Numerical correlation of material structure weaknesses in anisotropic polycrystalline materials

Li, X. D.

doi:10.1007/bf01176239

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Shakedown Limits1

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Cited by 3 publications

(1 citation statement)

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“…When such bodies are brought together, the contact is made at asperities (higher bumps on the surface) and the pressure profi le becomes peaky, causing plastic fl ow at the asperity contact even though the nominal contact pressure is beneath the shakedown limit. analyses by kapoor et al (2002) andmorales-Espejel et al (1999) demonstrate the important roles roughness and lubricant viscosity play in shakedown limit for a real contact.…”

Section: Shakedown Limitsmentioning

confidence: 96%

The evolution and failure of pearlitic microstructure in rail steel – observations and modelling

Franklin

Garnham

Fletcher

et al. 2009

Wheel–Rail Interface Handbook

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Section: Shakedown Limitsmentioning

confidence: 96%

The evolution and failure of pearlitic microstructure in rail steel – observations and modelling

Franklin

Garnham

Fletcher

et al. 2009

Wheel–Rail Interface Handbook

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Computational assessment of composite structure weaknesses in short-fiber reinforced MMCs

2002

Mechanics of Materials

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K Variations and Anisotropy: Microstructure Effect and Numerical Predictions

Li¹

2002

Journal of Engineering Materials and Technology

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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 inhomogeneous stresses in broken grains, was determined for planar microcracks by using a weight function-based numerical technique. It has been found that the grain-orientation-geometry-induced local anisotropy produces large variations in K along front of microcracks, when the crack size is of the order of few grain diameters. Synergetic effect of grain orientation and geometry of broken grains control K variations and evolution along the microcrack front. The K variations may diminish at large crack sizes, signifying a shift of K calculation to bulk stress dependence from local stress dependence. Local grain geometry and texture may lead to K anisotropy, producing unusually higher/ lower K at a segment of the crack front. Either K variation or anisotropy cannot be ignored when assessing a microcrack.

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Numerical correlation of material structure weaknesses in anisotropic polycrystalline materials

Cited by 3 publications

References 26 publications

The evolution and failure of pearlitic microstructure in rail steel – observations and modelling

The evolution and failure of pearlitic microstructure in rail steel – observations and modelling

Computational assessment of composite structure weaknesses in short-fiber reinforced MMCs

K Variations and Anisotropy: Microstructure Effect and Numerical Predictions

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