Showing papers in "Theoretical and Applied Fracture Mechanics in 2001"

TL;DR: In this paper, a mesh-free mesh-based fracture model is proposed for modeling brittle fracture, which is based on a cohesive view of materials, meaning that a finite material strength and work to fracture are included in the material description.

TL;DR: In this article, the authors discussed the fracture behavior of a cracked smart actuator on a substrate under thermal load, where the actuator is made of piezoelectric material with functionally graded material properties.

TL;DR: The MCA approach solves mechanical engineering problems ranging from those in material science to those in structures and constructions and computer simulation can also provide useful information in situations where direct measurements are not possible.

TL;DR: In this paper, simple shear molecular dynamics simulations using the embedded atom method (EAM) potentials were performed on single crystals and various parametric effects on the stress state and kinematics have been quantified.

TL;DR: In this article, a series of dynamic and static tensile-splitting experiments were performed on concrete and granite specimens to investigate the effect of induced damage on their tensile strength, which was performed as part of a larger effort investigating the penetration process into the two materials.

TL;DR: In this paper, a synergetic methodology of physical mesomechanics is developed to account for and substantiate well-known plastic-deformation and fracture mechanisms in solids under various loading conditions.

TL;DR: In this paper, a special finite element for a cracked Timoshenko beam is developed to model the structure for FEM analysis, and shape functions for rotational and translational displacements are used to obtain the consistent mass matrix for the cracked beam element.

TL;DR: In this paper, a fatigue damage model is developed to account for the damage accumulation process in bridges subjected to in-field traffic loading, and on-line strain gauge measurements are then made on the orthotropic steel deck structure of the Tsing Ma Bridge.

TL;DR: In this paper, the authors discuss potential pitfalls for applying models at both the atomic and continuum levels and propose a more precise terminology to better communicate results involving multiscale physical events.

TL;DR: In this paper, a link between the macroscopic and microscopic scale is proposed to bring macrofracture mechanics closer to micro fracture physics by using mesofracture simulation models.

TL;DR: In this paper, a hierarchical model for deformation and fracture at the micro-, meso-and macro-level for metals and composites is presented. But the authors focus on unifying the method of approach to be supported by tests and calculations.

TL;DR: Xu et al. as mentioned in this paper developed multi-axial creep damage constitutive equations for 0.5Cr0.5Mo0.25V ferritic steel at 590°C.

TL;DR: In this paper, the buckling and/or cracking of thin aluminium panels with an edge crack in tension was investigated and an empirical relation was obtained for the critical tensile stress.

TL;DR: In this article, a crack growth rate equation for a narrow transversely isotropic piezoelectric ceramic body under tensile loading was found for a finite crack in the midplane and parallel to the edges of the body.

TL;DR: In this article, the surface treatment (ion nitriding) of fretting fatigue and fatigue resistance of 34CrNiMo6 was investigated on a servo-hydraulic machine under tension for both treated and non-treated specimens.

TL;DR: In this article, the behavior of quasi-brittle materials eroded by water-driven particles (WDPs) is investigated and the specific energy of the erosion process is calculated based on the compressive stress-strain curves for the material.

TL;DR: In this paper, the analytical solutions for mode III interface crack that propagates along the interface of two joined media with weak dissimilarity and strong orthotropy were obtained by applying the theory of complex functions.

TL;DR: An overview of emerging needs for new developments in the field of inelastic behavior of materials is given in this article, where the application of plasticity models to support the design of durable microstructures and to engineer mesostructures to serve specified functions.

TL;DR: In this paper, an elastic-plastic finite element model is developed for 3D orthogonal cutting of discontinuous chips, where the tool is P20 while the workpiece is made of 6-4 brass.

TL;DR: In this paper, the elastic crack interaction with internal defects, such as micro-cracks, voids and rigid inclusions, is investigated for the purpose of analyzing crack propagation, and the elastic stress field is obtained using linear theory of elasticity for isotropic materials.

TL;DR: In this article, the underlying background of statistical microdamage mechanics, the fundamental partial differential equation of evolution of microdamage number density, two basic solutions, and the saturation of micro damage number density evolution are discussed.

TL;DR: In this paper, a simplified procedure is suggested to optimize a penetrator's nose shape using localized impactor-target interaction model in the cases of penetration into a semi-infinite target and into a target with a finite thickness.

TL;DR: In this paper, the authors used the boundary element method (BEM) to automate the modeling of fatigue cracks in linear elastic as well as elastic-plastic regimes and measured strain at several positions on the specimen surface near the crack mouth to monitor crack initiation, shape development and closure levels.

TL;DR: In this paper, a technique for defining the fractal dimension of the deformed specimen was considered by using surface relief images obtained from a scanning electron microscope, by subjecting the austenitic stainless steel specimen to a step-wise increase in load.

TL;DR: In this paper, a simple engineering method for obtaining approximate stress intensity factors of curved cracked beams is also used, taking into account the elastic crack tip stress singularity while using the elementary beam theory.

TL;DR: An elastic-plastic finite element analysis for a notched shaft subjected to multiaxial nonproportional synchronous cyclic tension/torsion loading is presented in this paper.

TL;DR: The macroscopic dislocation theory of as mentioned in this paper takes into account only the excess dislocations of one sign per unit macro-volume, which results in a great loss of information.

TL;DR: In this paper, the Thomas-Fermi-Dirac (TFD) model was used for the computation of internal stresses in thin films, and extreme high amplitude stresses are found in thin film next to the interface where dislocations do not appear.

TL;DR: In this article, a constitutive relation is developed to describe the nonlinear behavior of ferroelectric ceramics subjected to external stress and electric field, and the theoretical development considers each domain as an inclusion.

TL;DR: In this paper, the coupled electroelastic field in the constituent element is obtained by using the solution of an ellipsoidal inclusion embedded in an infinite homogeneous piezoelectric medium.