Showing papers in "Mechanics of Materials in 2023"

TL;DR: In this paper , different fracture surfaces caused by fatigue failure were generated from 18Ni300 steel produced by selective laser melting (SLM), and hollow round bars with a transverse hole were tested under bending-torsion to investigate the crack initiation mechanisms and fatigue life.

TL;DR: In this paper , four distinct hybrid cellular materials were developed and fabricated in the current research utilizing advanced design software and Selective Laser Sintering (SLS) AM technique with Polyamide 12 (PA12) as a construction material.

TL;DR: In this paper , the early damage evolution mechanism and the constitutive model of CSTB under the consideration of initial defects are analyzed and discussed from macroscopic and microscopic viewpoints by using acoustic emission (AE), scanning electron microscopy (SEM), and nuclear magnetic resonance (NMR) techniques.

TL;DR: In this paper , the authors adopt the idea of Mori and Tanaka to approximate the phase strains by the homogeneous strains inside an Eshelbian inhomogeneity embedded into an infinite matrix, together with the phase strain fulfilling the strain average rule.

TL;DR: In this article , a convolutional neural network (CNN) was developed as a solution providing a high level of accuracy while being computationally efficient for modeling heterogeneous materials. But, the results with the CNN model show high accuracy in predicting the homogenized permeability and a significant decrease in computation time.

TL;DR: In this paper , a variational approach to cavitation is presented, and it is employed to derive a thermodynamically consistent model for the dynamics of bubble cavitation, where different energy contributions compete to optimize the system's total energy.

TL;DR: In this article , a combined experimental and modeling study into the origins of the improved elongation-to-fracture (ETF) in cyclic bending during tension facilitated by a continuous-bending-under-tension (CBT) test is performed.

TL;DR: In this article , the influence of curing on the thermo-viscoelastic properties and chemical shrinkage of a commercially available photopolymer resin used in SLA and DLP 3D printing is investigated.

TL;DR: In this paper , a thin sheet sample with an optimized geometry that induced shear stress states in two ligaments opposite to each other with respect to the loading axis was evaluated via synchrotron laminography.

TL;DR: In this paper , closed-form bound and exact solutions to the five independent effective elastic constants of nanofiber-reinforced composites with Steigmann-Ogden interface effect are obtained.

TL;DR: In this paper , a phase field theory of fracture incorporating rate dependence (i.e., kinetic viscosity) and anisotropic elasticity is implemented to study strength and failure modes in polycrystalline materials.

TL;DR: In this paper , a probabilistic mechanics framework for a composite double-lap joint with a functionally graded adhesive is proposed, where the elastic modulus of the adhesive is treated as a spatially varying stochastic field for homogeneous and graded adhesives.

TL;DR: In this paper , a method for calculating critical SIF (at a state just before crack growth initiation) directly by near-tip stress field has been implemented for amorphous isotropic solids.

TL;DR: In this article , influence functions for fully coupled quasi-static thermoelasticity are presented, which can be used to calculate displacements, stresses as well as temperature distributions within a halfspace for arbitrarily shaped and time dependent heat sources or pressure distributions on the surface.

TL;DR: In this article , all-atom molecular dynamics simulations are conducted to elucidate the thermomechanical characteristics of polylactic acid nanofibers with a diameter range of 1.93 nm-5.4 nm.

TL;DR: In this article , the authors derived an efficient analytical framework for the effective elastic moduli of lattice materials taking into account the influence of domain discontinuity in the cell walls of the unit-cells of a lattice metamaterial.

TL;DR: In this paper , the deformation of biconcave red blood cells (RBCs) in a fluid environment driven by ultrasonic standing waves is studied theoretically and numerically, where the cell membrane is modeled as a hyperelastic thin shell whose enclosed volume is assumed to be preserved to ensure osmotic equilibrium.

TL;DR: In this article , a continuum-based constitutive model is proposed to capture the large-strain material behavior of PVDF, the amorphous molecular network orientation/relaxation process, the strain-induced morphological anisotropy induced by the crystallographic texturing and the straininduced α → β phase transition.

TL;DR: In this article , the effect of initial texture on the formation of multiple necking patterns in ductile metallic rings subjected to rapid radial expansion was investigated, using finite element calculations, and guidelines to tailor the initial texture in order to delay dynamic necking formation and improve the energy absorption capacity of ductile metal materials at high strain rates.

TL;DR: In this article , the effect of geometrical parameters and loading level on the elastocaloric strength of NiTi SMA helical spring was investigated experimentally at first and then a threedimensional (3D) thermodynamic-consistent constitutive model within the finite strain framework was developed.

TL;DR: Wang et al. as discussed by the authors developed a new nonlinear viscoelastoplastic kinetics method to evaluate the high-temperature performance of modified asphalt binders and their aged materials.

TL;DR: The elastic properties of crystalline solids are known to be anisotropic in general as discussed by the authors , and it is known that the shear modulus G(n,m) is independent of m when n is normal to planes with three, four or sixfold symmetries.

TL;DR: In this paper , in-plane biaxial tensile tests employing two distinct cruciform specimens are performed to construct the forming limit curve (FLC) of AA6061-T4 sheets from shear to equi-biaxial stretching.

TL;DR: In this paper , a data-driven exploration of the design space of growth-based cellular metamaterials based on star-shaped distances is proposed, where a forward model is created to bypass the growth and homogenization process and accurately predict the mechanical properties given a finite set of design parameters.

TL;DR: In this paper , the effects of recycled aggregate and fibres on the fracture critical stress of original, natural aggregate concrete were studied using the incubation time criterion, which is invariant with respect to the history of loading in dynamic and static tests, and it is possible to construct the stress/strain rate dependences of the critical stress.

TL;DR: In this article , the stability of a circular electrodes-coated dielectric membrane under the combined action of an electric field and all-round in-plane tension was investigated and the bifurcation condition for axisymmetric necking was derived and used to show that this instability may occur before the Treloar-Kearsley instability or the limiting point instability for a class of free energy functions.

TL;DR: In this article , a coupled framework of dislocation density-based crystal plasticity model and slip-rate based hydrogen transport model is developed to simulate hydrogen-assisted damage at the deforming crack-tip.

TL;DR: In this paper , the results of in-situ cyclic tensile experiments performed on two dogbone specimens made of glass fiber mat reinforced polyester resin are presented (the second specimen contains a machined rectangular notch).

TL;DR: In this article , a finite viscoelastic (FV) model is used to model the dynamics of a crack propagating through a thin sheet of elastomers and the displacement fields in the body as the crack propagates through it can be accessed using the Digital Image Correlation (DIC) technique.

TL;DR: In this article , a novel surrogate modeling approach is presented to isolate the grains that are likely to exhibit extreme values of the fatigue indicator parameters (FIPs) and build robust, uncertainty quantified linkages between the local neighborhood statistics and the probability of fatigue crack formation.