Fractographic Analysis of Biaxial Failure in Ceramics

JJ Mecholsky; RW Rice

doi:10.1520/STP37441S

SYMPOSIA PAPER Published: 01 January 1984

STP37441S

Fractographic Analysis of Biaxial Failure in Ceramics

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Borosilicate and silica glass, Pyroceram 9606 glass ceramic, and polycrystalline magnesium fluoride ceramic disks were biaxially stressed and the fracture surfaces examined to determine the size of the fracture surface features. The fracture stress (σ)-fracture mirror radii (r_j) relationship σ j m = M j where M_j are the mirror constants (j = 1, 2, 3) and m is constant, usually 0.5, is shown to hold for uniaxial, flexural, and biaxial loading conditions. This implies that any local differences of the stress state at the fracture-initiating site are dissipated by the time the crack-front forms mist, hackle, and crack branching, making measurement of the boundaries of these features a general fracture characteristic.

Author Information

Mecholsky, JJ

Sandia National Laboratories, Albuquerque, N.M.

Rice, RW

Ceramics and Glass Materials Branch, Naval Research Laboratory, Washington, D.C.

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Details

Developed by Committee: E08

Pages: 185–193

DOI: 10.1520/STP37441S

ISBN-EB: 978-0-8031-4896-3

ISBN-13: 978-0-8031-0215-6

Fractographic Analysis of Biaxial Failure in Ceramics

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