SEDL / STP / STP1220-EB / STP14581S

Analysis of the Effect of Transformation-Induced Shear Strains on Stability and Crack Growth in Zirconia-Containing Ceramics

Stam, GTM
PhD Student, Delft University of Technology, Lab. for Engineering Mechanics, GA Delft,

van der Giessen, E
Professor, Delft University of Technology, Lab. for Engineering Mechanics, GA Delft,

Pages: 16    Published: Jan 1995

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Abstract

Mode I crack growth is studied in ceramics which undergo a stress-induced martensitic phase transformation that leads to a substantial increase of toughness. The transformation involves both dilatant and shear transformation strains. Full crack growth analyses are carried out numerically and it is demonstrated that the transformation shear strains are a major contribution to toughening.