Somnath Ghosh
Professor
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Positions (1)
Johns Hopkins University
Johns Hopkins University
Johns Hopkins University is advertising PhD and postdoctoral researcher openings in the Computational Mechanics Research Laboratory (CMRL) and CISMMS within the Department of Civil and Systems Engineering. The positions are in the research group of Professor Somnath Ghosh and are tied to sponsored research objectives. The research themes span computational mechanics , computational materials science , integrated computational materials engineering (ICME) , machine learning , uncertainty quantification , multiscale modeling of fatigue and failure in metals and composites, phase-field modeling of failure, and crystal plasticity FEM of polycrystalline materials. This is a strong fit for students and researchers interested in mechanics, materials modeling, data-driven methods, and multiscale simulation. Applicants from Mechanical Engineering , Civil Engineering , Materials Science , Aerospace Engineering , and Physics are specifically encouraged to apply, provided they have a strong background and interest in the listed areas. To apply, interested candidates should email their resume/CV to [email protected] . The post also points to the lab website for additional information. No deadline, stipend, or detailed funding package is stated, but the positions are described as being based on sponsored research.
Articles (12)
Year:
2024
Year:
2024
This paper introduces a coupled electromechanical finite deformation phase field model for crack propagation and interfacial decohesion in multiphase piezoelectric composites with interfaces. The crack phase field model is augmented with cohesive traction-separation laws at the material interfaces, derived from a cohesive potential function. A Gibbs free energy density function is proposed, allowing for the incorporation of the anisotropic elastic stiffness of the piezoelectric material. Numerical simulations exhibiting different failure mechanisms are carried out to demonstrate the efficacy of the model. Effects of external electric field on crack evolution and the competition between penetration and deflection of a crack impinging on an interface are investigated. Limited verification tests are conducted with theoretical results. Finally, the model is used to simulate fracture in nonuniform piezocomposite microstructures. The effect of crack propagation on the evolution of the electric field with different crack face conditions are analyzed. Differences in the electromechanical responses of piezocomposites due to different fiber distributions are also observed.
Year:
2023
Year:
2023
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2023
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2023
Year:
2022
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2022
Year:
2022
Year:
2022
Year:
2022
Year:
2022
Collaborators (1)
Brendan Croom
Johns Hopkins University Applied Physics Laboratory
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