Showing papers in "Engineering Fracture Mechanics in 1998"

TL;DR: In this paper, a fracture mechanics technique to quantitatively measure the adhesion or interfacial fracture resistance of interfaces in thin film structures is described, which is expected to have important implications for long term device reliability.

TL;DR: In this paper, a method for rendering ordinary beam-spring networks elastically uniform is also given for predicting brittle fracture in homogeneous, isotropic materials, based on Voronoi diagrams with random geometry.

TL;DR: In this paper, the crack propagation and coalescence in brittle materials have been modeled by using the rock failure process analysis code, RFPA(2D), and the results have been validated by reported experimental observations.

TL;DR: In this article, a virtual internal bond (VIB) model with cohesive interactions between material particles is proposed as an alternative approach to modeling fracture, where a phenomenological "cohesive force law" is assumed to act between "material particles" which are not necessarily atoms.

TL;DR: In this article, a probabilistic model for the growth of corrosion pits in aluminum alloys in aqueous environments is presented, which incorporates the evolution of local damage at each particle and the corrosion pit growth involving interactions with neighboring particles.

TL;DR: In this paper, a quasicontinuum (QC) method is applied to crack tip deformation and is shown to account for both brittle fracture and crack tip dislocation emission.

TL;DR: A survey of several experimental methods to determine the fractal dimension, Df, according to the roughness of fracture surfaces can be found in this paper, where the authors discuss the experimental results reported in the bibliography and the relations inferred to correlate fractal dimensions with mechanical properties.

TL;DR: In this paper, fracture energy for bimaterial interfaces remains constant as long as the crack lies within the interface, and an accurate crack profile is obtained from the linear elastic fracture mechanics (LEFM) analysis.

TL;DR: In this paper, the authors present a method for computing T-stresses for a number of rectangular components and circular disks under different loadings, in the form of tables, diagrams and polynomials.

TL;DR: In this article, the vibration characteristics of a uniform Bernoulli-Euler beam with a single edge crack were investigated using a modified line-spring model, and the natural frequencies and corresponding mode shapes were determined for uniform beams having edge cracks of different depths.

TL;DR: In this paper, the authors apply the computational cell model to predict ductile crack growth measured in experiments performed on surface-cracked, thick plates fabricated from a ferritic pressure vessel steel.

TL;DR: In this article, an analysis of the microscratch test is presented for the case when extensive spalling occurs ahead of the scratch, and it is shown that the extent of the spall is inversely proportional to the fourth root of the toughness.

TL;DR: In this paper, a non-local stress condition for crack initiation and propagation in brittle materials is presented, expressed in terms of normal and tangential traction components acting on a physical plane segment (damage zone) of specified length.

TL;DR: In this article, an algorithm for finite element analysis of dynamic elastic-plastic fracture mechanics is presented, which allows crack propagation in any direction, but does not require remeshing or the definition of new contact surfaces.

TL;DR: In this article, the interlaminar fracture behavior of a unidirectionally reinforced composite under the full range of in-plane loading conditions has been investigated and the parameters for a fracture criterion for the composite under consideration have been determined.

TL;DR: In this paper, a theoretical and numerical treatment of a finite crack subjected to an anti-plane shear impact load in a media with spatially varying elastic properties is provided, where the elastic properties of the interfacial layer are assumed to vary continuously between that of two dissimilar homogeneous bonding layers.

TL;DR: In this paper, a concept of the stress intensity factors of an interface crack is discussed, and various types of specimens are tested experimentally for investigating the mixed mode fracture toughness criterion of the interface crack.

TL;DR: In this article, the opening and closure behavior of a semi-circular moving crack has been studied using an elastic-plastic finite element model and the effects of different node release schemes, the refinement of the finite element mesh and the initial crack length have been studied.

TL;DR: In this paper, the authors considered the plane strain thermal stress problem for an interface crack in a homogeneous substrate with a graded coating, and solved the problem for various composition profiles in the coating, including 100% ceramic, and for various values of the heat conductivity index describing the insulation condition on the crack surface.

TL;DR: In this article, a 9.1μm-thick phenol-formaldehyde polymer film on stainless steel was tested with indentation, scratching and edgeloading of fine lines.

TL;DR: In this paper, the validity of the 3D virtual crack closure technique, 3D VCCT, with nonorthogonal finite element meshes for calculating mode I stress intensity factors is assessed.

TL;DR: In this article, the authors generalize the analytical virtual crack extension method presented by Lin and Abel by providing the higher order derivatives of energy release rate due to crack extension for multiply cracked bodies.

TL;DR: In this article, the effect of constraint loss on the reference temperature, T0, at which the median fracture toughness of 1-T size specimens equals 100 MPa m for ferritic steels in the transition region, is examined.

TL;DR: The results of a mode III (tearing mode) fracture toughness investigation with the method of anti-clastic plate bending (ACPB) or equivalently the plate twist method are reported in this article.

TL;DR: In this article, a continuum damage mechanics model for the dislocation creep response associated with the growth of parallel planar mesocracks in initially isotropic materials is presented, which describes simultaneously different damage development in tension, compression and torsion, damage-induced anisotropy, as well as different creep properties in tension and compression.

TL;DR: In this article, an experimental investigation on the mixed mode response of concrete interfaces is reported, where large simulated rock/concrete bimaterial specimens are subjected to the complex stress field that exists along a dam/foundation interface.

TL;DR: In this paper, the results of these environmental tests were compared with those obtained in laboratory air to characterize the effect of aging treatment on corrosion fatigue susceptibility and showed that overaging treatments used to improve grain boundary characteristics and increase the intergranular SCC resistance might not guarantee an equivalent improvement in the resistance to transgranular CF cracking.

TL;DR: In this paper, a three-dimensional mesh generating procedure for tubular joints is changed to a procedure similar to a two-dimensional case by mapping circles in 2D planes to 3D intersection curves between tubular members.

TL;DR: In this paper, a fracture mechanics test method based on fracture mechanics concepts is applied to measure fatigue crack growth rates for an adhesive material in a bondline double cantilever beam specimen containing a cohesive crack.

TL;DR: In this paper, a continuous cracked bar vibration theory is developed for longitudinal vibration of rods with an edge crack, and the results of three independent evaluations of the lowest natural frequency of longitudinal vibrations of a bar with a single edge crack are presented: the continuous cracked bars vibration theory, the lumped crack bar vibration analysis, and experimental results obtained on aluminum bars with fatigue cracks.