Title of the project: Ab initio modelling of interactions between dislocations and solutes in body-centered cubic metals
Research area: Solid State Physics, Materials Science
Summary of the project:
Effect of out-of-phase loading on fretting fatigue response of Al7075-T6 under cyclic normal loading using a new testing apparatu
I hope some of you find this work interesting, the code with the control algorithm (Segurado and Llorca, 2004) to avoid convergence problems in cohesive zone model analyses of crack propagation can be downloaded from empaneda.com/codes (documentation and Abaqus input files are provided).
Non-local plasticity effects on notch fracture mechanics
Emilio Martínez-Pañeda, Susana del Busto, Covadonga Betegón
Theoretical and Applied Fracture Mechanics (2017)
An interesting commercial/scientific paper
Auxetic materials with negative Poisson's ratios have important applications across a broad range of engineering areas, such as biomedical devices, aerospace engineering and automotive engineering. A variety of design strategies have been developed to achieve artificial auxetic materials with controllable responses in the Poisson's ratio. The development of designs that can offer isotropic negative Poisson's ratios over large strains can open up new opportunities in emerging biomedical applications, which, however, remains a challenge.
A continuum-based model is presented for the mechanics of bidirectional composites subjected to finite plane deformations. This is framed in the development of a constitutive relation within which the constraint of material incompressibility is augmented. The elastic resistance of the fibers is accounted for directly via the computation of variational derivatives along the lengths of bidirectional fibers. The equilibrium equation and necessary boundary conditions are derived by virtue of the principles of virtual work statement.
Level: Ph.D, start from Fall 2018
When: Apply Now by sending CV to yaning.li [at] unh.edu (yaning[dot]li[at]unh[dot]edu
Level: Ph.D, start from Fall 2018
When: Apply Now by sending CV to yaning.li [at] unh.edu
Fellowship: Deadline 02/25/2018. (again directly sending CV to yaning.li [at] unh.edu) https://ceps.unh.edu/graduate-fellowships
Eric Acome, Nicholas Kellaris, Timothy Morrissey, Shane K. Mitchell, Christoph Keplinger
University of Colorado Boulder
Introduction
We introduce a new family of mixed finite elements for incompressible nonlinear elasticity — compatible-strain mixed finite element methods (CSFEMs). Based on a Hu-Washizu-type functional, we write a four-field mixed formulation with the displacement, the displacement gradient, the first Piola-Kirchhoff stress, and a pressure-like field as the four independent unknowns. Using the Hilbert complexes of nonlinear elasticity, which describe the kinematics and the kinetics of motion, we identify the solution spaces of the independent unknown fields.
