Probabilistic mesomechanical fatigue crack nucleation model
Article Abstract:
A probabilistic mesomechanical crack nucleation model is suggested to relate the microstructural material heterogeneities to the statistical scatter in the macrostructural response. The macrostructure is modeled as an assembly of microelements. Cracks nucleate within the microelements and grow from the microelements to final fracture. A micromechanical slip band decohesion model together with a Paris law crack growth model are employed with first order reliability methods and Monte Carlo simulation to obtain the distribution of fatigue life for the macrostructure.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1997
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Compressive fatigue of a plasma sprayed ZrO2-8 wt% Y2O3 and ZrO2-10 wt%NiCrAlCoY TTBC
Article Abstract:
An analysis of high cycle fatigue nature of ZrO2-8 wt% Y2O3 and ZrO2-10 wt%NiCrAlCoY thick thermal barrier coatings in the unsealed and CrO2 dip sealed conditions detected the presence of the compressive fatigue limits for the four coating systems at room temperature (RT). The RT fatigue life increases with sealing. At R = 0.6 (R = minimum/maximum compressive stress), the ratio of the peak cyclic stress and ultimate compressive strength of the Yttria Stabilized Zirconia tubular specimens is almost 0.09.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1995
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Shear strength of a thermal barrier coating parallel to the bond coat
Article Abstract:
An adaptation of the Iosipescu shear test method was used for a limited test program demonstrating valid ways to determine the shear strength of thermal barrier coating (TBC) materials, parallel to bond surface between TBC and substrate. Static and fatigue strengths did not show marked differences from tensile properties for comparable TBC materials.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1998
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