Journal of the mechanical behavior of materials 

About: Journal of the mechanical behavior of materials is an academic journal published by De Gruyter. The journal publishes majorly in the area(s): Engineering & Ultimate tensile strength. It has an ISSN identifier of 0334-8938. It is also open access. Over the lifetime, 805 publications have been published receiving 4058 citations. The journal is also known as: Journal of the mechanical behavior of materials & Journal of the mechanical behaviour of materials (Internet).

On Some Aspects in the Special Theory of Gradient Elasticity

Abstract: In this paper a special form of gradient-dependent elasticity is considered. The motivation for considering higher-order gradients of strains in elasticity is discussed. Equilibrium equations and boundary conditions are discussed. The relationship between the special form of gradient elasticity adopted in this study and mixture or nonlocal theories is considered. Solutions to certain problems including the propagation of harmonic waves, the longitudinal vibrations of a beam, and the displacement field in an infinite medium weakened by a line crack are given.

Controllability of the incremental response of soil specimens subjected to arbitrary loading programmes

Abstract: The paper shows that the possibility of controlling the incremental response of a soil specimen subjected to an arbitrary loading programme is lost at a stress level which is below the value for which failure occurs in ordinary tests. The relation between this level and other critical values (bifurcation into a shear band, peak of the stress deviator in an undrained test, stability under dead load) is discussed.

Gradient Effects at Macro, Micro, and Nano Scales

Abstract: The effects of gradients on the localization and patterning of deformation at various scales ranging from the millimeter (macroscale) down to the nanometer (nanoscale) are discussed. At the nanoscale, a dominant mechanism of deformation is the rearrangement of free nano volume and exchange of momentum between bulk and grain boundary space. At the microscale, a most common mechanism of deformation is dislocation motion. At the macroscale, deformation patterning occurs by the transport of strain from one region of the deforming material to another. In each case, higher order gradients of the respective nano, micro or macro variables are essential to be included in the constitutive equations. This leads to various classes of material behavior including a gradient theory of elasticity, a gradient theory of defect dynamics, and a gradient theory of macroscopic plasticity. Within such \"internal-length\" theories it is possible to discuss the occurrence of deformation patterns at various scales, the determination of width, spacing and velocity of deformation bands, as well as the structure of the crack tip and the removal of associated strain or stress singularities.

More hyperelastic models for rubber-like materials: consistent tangent operators and comparative study

Abstract: Abstract Rubber-like materials can deform largely and nonlinearly upon loading, and they return to the initial configuration when the load is removed. Such rubber elasticity is achieved due to very flexible long-chain molecules and a three-dimensional network structure that is formed via cross-linking or entanglements between molecules. Over the years, to model the mechanical behavior of such randomly oriented microstructures, several phenomenological and micromechanically motivated network models for nearly incompressible hyperelastic polymeric materials have been proposed in the literature. To implement these models for polymeric material (undoubtedly with widespread engineering applications) in the finite element framework for solving a boundary value problem, one would require two important ingredients, i.e., the stress tensor and the consistent fourth-order tangent operator, where the latter is the result of linearization of the former. In our previous work, 14 such material models are reviewed by deriving the accurate stress tensors and tangent operators from a group of phenomenological and micromechanical models at large deformations. The current contribution will supplement some further important models that were not included in the previous work. For comparison of all selected models in reproducing the well-known Treloar data, the analytical expressions for the three homogeneous defomation modes, i.e., uniaxial tension, equibiaxial tension, and pure shear, have been derived and the performances of the models are analyzed.

A review on mechanical and water absorption properties of polyvinyl alcohol based composites/films

Abstract: Abstract Polyvinyl alcohol (PVA) is a nontoxic and thermoplastic polymer which is completely biodegradable. PVA shows excellent mechanical and thermal properties due to better interfacial adhesion with reinforcing material such as fibers, particles or flakes because of which it can be used for fabrication of composite. PVA based fiber or particle reinforcing composites have gained interest in many applications in different fields. This paper reviews the mechanical and water absorption properties studied by different researcher and some of them were discussed here. The article also focused on the effect on the mechanical properties on PVA based composites with particle or fiber used as reinforcing material at nano/micro level and different polymers used to prepare PVA blend films. The major disadvantage of PVA based composites/films is higher water uptake or solubility in water. To over this negative aspect, many researchers studied crosslinking of PVA based composites/films, which are also discussed in the article. This review concludes that PVA has the potential for use in the synthesis of composites/films with their abundant applications.