Showing papers in "Mechanics of Materials in 2007"

TL;DR: A continuum damage model for the prediction of the onset and evolution of intralaminar failure mechanisms and the collapse of structures manufactured in fiber-reinforced plastic laminates is proposed in this article.

TL;DR: In this article, the authors describe the computational implementation of a new damage model for laminated composites proposed in a previous paper, which is assured by regularizing the energy dissipated at a material point by each failure mechanism.

TL;DR: In this paper, a unified theoretical framework is presented to predict the effective moduli of multiphase composites containing spherical particles or cylindrical fibres with various interface effects.

TL;DR: In this paper, a constitutive model is developed to capture the rate-dependent stress-strain behavior of an amorphous polymer (poly(ethylene terephthalate)-glycol (PETG)) at temperatures in and above the glass transition (θg).

TL;DR: In this paper, a phenomenological model has been proposed with a view to explaining the expanded polystyrene (EPS) concrete particle size effect and predicting its normalized compressive strength according to the concrete (macro) porosity (p) and to the ratio ϕ l c, where (lc) is the width of the EPS concrete matrix fracture process zone (FPZ).

TL;DR: Raghavan et al. as mentioned in this paper developed an adaptive concurrent multi-level computational model for multi-scale analysis of composite structures undergoing damage initiation and growth due to microstructural damage induced by debonding at the fiber-matrix interface.

TL;DR: In this article, an elastoplastic model for predicting the hydraulic and stress-strain behavior of unsaturated soils is presented, which takes into account the effect of the degree of saturation on stress−strain behaviour, the void ratio on water-retention, and the influence of suction.

TL;DR: In this paper, a simple yet versatile procedure with advanced data interpretation scheme to identify key anisotropic parameters of thin films or coatings was introduced, which utilizes instrumented indentations and an inverse analysis to extract unknown parameters of elastic-plastic transversely isotropic materials.

TL;DR: In this article, the formation of adiabatic shear bands is automatically resolved using very fine meshes and the prediction of following cracks is achieved by means of a recently developed ductile fracture locus.

TL;DR: In this article, the authors derived necking limits and energy absorption capacities for bilayers under quasi-static biaxial stretching, and analyzed axisymmetric neck development in clamped circular bilayers subject to impulsive pressure loads.

TL;DR: In this article, the effective moduli of multiphase composites containing spherical particles or fibres are presented following the theoretical framework developed in Part I. The effect of the interfacial bonding conditions on the effect of these composites are examined.

TL;DR: In this article, the authors used the Taylor's hardening law to predict the indentation size effect (ISE) from both micro and nanoindentations by conical or pyramidal (Berkovich and Vickers) indenters.

TL;DR: In this paper, three kinds of constitutive models were employed to describe the time-dependent ratcheting behavior of SS304 stainless steel at room temperature and 973 K. The capabilities of these models to describe ratchets were discussed by comparing with the corresponding experimental results.

TL;DR: In this paper, numerical results based on a Rock Failure Process Analysis code (RFPA2D) are presented, which show the nucleation and growth of macro-cracks in relatively homogeneous and heterogeneous specimens under uniaxial tension.

TL;DR: In this article, the effect of damage due to particle debonding on the constitutive response of highly filled composites is investigated using two multiscale homogenization schemes: one based on a closed-form micromechanics solution, and the other on the finite element implementation of the mathematical theory of homogenisation.

TL;DR: In this article, the Torsional split Hopkinson bar (TSHB) was used for the studies in the shear strain rate range of 496-1000/s.

TL;DR: In this paper, a stochastic micromechanical model is presented for predicting probabilistic characteristics of elastic mechanical properties of an isotropic functionally graded material (FGM) subject to statistical uncertainties in material properties of constituents and their respective volume fractions.

TL;DR: In this article, the Bauschinger effect is intimately tied not only to plasticity but also to the damage state as well, and the authors illustrate the plasticity and damage influence by employing different definitions.

TL;DR: In this article, cyclic plasticity and viscoplasticity of a new nickel-based superalloy have been studied using the Chaboche unified constitutive equations, which has facilitated the design of an efficient test matrix and the development of a gradient-driven, non-linear optimisation algorithm.

TL;DR: In this paper, the authors investigated the reflection phenomenon of a set of coupled longitudinal waves from a free plane boundary of a thermo-elastic half-space with voids.

TL;DR: In this paper, a numerical integration of the exact Green function provided by Pan and Chou for the transversely isotropic media, the Hill tensor P is obtained for an arbitrarily oriented oblate spheroidal inclusion.

TL;DR: In this paper, an improved analysis for unidirectional composite delamination specimens is presented, which is based on the results of the last 30 years, and the main goal of the present model is the improvement of the global mode decomposition method including four mechanical deformations apart from simple beam theory: Winkler-Pasternak foundation, transverse shear, Saint-Venant effect and crack tip shear deformation.

TL;DR: In this paper, a probabilistic model of coating fragmentation under uniaxial tensile loading is developed and analytical expressions of the crack spacing evolution are obtained for small and large-strain fragmentation regimes.

TL;DR: In this article, a model of an ideal spider web has been created using the FEMAP pre-and post-processing software, and analyzed using the ABAQUS non-linear FE code.

TL;DR: In this paper, a strain induced crystallization model was proposed for blow molding process optimisation, based on a probabilistic approach, which can predict the variation of the mechanical behaviour of the perform during blow moulding and therefore the variability of final product properties.

TL;DR: In this paper, the influence of the indentation strain rate on the hardness of linear viscoelastic solids, power law creep solids and elastic-viscoplastic soliders is investigated.

TL;DR: Ferroelastic domain switching in a soft lead zirconate titanate (PZT) ceramic is measured by neutron diffraction on the texture diffractometer HIPPO with mechanical compression applied in situ as mentioned in this paper.

TL;DR: In this paper, a gas gun was used to introduce the damage by firing a hardened steel cube "point first" and the residual stresses were evaluated using two different experimental techniques involving X-ray diffraction: laboratory low energy monochromatic stress measurement, and high energy white beam synchrotron stress measurement.

TL;DR: In this article, a 180° domain wall is modelled as a singular surface across which a jump in the spontaneous polarization occurs and the domain wall can be thought of as an inhomogeneity which allows for the application of configurational or driving forces.

TL;DR: In this paper, a dynamic recovery term was introduced in the nonlinear kinematic hardening rule and incorporated into the unified Chaboche model, and the material parameters associated with this new term were determined and optimized to obtain a new set of optimised parameters.