Showing papers in "Mechanics of Materials in 2020"

TL;DR: In this article, the steady-state creep rate of salt rock under different stresses and the corresponding creep strain law were positively correlated with the increase in stress and time, and the long-term strength of the salt rock, determined via the isochronous stress-strain curve inflection point method, was 12MPa.

TL;DR: In this article, a modified couple stress-based shell model within the framework of the higher-order shear deformation shell theory and von Karman geometrical nonlinearity is constructed.

TL;DR: In this paper, the authors put the stiffness and strength of ultrafine-grained metals under scrutiny by means of experimental and analytical mechanics, and they showed that an ultrafinegrained pure metal (e.g., Al) possesses a heterogeneous microstructure with the grain boundary stiffness lower than the grain/subgrain stiffness.

TL;DR: In this article, the applicability of nonlocal mechanics to multiscale materials and single-scale materials is discussed, and the existing complications of solving nonlocal field problems, and various methods and approaches to overcome these complications are collected and discussed from the physical and material points of view.

TL;DR: In this article, a parametric study was carried out to investigate the dependence of the Poisson's ratio to the triangle edge lengths, and it was observed that the lateral displacements, as well as energy absorption of the triangular stents were twice and three times as high as the conventional anti-trichiral stents respectively.

TL;DR: In this article, a side hierarchical triangular honeycomb (SHTH) constructed by sequentially arranging a certain number of similar subtriangles on the geometrical side of an OTH is proposed to enhance structural mechanical performance, and a parametric investigation of the SHTH is performed to explore the influences of the relative density, hierarchical factor and layout of the honeycomb on crashworthiness.

TL;DR: In this paper, an effective computational optimization approach for size-dependent isogeometric analysis of functionally graded (FG) sandwich nanoplates is proposed, which smoothly and continuously ensures the distributions of ceramic volume fraction across each layer, and automatically satisfies the C0-continuity at each layer interface.

TL;DR: In this paper, Wang et al. analyzed the dynamic mechanical properties of frozen soil at different temperatures and high strain rates using a split Hopkinson pressure bar (SHPB), and the variation of the wave impedance of the frozen soil was analyzed.

TL;DR: In this article, graded chiral auxetic cellular metal structures were produced from copper alloy powder using Selective Electron Beam Melting (SEBM) technique and tested under compressive and shear loading conditions.

TL;DR: In this article, a new model was developed for transversely isotropic magneto-electro-elastic Timoshenko beams by using a variational formulation based on Hamilton's principle.

TL;DR: In this paper, the effects of material properties, nonlocal parameter, Lorentz and electric forces on maximum static deflections and natural frequencies of actuated hybrid carbon/boron-nitride nanotubes (CBNNT) subjected to thermal loads are studied for the first time.

TL;DR: In this paper, a plethora of experiments under the uniaxial mode of tensile deformation were conducted to predict the mechanical responses of Ecoflex over a wide range of Shore hardnesses, including loading-unloading cyclic tests, stretchability tests, single-step relaxation tests, Mullins effect tests, stress recovery tests, and temperature dependence tests at different strain levels.

TL;DR: In this paper, the effects of graphene on the mechanical properties of multilayer Cu/graphene composites under uniaxial tension were investigated and it was found that both of zigzag and armchair graphene can improve the mechanical strength of multi-layer composites.

TL;DR: In this article, the rotation bending fatigue (RBF) tests of selective laser melting (SLM) AlSi10Mg bar samples that included three building directions are carried out, and the results indicate that most fatigue cracks initiated from the unmelted defects of the sample surfaces (or subsurface).

TL;DR: In this paper, a finite element (FE) model was developed using ABAQUS/Explicit and validated against the dynamic test results in terms of deformation mode, plateau stress, and Poisson's ratio.

TL;DR: In this article, a phase-field model for rate-dependent fracture of rubbers in a finite strain setting (Loew et al., 2019) was extended to describe damage under cyclic loading.

TL;DR: In this article, a broadband flexural wave black hole equipment or concentrator which is designed by the coordinate transformation method and active control systems has been proposed, where polydimethylsiloxane (PDMS) and piezoelectric transducer (PZT) patches connected by external electrical circuits are used as the active components of the flexur wave concentrating configuration.

TL;DR: In this paper, the influence of untreated coal waste (UCW) as a partial replacement of natural coarse aggregates (NCA and NFA) on the properties of concrete was measured.

TL;DR: In this article, a dynamic testing system for concrete-like material under static triaxial confinements is developed, where a cubic sample with length 50mm is constrained by six steel square bars.

TL;DR: In this paper, the fracture processes in concrete subjected to monotonic and fatigue loadings are characterized and the differences in failure mechanisms are studied using acoustic emission (AE) and digital image correlation (DIC) techniques.

TL;DR: In this article, asymptotic homogenization is used to predict the mechanical properties of fused filament fabricated thermoplastics with line infill, grid infill and gyroid structures.

TL;DR: In this paper, a microstructure-based multiscale finite element (FE) method was developed to investigate the effect of temperature fields on the damage initiation within the asphalt pavement under traffic loading.

TL;DR: In this paper, the authors developed an accurate simulation method for FDM-printed monolayer SMP models based on the secondary development of ABAQUS software, which could accurately and simply simulate the deformation processes of various pre-programmed structures.

TL;DR: In this paper, the bending characteristics of all-composite honeycomb sandwich beams were investigated by a three-dimensional failure mechanism map and verified by three-point bending tests.

TL;DR: In this article, a cuttlebone-like lattice (CLL) material is obtained and its deformation behavior and compressive properties under impact loads are investigated, and the results show that the CLL material undergoes a bucklingdominated and layer-by-layer deforming process, irrespective of cell-wall materials and relative densities.

TL;DR: In this article, the dynamic stability of an Euler-Bernoulli nanobeam under time-dependent axial loading based on the nonlocal strain gradient theory (NSGT) and considering the surface stress effects was analyzed.

TL;DR: In this article, a stochastic multi-scale method was proposed to quantify the most significant input parameters influencing the heat conductivity of polymeric nano-composites (PNCs) with clay reinforcement.

TL;DR: In this article, the determination of the strain gradient elasticity coefficients of composite material in the framework of the homogenization methods is dealt with and a new relationship is provided to correct the approach based on the quadratic boundary condition.

TL;DR: In this paper, the authors present new mechanistic insights into the effects of in-situ stresses on blast responses of intact rocks via integrated analytical and numerical analyses, which can improve the mechanistic understanding of the evolution of dynamic rock behavior in different in situ stress conditions.

TL;DR: In this article, the effects of pore morphology as well as porosity on the deformation and failure mechanisms of triply periodic minimal surface (TPMS) structures under compression are investigated.