DOI: 10.1111/j.1151-2916.1976.tb10930.x. Strength Degradation of Brittle Surfaces: Sharp Indenters

Strength Degradation of Brittle Surfaces: Sharp Indenters

10.1111/j.1151-2916.1976.tb10930.x

Crossref journal-article

Wiley

Journal of the American Ceramic Society (311)

Abstract

A theory of strength loss for brittle surfaces in contact situations, developed in a previous paper for “blunt” indenters, is extended to the case of “sharp” indenters. A prior fracture mechanics analysis of crack growth beneath ideal cone indenters serves as the basis for predetermining the prospective surface degradation of ceramic components in service. Compared to blunt indenters, sharp indenters can cause severe degradation at lower contact loads. However, at high loads, the extent of degradation becomes remarkably insensitive to details in the indenter geometry. Essential theoretical predictions are verified by bend tests on glass slabs. Effects of indenter “sharpness” and initial specimen surface flaw state are investigated systematically, along with some secondary rate effects in the contact process. The possibility of minimizing degradation via adjustment of material parameters (including hardness) or surface condition (e.g. residual stresses, frictional properties) is briefly discussed.

Bibliography

LAWN, B. R., FULLER, E. R., & WIEDERHORN, S. M. (1976). Strength Degradation of Brittle Surfaces: Sharp Indenters. Journal of the American Ceramic Society, 59(5â6), 193â197. Portico.

Authors 3

B. R. LAWN (first)
E. R. FULLER (additional)
S. M. WIEDERHORN (additional)

References 10 Referenced 52

10.1111/j.1151-2916.1975.tb19015.x
10.1007/BF00541038
{'key': 'e_1_2_1_4_2', 'first-page': '1049', 'article-title': 'Indentation Fracture: Principles and Applications', 'volume': '6', 'author': 'Lawn B. R.', 'journal-title': 'ibid'} / ibid / Indentation Fracture: Principles and Applications by Lawn B. R.
{'issue': '12', 'key': 'e_1_2_1_5_2', 'first-page': '2016', 'article-title': 'Equilibrium Penny‐Like Cracks in Indentation Fracture', 'volume': '10', 'author': 'Lawn B. R.', 'journal-title': 'ibid'} / ibid / Equilibrium Penny‐Like Cracks in Indentation Fracture by Lawn B. R.
{'issue': '7', 'key': 'e_1_2_1_6_2', 'first-page': '1236', 'article-title': 'On the Mode of Chipping Fracture in Brittle Solids', 'author': 'Lawn B. R.', 'journal-title': 'ibid'} / ibid / On the Mode of Chipping Fracture in Brittle Solids by Lawn B. R.
10.1111/j.1151-2916.1969.tb13350.x
{'issue': '87', 'key': 'e_1_2_1_8_2', 'first-page': '383', 'article-title': 'Effect of Transverse Scratches on the Strength of Sheet Glass', 'volume': '21', 'author': 'Holland A. J.', 'year': '1937', 'journal-title': 'J. Soc. Glass Technol'} / J. Soc. Glass Technol / Effect of Transverse Scratches on the Strength of Sheet Glass by Holland A. J. (1937)
S. M.WiederhornandBrian Lawn;unpublished work.
{'issue': '2', 'key': 'e_1_2_1_10_2', 'first-page': '45', 'article-title': 'Effect of Loading Time and Environment on the Indentation Hardness of Glass', 'volume': '14', 'author': 'Gunasekera S. P.', 'year': '1973', 'journal-title': 'Phys. Chem. Classes'} / Phys. Chem. Classes / Effect of Loading Time and Environment on the Indentation Hardness of Glass by Gunasekera S. P. (1973)
10.1080/14786436808227310

Dates

Type	When
Created	19 years, 2 months ago (June 6, 2006, 12:31 p.m.)
Deposited	2 years ago (Aug. 31, 2023, 7:59 a.m.)
Indexed	2 months ago (June 27, 2025, 9:05 p.m.)
Issued	49 years, 4 months ago (May 1, 1976)
Published	49 years, 4 months ago (May 1, 1976)
Published Online	19 years, 3 months ago (June 2, 2006)
Published Print	49 years, 4 months ago (May 1, 1976)

Funders 0

None

BibTeX

@article{LAWN_1976, title={Strength Degradation of Brittle Surfaces: Sharp Indenters}, volume={59}, ISSN={1551-2916}, url={http://dx.doi.org/10.1111/j.1151-2916.1976.tb10930.x}, DOI={10.1111/j.1151-2916.1976.tb10930.x}, number={5–6}, journal={Journal of the American Ceramic Society}, publisher={Wiley}, author={LAWN, B. R. and FULLER, E. R. and WIEDERHORN, S. M.}, year={1976}, month=may, pages={193–197} }

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