Active Metamaterials In article number 2303541, Ruike Renee Zhao and co-workers present a novel magneto-mechanical metamaterial that employs double-layer design to change area density while preserving the overall for good conformability during actuation. Magnetic actuation facilitates rapid reversible structural deformation between multiple modes. This allows control propagation of in-plane ela...

In this article, the effect of size-dependent on the buckling and vibration analysis of functionally graded (FG) double-layer boron nitride plate based on classical plate theory (CPT) under electro-thermo-mechanical loadings which is surrounded by elastic foundation is examined. This subject is developed using modified couple stress theory. Using Hamilton's principle, the governing equations of...

The concentrically-layered photonic structure found in the tropical fruit Margaritaria nobilis serves as inspiration for photonic fibers with mechanically tunable band-gap. The fibers show the spectral filtering capabilities of a planar Bragg stack while the microscopic curvature decreases the strong directional chromaticity associated with flat multilayers. Elongation of the elastic fibers res...

Abstract To solve the problem of obtaining geoacoustic parameters multi-layer seabed in shallow water, a inversion method based on Bayesian theory is studied this paper. In study, assumed to be horizontal layered elastic medium, and error function established according sound pressure field water layer bayesian theory. The global optimization algorithm used obtain three target wave velocity, den...

this paper is concerned with the surface and small scale effects on transverse vibration of a viscoelastic single-layered graphene sheet (slgs) subjected to an in-plane magnetic field. the slgs is surrounded by an elastic medium which is simulated as visco-pasternak foundation. in order to investigate the small scale effects, the nonlocal elasticity theory is employed due to its simplicity and ...

The nonlinear elastic energy of a thin film of thickness h is given by a functional E. Friesecke, James and Müller derived the Γ-limits, as h → 0, of the functionals hE for α ≥ 3. In this article we study the invertibility properties of almost minimizers of these functionals, and more generally of sequences with equiintegrable energy density. We show that they are invertible almost everywhere a...

We introduce a simplified model for a multi-material made up of two elastic bodies connected by a strong thin material layer whose stiffness grows as 1 . The model is obtained by identifying the Γ-limit of the stored strain energy functional of the physical problem when the thickness of the intermediate layer tends to zero. The intermediate layer behaves as a stiffening elastic membrane. Furthe...

In this paper, a new formulation based on Artificial Neural Networks (ANN) is presented for backcalculation of pavement layer moduli. In structural analysis of flexible pavements, the procedures as Layered Elastic Theory, Equivalent Layer Thickness (ELT), and Finite Elements Method (FEM) generally have complex formulations and give approximate results. Therefore, it is extremely difficult to pe...