A crack of arbitrary size and orientation near bimaterial interfaces between dissimilar thermopiezoelectric materials is considered . A system of singular integral equations for the unknown thermal analog of dislocation density defined on the crack faces is derived by way of the Stroh's formulation and the thermoelectroelastic Green's fUflctions developed recently. The stress and electric displ...

Fatigue crack growth behavior of AZ61 magnesium alloy was investigated in low humidity (55% relative humidity) and 3.5% NaCl spray environments under various stress ratios. Fatigue crack growth rates became higher with increasing load ratio for both environments. However, the results of fatigue crack growth test under 3.5% NaCl spray environment showed lower fatigue crack propagation rate compa...

The interaction between an edge dislocation and a crack in the presence of uniform applied tension and shear is considered. Emphasis is placed on the effects of partial closure and crack-face friction. Representative results are given.

a new approach for analyzing cracked problems in 2d orthotropic materials using the well-known element free galerkin method and orthotropic enrichment functions is proposed. the element free galerkin method is a meshfree method which enables discontinuous problems to be modeled efficiently. in this study, element free galerkin is extrinsically enriched by the recently developed crack-tip orthot...

Some Characteristic behavior of the T e (Atluri, Nishioka and Nakagaki (1984)) is identi®ed in this paper through an extensive numerical study. T e is a near tip contour integral and has been known to measure the magnitude of singular deformation ®eld at crack tip for arbitrary material models. In this paper, T e is found to behave quite differently for different choices of near tip integral co...

The scattering of SH-waves by a Griffith crack in an infinitely long elastic strip situated at an asymmetric position has been analyzed. Applying Fourier transform, the mixed boundary value problem has been reduced to the solution of dual integral equations which finally has been reduced to the solution of a Fredholm integral equation of second kind. The numerical values of stress intensity fac...

The finite element method has been largely used to analyze mechanical problems and, in particular, to obtain the response of cracked structures. One of the major issues in using the method is mesh generation. Nowadays, several automatic mesh generation algorithms are available for two-dimensional models. Crack analysis imposes severe requirements on automatic mesh generation. It is not uncommon...

In this article, a three-dimensional finite element model (FEM) is used to predict the crack growth at weld toe of pre-fatigued T-joint that was repaired with remelting technique. The numerical models were developed using MSC.Marc software. Fatigue life estimated by integrating Paris-Erdogan law. stress intensity factors are obtained virtual closure technique (VCCT). T-welded joints, made S355 ...

A 2-dimensional, elastic-plastic finite element model has been developed to simulate plasticity induced crack closure in slanted and deflected cracks growing outside the small scale yielding (SSY) regime. The finite element model allows for contact between deformable surfaces to capture the complex contact interaction between the crack faces. Coulomb’s friction law has been used to model fricti...