... a microstructure’s fracture resistance. However, indirectly it may weaken a microstructure by favoring the formation of microcracks. Significantly higher crack formation in grain interior while lower interfacial energy dissipation in comparison to interfaces indicates overall lower fracture strength of grain...

... of oxygen diffusivity and pressure factor. In the case of an existing surface microcrack, oxygen tends to accumulate around the crack tip due to the high stress level presented near the crack tip, leading to localized material embrittlement and promotion of rapid crack propagation. The two internal...

... of uniaxial tensile response is compared with experimental data. 08 06 2010 08 12 2010 09 12 2010 09 12 2010 elastic constants filled polymers finite element analysis fracture mechanics glass fibre reinforced plastics interface structure microcracks tensile strength...

... technique formalized in the present paper is a reliable tool capable of correctly evaluating fatigue damage in engineering materials subjected to multiaxial cyclic loading paths. 01 07 2008 05 12 2008 09 03 2009 fatigue microcracks stress-strain relations torsion multiaxial...

...D. Kumar; T. R. Bieler; P. Eisenlohr; D. E. Mason; M. A. Crimp; F. Roters; D. Raabe Simkin et al. (2003, “A Factor to Predict Microcrack Nucleation at Gamma-Gamma Grain Boundaries in TiAl,” Scr. Mater., 49(2), 149–154) proposed a relationship for predicting crack initiation in γ - Ti Al...

..., shows an elastoplastic response. Microcracking at the corners of sharp indentations was not observed in amorphous nanoporous films, and rarely in harder, crystalline nanoporous films. High-resolution scanning electron microscopy revealed a collapse of the nanoporous structure beneath the indentor tip...

...–matrix debonding using the modified Mori–Tanaka model. The associated damage variables are defined, and the stiffness reduction law dependent on these variables is established. The stiffness of a random fiber composite containing random matrix microcracks and imperfect interfaces is then obtained from...

... D min 2 D max This assumption is due to the fact that critical damage strength is directly related to the number of possible pre-existing microcracks inside the particles, and the larger a particle is, the greater the number of initial defects that can be found. Using Eq. 22...

... conditions. slip viscoplasticity Young's modulus Poisson ratio work hardening fatigue cracks microcracks austenitic stainless steel nickel alloys 10 February 2003 23 July 2003 22 01 2004 Contributed by the Materials Division for publication in the JOURNAL...

... propagates by the growth of voids or microcracks ahead of the main crack and coalescence with the main crack. The energy release rate G 0 with phase angle ψ = 0 for type A coating and type B coating was, respectively, 14.54 ∼ 25.88 J / m 2 and 11.88 ∼ 16.21 J / m 2 . The corresponding interface fracture...

... these defects grow, join and build a crack process zone until complete rupture will finally occur. This zone is bounded by the fictitious crack tip and the real crack tip and shall be called the damaged bond zone. In this area which contains a reasonable amount of microcracks the contact is still governed...

...Xu-Dong Li Computer experiments were performed on simulated polycrystalline material samples that possess locally anisotropic microstructures to investigate stress intensity factor ( K ) variations and anisotropy along fronts of microcracks of different sizes. The anisotropic K , arising from...

...D. L. Ball; W. S. Chan The ply constitutive relations of an energy-based model for distributed microcracking in continuous fiber reinforced metal matrix composites are presented. Simple models for damage progression are used in conjunction with these damage dependent constitutive relations to allow...

... compared with other heat treatment conditions. Typical damage modes of Ti MMC’s, such as fiber/matrix debonding and matrix microcracking, were seen in all heat treatments. A micromechanics model based on the Mori-Tanaka averaging scheme was implemented to simulate the effects of micro-cracking induced...