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Call for Papers ASME IMECE 2025 - Cold Spray, Thermal Spray, and Aerosol Deposition: Fundamentals and Applications (Topic 03-06)

Submitted by behrad_koohbor on

 

We are hosting a symposium on Cold Spray, Thermal Spray, and Aerosol Deposition: Fundamentals and Applications (Topic 03-06) with Dr. Ozan Ç. Özdemir, Dr. Tristan Bacha, and Dr. Abul Fazal Arif for the 2025 ASME International Mechanical Engineering Congress and Exposition (IMECE).

If you work in these areas, please consider submitting a 400-650 word abstract by March 4, 2025. Author notification of abstract acceptance is April 1, 2025.

Multiple funded (Direct) PhD positions at the University of Western Ontario, Canada

Submitted by HamidAbdolvand on

We have multiple (Direct) PhD positions in the field of micromechanics of metals and alloys. Our research focuses on the finite element modelling and diffraction-based characterization of deformation and fracture of polycrystalline materials. Currently our research themes include:

A convex variational principle for the necessary conditions of classical optimal control

Submitted by Amit Acharya on

Amit Acharya        Janusz Ginster

A scheme for generating a family of convex variational principles is developed, the Euler-Lagrange equations of each member of the family formally corresponding to the necessary conditions of optimal control of a given system of ordinary differential equations (ODE) in a well-defined sense. The scheme is applied to the Quadratic-Quadratic Regulator problem for which an explicit form of the functional is derived, and existence of minimizers of the variational principle is rigorously shown. It is shown that the Linear-Quadratic Regulator problem with time-dependent forcing can be solved within the formalism without requiring any nonlinear considerations, in contrast to the use of a Riccati system in the classical methodology.

Our work demonstrates a pathway for solving nonlinear control problems via convex optimization.

Field Dislocation Mechanics, Conservation of Burgers vector, and the augmented Peierls model of dislocation dynamics

Submitted by Amit Acharya on

Dissipative models for the quasi-static and dynamic response due to slip in an elastic body containing a single slip plane of vanishing thickness are developed. Discrete dislocations with continuously distributed cores can glide on this plane, and the models are developed as special cases of a fully three-dimensional theory of plasticity induced by dislocation motion. The reduced models are compared and contrasted with the augmented Peierls model of dislocation dynamics. A primary distinguishing feature of the reduced models is the a-priori accounting of space-time conservation of Burgers vector during dislocation evolution. A physical shortcoming of the developed models as well as the Peierls model with regard to a dependence on the choice of a distinguished, coherent reference configuration is discussed, and a testable model without such dependence is also proposed.

PhD position in solid/structural mechanics at Stony Brook University

Submitted by Paolo Celli on

At least one fully funded Ph.D. position is available in the Dynamic Structures Laboratory at Stony Brook University. The intended starting semester is Fall 2025.

The positions are in the general area of nonlinear mechanics and nonlinear dynamics of shape-morphing metamaterials and structures.