Title: Modeling and Simulation Engineer
Category: Full-time position in industry
Employer: Schlumberger Technology Corporation
Location: United States, Texas, Sugar Land
Opening Date: 01/01/2023
Intro
Ryan C. Hurley of the Johns Hopkins University will be the next Editor of the iMechanica Journal Club. The Journal Club was initiated in January 2007, soon after the launch of iMechanica. It has quickly grown into a flagship feature of iMechanica, epitomizing the vibrant topics and dynamic researchers at the frontier of mechanics.
We are looking for self-motivated and enthusiastic students with a degree in mechanical or materials engineering. Students with following backgrounds are strongly recommended to apply:
The fracture of concrete and other semi-brittle materials offers some simplifications that simplify the analytical analysis. The simple check that reveals if something broken requires an elastic or an elastic-plastic fracture mechanical analysis by just trying to fit the pieces together sometimes fails. The suggestion is that if they do not fit together, we have an elastic-plastic fracture and if they do we have an elastic fracture. We may jump to the false conclusion that linear elastic fracture mechanics can be applied.
The Gu Research Group at UC Berkeley has postdoc positions available in the areas of computational fluid dynamics, aerodynamics, and aeroelasticity. Interested candidates should contact Prof. Grace Gu at ggu [at] berkeley.edu and attach your CV.
Postdoc positions are available in Dr Min Luo’s group (https://person.zju.edu.cn/en/minluo) at the Ocean College of Zhejiang University, China (ranked #45 in QS Global World Rankings 2022). Those holding a PhD degree in the areas of Computational Fluid Mechanics and Civil/Hydraulic/Ocean Engineering are welcome to apply.
1. Project description
The transition between necking-mediated tensile failure of glasses, at elevated temperatures
and/or low strain-rates, and shear-banding-mediated tensile failure, at low temperatures and/or
high strain-rates, is investigated using tensile experiments on metallic glasses and atomistic simula-
tions. We experimentally and simulationally show that this transition occurs through a sequence of
macroscopic failure patterns, parametrized by the ultimate tensile strength. Quantitatively analyz-
Understanding the fracture toughness of glasses is of prime importance for
science and technology. We study it here using extensive atomistic simulations in
which the interaction potential, glass transition cooling rate, and loading geometry
are systematically varied, mimicking a broad range of experimentally accessible
properties. Glasses’ non-equilibrium mechanical disorder is quantified through
Ag, the dimensionless prefactor of the universal spectrum of non-phononic
In this project, the research fellow is expected to work on the K&C concrete model in LS-DYNA. Focusing on normal strength concretes of ~45 to 60 MPa compressive strengths, the research fellow has to calibrate the material parameters against experimental data, and to establish all modelling inputs for simulating the response of concrete structures against very high impact loading conditions. The numerical predictions will be benchmarked against experimental data.
