Blog posts

RA in Mechanics of Li Ion Batteries - Cambridge University

Submitted by Hilde F on Mon, 10/10/2022 - 17:49

Lithium ion batteries with solid state electrolytes are prone to degradation by a range of mechanisms including dendrite formation, void formation and swell-induced fatigue and micro-cracking. The topology of the battery plays a role over a number of length scales, from macro scale geometry of battery to the microstructural scale of the cathode. The kinetics of plating and stripping of lithium at free surfaces play a major role, along with the role of topology in terms of both performance and failure mechanisms.

On the Direct and Reverse Multiplicative Decompositions of Deformation Gradient in Nonlinear Anisotropic Anelasticity

Submitted by arash_yavari on Mon, 10/10/2022 - 17:49

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Anelasticity; Intermediate Configuration; Residual Stress; Finite Plasticity; Structural Tensors

In this paper we discuss nonlinear anisotropic anelasticity formulated based on the two multiplicative decompositions F=F^eF^a and F=F^aF^e.

Griffith-based analysis of crack initiation location in a Brazilian test

Submitted by Emilio Martíne… on Mon, 10/10/2022 - 14:22

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Brazilian test

Griffith

Dear iMechanicians, I hope that the paper below is of interest, given the wide use this experiment. Essentially, we use the generalised Griffith criterion to determine the crack initiation location in the Brazilian split test, establishing the conditions (jaws geometry and material properties) that lead to a valid test. We find that the range of conditions where the Brazilian test is valid is much narrower than previously thought, with current standards being inappropriate for a wide range of rock-like materials.

Call for abstracts! 2023 MRS Spring Meeting MD02-Data-Driven Multiscale Studies of Materials—Computations and Experiments

Submitted by Haoran Wang on Sat, 10/08/2022 - 17:49

Join us in San Francisco for the 2023 MRS Spring Meeting, the 50th Anniversary of MRS. We are inviting abstract submissions to Symposium MD02-Data-Driven Multiscale Studies of Materials—Computations and Experiments. Deadline October 27, 2022

Symposium MD02-Data-Driven Multiscale Studies of Materials—Computations and Experiments

Article: Modal added-mass matrix of an elongated flexible cylinder immersed in a narrow annular fluid, considering various boundary conditions. New theoretical results and numerical validation

Submitted by lagrangr on Sat, 10/08/2022 - 16:02

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fluid structure interaction sub-field discipline fluid mechanics

This paper considers the fluid–structure interaction problem of two coaxial cylinders separated by a thin layer of fluid. The flexible inner cylinder is imposed a small amplitude harmonic displacement corresponding to a dry vibration mode of an Euler–Bernoulli beam, while the external cylinder is rigid. A new theoretical formulation based on the assumption of a narrow fluid annulus is derived to estimate the modal added-mass matrix of the vibrating cylinder.

Production of Fibres from Lunar Soil: Feasibility, Applicability and Future Perspectives

Submitted by mapc on Fri, 10/07/2022 - 15:25

research

The construction of a lunar base is considered to be an important step towards deep-space exploration by humanity, and will rely on the utilisation of in situ lunar resources. In this paper, we discuss the current knowledge on the feasibility of converting lunar soil to high-performance fibres that can be used for the construction of a lunar base. This fibre would be combined with further portions of lunar soil to generate fibre-reinforced composites, which is utilized as multi-functional materials for lunar base construction.

Postdoc Positions and faculty positions at Jiangsu University, China

Submitted by zhujg on Fri, 10/07/2022 - 03:13

job

Postdoc positions are available at Jiangsu University, China. Those possessing PhDs in the area of mechanical engineering are sought. We are particularly interested in candidates with experience in experimental and computational mechanics, composite materials and structures etc. Applicants should submit a full curriculum vitae to zhujg [at] ujs.edu.cn (zhujg[at]ujs[dot]edu[dot]cn) .

Emergence of Exceptional Points in Periodic Metastructures with Hidden PT-symmetric Defects

Submitted by Ramathasan The… on Thu, 10/06/2022 - 15:35

Dear Colleagues, Our recent publication on the Journal of Applied Mechanics:

Postdoctoral Position in Dynamics of Metamaterials

Submitted by Harold S. Park on Thu, 10/06/2022 - 11:26

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metamaterials; dynamics; wave propagation

I am looking to recruit a highly motivated and independent postdoctoral researcher to study, theoretically and computationally topics related to the dynamics of metamaterials, with specific emphasis on wave phenomena. The position is available immediately, and potentially relevant backgrounds for the position include:

1. Phononic crystals

2. Acoustic or phononic bandgaps

3. Non-reciprocal wave propagation