motions of the Euclidean ambient space---the Green-Naghdi-Rivlin theorem. In the case of a non-Euclidean ambient space, covariance of the energy balance---its invariance under arbitrary time-dependent diffeomorphisms of the ambient space---gives all the balance laws and the Doyle-Ericksen formula---the Marsden-Hughes theorem.