Sample Size Dependence of Crack|tip Microstructure and Stress ...

CMES | Sample Size Dependence of Crack-tip Microstructure and ...

The simulated results indicate that the crack propagation dynamics and stress distributions around the crack tip are strongly dependent on the microstructure ...

Sample Size Dependence of Crack-tip Microstructure and Stress ...

Abstract: The internal microstructure evolution and atomic stress distribution around the crack tip of a pre-cracked single crystal nickel with unequal ...

Sample Size Dependence of Crack-tip Microstructure andStress ...

The internal microstructure evolution and atomic stress distribution around the crack tip of a pre-cracked single crystal nickel with ...

Effective grain size dependence of crack propagation resistance in ...

In this work, comparable matrix microstructures with varying effective grain sizes were designed using different weld thermal simulations. Instrumented Charpy ...

Effects of component size, geometry, microstructure and aging on ...

The driving force for creep crack growth (CCG) is dominated by the local elastic–plastic stress in the creep damage zone around a crack tip. Temperature, ...

On the understanding of the effects of sample size on the variability ...

As such, failure within the critical bending thickness clearly depends on specific sample dimensions, the stresses ahead of the crack tip and throughout the.

Influence of microstructure variability on short crack behavior ...

(a) Volume fraction of active slip systems w.r.t. resolved shear stress ... crack is smaller than the prominent features in the microstructure ...

Crack tip microplasticity mediated by microstructure gradients

Therefore, for grain sizes about the size of dislocation structures, fHill is reduced, which increases the macroscopic stress. As the grain size ...

Crack growth equation - Wikipedia

A crack growth equation is used for calculating the size of a fatigue crack growing from cyclic loads. The growth of a fatigue crack can result in ...

Effect of Microstructure on Time Dependent Fatigue Crack Growth ...

Keywords: Hold time crack growth, microstructure, P/M superalloys, stress relaxation, precipitate size distribution. Abstract. A study was conducted to ...

Mechanisms of fatigue-crack propagation in ductile and brittle solids

mechanical, microstructural and environmental factors that locally reduce the near-tip stress intensity, i.e., to promote R-curve toughening. For example, the ...

An experimental study of residual stress and direction-dependence ...

(c). Geometry and dimensions of the C(T) sample used for residual stress measurements using neutron diffraction and fatigue crack growth testing. Dotted line ...

Microstructural Crack Tip Plasticity Controlling Small Fatigue Crack ...

The fatigue crack growth resistance is controlled through the crack tip “plasticity”, and the effect of the associated microstructure becomes significant when ...

(PDF) A microstructure-sensitive driving force for crack growth

By modelling different crack lengths, the diminution of the microstructural sensitivity with increasing crack length is quantified and a critical length defined ...

A Microstructure-Based Time-Dependent Crack Growth Model for ...

crack-tip element size. To verify the model, Eq. [4] was integrated ... ahead of a crack tip subjected to the near-tip stress field characterized by ...

Computational micromechanics analysis of cyclic crack-tip behavior ...

their fine microstructure and the reduced defect size associated with ... Stress state dependence of the cyclic ratchetting behavior of two rail steels.

CHARACTERIZATION OF THE CRACK PROPAGATION IN A ...

the size effect is taken into account, a microstructural dependence of the material must be ... & García, E.I.,. Stress concentration and size effect in fracture ...

A Multiple Specimen Test Technique to Determine Fatigue Crack ...

It is observed that in mode I fatigue data show a strong dependence of crack growth rate da/dN on LiK1, and there exists a threshold stress intensity range ...

modeling the influence of crack path deviations - TSAPPS at NIST

Stress corrosion cracks typically nucleate at a stress concentration in the surface and propagate away from the surface on a plane perpendicular to the ...

Fatigue crack propagation behavior of a micro-bainitic TRIP steel

Furthermore, the microstructure in the TM samples is significantly more homogeneous, which leads to a more uniform distribution of residual stresses near the ...