Fracture Toughness of Whisker Reinforced Ceramics

Abstract:

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By use of a probabilistic fracture model, a numerical simulation method for deformation and fracture behavior of whisker reinforced ceramics is developed first. A crack in whisker reinforced ceramics is regarded as the crack with a cohesive stress acting on the crack surface, and then the tension-softening relation is derived on the basis of a micromechanical study. After the numerical simulation method is constructed by incorporating the tension-softening relation in an FEM scheme, we simulate the load-load point displacement relationship for an edge-cracked bend specimen of a SiC whisker/alumina composite. The fracture toughness determined from the simulated maximum load is consistent with that obtained from experiment.

Info:

Periodical:

Edited by:

P. W. R. Beaumont and Y. Shibuya

Pages:

41-46

DOI:

10.4028/www.scientific.net/KEM.430.41

Citation:

M. Katagiri et al., "Fracture Toughness of Whisker Reinforced Ceramics", Key Engineering Materials, Vol. 430, pp. 41-46, 2010

Online since:

March 2010

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$35.00

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