Showing papers in "Theoretical and Applied Fracture Mechanics in 2003"

TL;DR: In this article, the authors gave a brief account of the well-known solution for a line crack in a magnetoelectroelastic medium and derived the asymptotic form of the strain energy density function that was first given for the piezoelectric BaTiO 3 -CoFe 2 O 4 composite.

TL;DR: In this article, the authors proposed to use the strain energy density function as a failure criterion for a BaTiO3-CoFe2O4 two-phase composite, where the poling directions introduced magnetically and electrically can be different in addition to those for the applied magnetic and electric field.

TL;DR: In this paper, the fractal properties of rock fracture surface developed under tension were examined, and an automated surface scanning device was used to map the fractured surfaces using variogram analysis and power spectral density measurement.

TL;DR: In this article, the Mode-I transient response of a functionally graded piezoelectric medium is solved for a through crack under the in-plane mechanical and electric impact.

TL;DR: In this article, the authors applied damage mechanics to four problems: the instantaneous application of a constant stress to a brittle solid, the subsequent stress relaxation can reproduce the modified Omori's law for the temporal decay of aftershocks following an earthquake, and the solutions for application of constant rates of stress and strain.

TL;DR: In this paper, a debond crack in the adhesive-plate interface was observed by optical technique, and the total strain energy release rate was computed by the modified virtual crack closure technique, which was performed in order to investigate the influence of some design parameters such as the composite patch Young's modulus, the adhesive thickness and the pretension level on the debond.

TL;DR: In this article, the penetration performance of GT model military vehicle door subjected to the ballistic impact of a bullet with semispherical nose shape is investigated using 3-D nonlinear dynamic explicit finite element code LS-DYNA.

TL;DR: In this paper, the direction of poling with respect to a line crack and the material microstructure described by the constitutive coefficients was specified explicitly with reference to the applied magnetic field, electric field and mechanical stress, both normal and shear.

TL;DR: In this paper, the problem of a crack in a functionally graded piezoelectric material (FGPM) bonded to two elastic surface layers was solved by solving singular integral equations by application of the Gauss-Jacobi integration formula.

TL;DR: In this article, the case of poling parallel to the crack in a magnetoelectroelastic composite made of BaTiO 3 and CoFe 2 O 4 was investigated.

TL;DR: In this paper, the authors show how magnetic and electric poling normal to a line crack could greatly affect the interplay between volume change and shape change of the local continuum elements at both the macroscopic and microscopic scale level.

TL;DR: In this paper, the uniaxial ratcheting of SS304 stainless steel at high temperatures (300, 600 and 700 °C) was analyzed experimentally, and described by a cyclic constitutive visco-plasticity model.

TL;DR: In this paper, an analytical and experimental investigation of the fatigue crack growth behavior in attachment lugs subjected to a randomized flight-by-flight spectrum was conducted, where experiments were performed under a load spectrum and compared with the fatigue life prediction using the stress intensity factors by different methods.

TL;DR: A critical comparison of the energy release rate and energy density criteria is made using the example of a piezoelectric layer bonded between two half-spaces of a different elastic solid containing a crack normal to the interfaces.

TL;DR: In this article, the effects of physical aging on the kinetics of yielding in polycarbonate were investigated, and both tensile and compressive tests were performed over various loading rates and temperatures.

TL;DR: In this paper, the effects of time and temperature on physical aging of polycarbonate (PC) have been investigated by differential scanning calorimetry (DSC) and the results agree with the concept of lateral entanglement.

TL;DR: In this article, two basic mechanisms of toughening brittle solids are presented, which involve crack-tip shielding from crack deformation and/or crack bridging by introducing ductile particles in the crack wake region.

TL;DR: In this article, the authors considered a Yoffe crack in an infinite strip of functionally grated material (FGM) subjected to antiplane shear and obtained the dynamic stress intensity factor and strain energy density factor at the crack tip by using integral transforms and dual-integral equations.

TL;DR: In this paper, finite element analyses were conducted in order to evaluate the mode I and mode II stress intensity factors for inclined edge cracks under cyclic contact load under rolling and rolling-sliding condition.

TL;DR: In this paper, two combinations of mechanical and electrical loadings are considered for I-piezoelectric strip with semi-infinite electrode and the energy density factor criterion is applied to examine the fracture behavior near the electrode tip.

TL;DR: In this article, a combination of experiments, finite element analysis, non-destructive analysis, and image analysis was used to determine void nucleation, growth, and coalescence in aluminum notch specimens.

TL;DR: In this article, an elliptical crack subjected to uniform temperature in a thermopiezoelectric solid is investigated and the explicit expression of the field intensity factor is given out.

TL;DR: In this article, the surface contact interaction of a plane elliptical crack under normally incident tension-compression wave is solved by the method of boundary integral equations, and the contact forces and the displacement discontinuity of the crack edges are examined.

TL;DR: In this paper, the authors investigated the influence of morphology induced by cooling rate during molding, on the time-temperature dependence of fracture behavior of polypropylene (PP) and demonstrated that the relationship between deformation rate, temperature, and mechanical performance of PP is not only controlled by molecular relaxation processes but also strongly dependent on its morphology.

TL;DR: In this article, the authors investigated the mode III impact of a crack in an orthotropic functionally graded strip, where the shear moduli in two directions of the material are assumed to vary proportionately with gradient.

TL;DR: In this paper, an experimental study has been conducted in which strain fields were used to investigate the behavior of subsonic crack propagation along the interface of an isotropic-orthotropic bimaterial system.

TL;DR: In this article, the normal impact of a piezoelectric strip containing an off-center crack perpendicular to the boundaries is considered, and the solution involves solving a singular integral equation in the Laplace transform domain by application of the Gauss-Jacobi integration formula.

TL;DR: In this paper, a moving boundary model for crack nucleation and growth from surface flaws is presented, which concerns with chemical attack that results in material dissolution and a controlling mechanism for evolution is the rupture of a brittle corrosion-protective film that is built up along the corroding surface.

TL;DR: In this article, the problem of thermal stresses in an infinite isotropic plate rigidly bonded with an unsymmetrical, polygon-shaped reinforcement is analyzed within large deflection plate theory, using the equivalent inclusion method.

TL;DR: In this article, the dynamic electromechanical response of a cracked piezoelectric strip is considered, where the strip is sandwiched between two layers of elastic materials, and an internal crack and a crack terminated at interface are examined.