Shape-morphing structures based on perforated kirigami
Zhang, Y., Yang, J., Liu, M.*, & Vella, D. (2022). Shape-morphing structures based on perforated kirigami. Extreme Mechanics Letters, 56, 101857.
research
On the Direct and Reverse Multiplicative Decompositions of Deformation Gradient in Nonlinear Anisotropic Anelasticity
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
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
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
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.
Emergence of Exceptional Points in Periodic Metastructures with Hidden PT-symmetric Defects
Dear Colleagues, Our recent publication on the Journal of Applied Mechanics:
Computational Study of Mg3Bi2 as Anodes for Mg-ion batteries
Magnesum ion batteries are an exciting new technology that offer prospects towards significantly higher capacities of electrochemical storage. During discharge, each magnesium 2+ ion which moves through the electrolyte to the cathode results in 2 electrons driven through an electrical circuit, allowing for potentially higher performance in secondary ion batteries.
Special Issue "The Physics of Joining and Additive Manufacturing"
Special Issue "The Physics of Joining and Additive Manufacturing"
Link: https://www.mdpi.com/journal/applsci/special_issues/80839160HW
Dear Colleagues,
Mechanical couplings of 2D lattices uncovered by decoupled micropolar elasticity tensor and symmetry operation
We introduce a generalized methodology to uncover all mechanical couplings in 2D lattice geometries by obtaining the decoupled micropolar elasticity tensor. We also correlate the mechanical couplings with the point groups of 2D lattices by applying the symmetry operation to the decoupled micropolar elasticity tensor. The decoupled micropolar constitutive equation reveals eight mechanical coupling effects in planar solids, four of which are discovered for the first time in the mechanics' community.