Showing papers in "Acta Mechanica Solida Sinica in 2021"

TL;DR: Based on the symmetric re-entrant honeycomb (S-RH) structure with negative Poisson's ratios, a novel asymmetric and rotatable re-entry honeycomb structure was proposed in this article.

TL;DR: In this article, the elastic wave propagation properties of phononic crystals (PnCs) composed of an elastic matrix embedded in magnetorheological and electrorheological elastomers are studied.

TL;DR: In this paper, a locally resonant metamaterial is proposed for low-frequency band gaps, which is composed of two pairs of folded slender beams and a proof mass based on the theory of compliant mechanism.

TL;DR: The model established and the truncation analysis method proposed are helpful for studying the vibration of vehicle-pavement system and related systems.

TL;DR: In this article, the static and dynamic response of a piezoelectric semiconductor cantilever under the transverse end force with consideration of flexoelectrics and strain gradient elasticity is systematically investigated.

TL;DR: In this article, a geometrically nonlinear topology optimization method for continuum structures is proposed based on the independent continuous mapping method, where the stress constraint problem is studied due to the importance of structural strength in engineering applications.

TL;DR: In this article, the nonlocal strain gradient theory is adopted to investigate the static bending deformation of a functionally graded (FG) multilayered nanoplate made of one-dimensional hexagonal piezoelectric quasicrystal (PQC) materials subjected to mechanical and electrical surface loadings.

TL;DR: In this article, a temperature feedback control strategy is proposed to conduct the active control of thermal-mechanical buckling of composite laminated plates using piezoelectric facesheets as actuators.

TL;DR: In this paper, a fully noncontact experimental platform for ultrasonic Lamb wave damage detection was constructed, where laser exciting and the scanning laser Doppler vibrometer were used to realize the high-resolution pickup of the Lamb wave field in the structure, which has overcome the disadvantages of low spatial resolution caused by the conventional contact Lamb wave transducer.

TL;DR: In this article, the morphology and evolution of interfacial dislocation networks of Ni-based single-crystal superalloys are studied by molecular dynamics simulations, and three-dimensional cubic-type and sandwich-type models are chosen to explore the orientation-dependent morphology of dislocations networks, and their respective advantages and disadvantages are compared.

TL;DR: In this article, the authors reveal the evolution and distribution mechanism of circumferential strain of the current collectors on the fracture failure under the constraint of winding process, and propose a criterion for current collector strength based on the results of strain analysis and SEM observation.

TL;DR: In this article, a new model for producing band gaps for flexural elastic wave propagation in a periodic microbeam structure is developed using an extended transfer matrix method and a non-classical Bernoulli-Euler beam model that incorporates the strain gradient, couple stress and velocity gradient effects.

TL;DR: In this article, the nonlinear mechanism of MEMS vibratory ring gyroscopes is analyzed by applying a fully coupled nonlinear model, in which the gyroscopic coupling and geometrically and structurally nonlinear couplings are all taken into account.

TL;DR: In this paper, the nonlocal TED of circular single-layered graphene sheet (SLGS) nanoresonators in axisymmetric out-of-plane vibration utilizing the generalized dual-phase-lag thermoelasticity theory was investigated.

TL;DR: In this paper, the authors developed both numerical and theoretical models to analyze the energy absorption behaviors of Weaire, Floret, and Kagome-shaped thin-walled structures.

TL;DR: In this paper, the effect of the overband on the mechanical behavior of a no-insulation (NI) coil during a quench was analyzed, where a numerical model including a quencher model combined with a three-dimensional homogeneous mechanical model was employed to study the change of stress in the coil without and with the over band during a local quench.

TL;DR: In this paper, the effects of various porous structures used in the construction of the shell of a protective helmet on the energy absorption capacity and their efficacy in protecting the head/skull against impact force were investigated.

TL;DR: In this article, the frequency spectra, dispersion relations and frequency-temperature relations of SC-cut quartz crystal plates are calculated with plate configurations, and compared with those from AT-cut.

TL;DR: In this article, a new constitutive model for describing the superelastic-plastic behavior of porous shape memory alloys (SMAs) is proposed, which incorporates the influences of void shape and hydrostatic pressure as well as the elastic modulus mismatch between austenite and martensite.

TL;DR: In this article, a constitutive model is developed within the framework of fractional plasticity to delineate the coupling between inelastic deformation and damage of quasi-brittle materials.

TL;DR: In this paper, a multifunctional structural battery system comprising cylindrical battery cells and a surrounding lightweight lattice metamaterial was proposed to minimize stress on the battery during compression.

TL;DR: This feasibility study provides a new concept for the design and application of acoustic/elastic metamaterials in the bearing industry to improve machine service life and to enhance productivity and passenger comfort.

TL;DR: In this paper, the influence of surface effects on free transverse vibration and buckling of piezoelectric nanowires is investigated by surface energy density elasticity theory.

TL;DR: In this article, a non-classical model for transversely isotropic magneto-electro-elastic circular Kirchhoff plates is established based on the extended modified couple stress theory.

TL;DR: In this paper, the amplitude and phase spectroscopy curves and frequency responses acquired from three commonly used excitation schemes in bimodal amplitude modulation atomic force microscopy (AM-AFM) are compared and discussed.

TL;DR: In this paper, an analytical approach to explore the wave propagation problem of piezoelectric sandwich nanoplates is developed, and numerical studies are conducted to demonstrate the influences of propagation angle, small-scale and external loads on wave frequency.

TL;DR: In this article, a new composite structure specimen is designed and constructed by solidifying a standard epoxy resin tensile specimen using the three-dimensional printing technology, where a short rare-earth barium copper oxide (REBCO)-coated conductor (CC) tape is embedded.

TL;DR: In this article, the response of a composite beam (unimorph) with a piezomagnetic layer and a semiconductor layer under a transverse magnetic field is studied.

TL;DR: In this article, a finite strain elastoplastic flow model is established with an explicit formulation of work-hardening and softening effects up to eventual failure, in which both a new flow rule free of yielding and an asymptotically vanishing stress limit are incorporated.