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An adaptive wavelet method for nonlinear partial differential equations with applications to dynamic damage modeling

Submitted by karelmatous on
research
wavelets
partial differential equations
damage
High Performance Computing
multiscale

Paper on arXiv: An adaptive wavelet method for nonlinear partial differential equations with applications to dynamic damage modeling 

Deployable mechanical metamaterials with multistep programmable transformation

Submitted by Mingchao Liu on
research
mechanical metamaterials
programmable transformation
kirigami
self-folding

Meng, Z., Liu, M., Yan, H., Genin, G. M., & Chen, C. Q.* (2022). Deployable mechanical metamaterials with multistep programmable transformation. Science Advances, 8(23), eabn5460.

Modular multistable metamaterials with reprogrammable mechanical properties

Submitted by Mingchao Liu on
research
Modular metamaterials
snap-through
Multistability
Reprogrammability

Mao, J. J.*, Wang, S., Tan, W.*, & Liu, M.* (2022). Modular multistable metamaterials with reprogrammable mechanical properties. Engineering Structures, 272, 114976.

 

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

Submitted by arash_yavari on
research
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=FeFa and F=FaFe.

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

Submitted by Emilio Martíne… on
research
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.

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
research
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
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.

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