Nonsingular toughening and R-curve behavior in nominally pure alumina

G. B. May; K. E. Perry; J. L. Shull; J. S. Epstein; H. Okada; C. Scott; S. N. Atluri

doi:10.1007/BF00034564

Nonsingular toughening and R-curve behavior in nominally pure alumina

G. B. May, K. E. Perry, J. L. Shull, J. S. Epstein, H. Okada, C. Scott, S. N. Atluri

Mechanical Engineering

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1 Scopus citations

Abstract

Moire interferometry is employed to study toughening in medium to large grain size nominally pure alumina. The fracture scale length, which is characterized by the grain size of the alumina, is systematically varied from 35 to 102 μm. R curves are derived from bulk mode I compliance calculations for the differing grain sizes and from the near tip moire fringes. The level of material toughening that arises from the nonsingular processes of crack bridging and grain boundary friction are found by comparing the bulk and near tip moire R curves.

Original language	English
Pages (from-to)	361-375
Number of pages	15
Journal	International Journal of Fracture
Volume	59
Issue number	4
DOIs	https://doi.org/10.1007/BF00034564
State	Published - Feb 1993

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abstract = "Moire interferometry is employed to study toughening in medium to large grain size nominally pure alumina. The fracture scale length, which is characterized by the grain size of the alumina, is systematically varied from 35 to 102 μm. R curves are derived from bulk mode I compliance calculations for the differing grain sizes and from the near tip moire fringes. The level of material toughening that arises from the nonsingular processes of crack bridging and grain boundary friction are found by comparing the bulk and near tip moire R curves.",

author = "May, {G. B.} and Perry, {K. E.} and Shull, {J. L.} and Epstein, {J. S.} and H. Okada and C. Scott and Atluri, {S. N.}",

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AU - May, G. B.

AU - Perry, K. E.

AU - Shull, J. L.

AU - Epstein, J. S.

AU - Okada, H.

AU - Scott, C.

AU - Atluri, S. N.

PY - 1993/2

Y1 - 1993/2

N2 - Moire interferometry is employed to study toughening in medium to large grain size nominally pure alumina. The fracture scale length, which is characterized by the grain size of the alumina, is systematically varied from 35 to 102 μm. R curves are derived from bulk mode I compliance calculations for the differing grain sizes and from the near tip moire fringes. The level of material toughening that arises from the nonsingular processes of crack bridging and grain boundary friction are found by comparing the bulk and near tip moire R curves.

AB - Moire interferometry is employed to study toughening in medium to large grain size nominally pure alumina. The fracture scale length, which is characterized by the grain size of the alumina, is systematically varied from 35 to 102 μm. R curves are derived from bulk mode I compliance calculations for the differing grain sizes and from the near tip moire fringes. The level of material toughening that arises from the nonsingular processes of crack bridging and grain boundary friction are found by comparing the bulk and near tip moire R curves.

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ER -

Nonsingular toughening and R-curve behavior in nominally pure alumina

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