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Fracture mechanics analysis of crack shapes due to cyclic loading in baria–silicate glass

  • K. Suputtamongkol (a1), K.J. Anusavice (a2) and J.J. Mecholsky (a2)

Abstract

The objective of this study was to determine the geometric characteristics associated with the critical crack caused by cyclic loading. In an attempt to simulate an intraoral loading condition, the Hertzian cyclic loading of baria–silicate glass was performed using a type 302 stainless steel indenter under an aqueous environment using clinically relevant parameters, i.e., a low loading frequency (∼3 Hz) and a low load level (⩽200 N). The indenter diameter (4.76 mm) approximated the cuspal radii of molar and premolar teeth. Ten bar specimens each were subjected to loading cycles of 0, 103, 104, and 105 cycles. A four-point bending test was used to quantify the severity of the strength reduction caused by the repeated loading test. There was a decrease in fracture stress after 103 cycles that was associated with cone crack formation. No significant additional reduction was found after 105 cycles for specimens tested both in air and in deionized water. Stress-corrosion fatigue accelerated the surface crack propagation rate in baria–silicate glass specimens. Four different crack geometries were identified along with failure mechanisms. Various fracture mechanics approaches were tested against observed crack geometries. The previously unobserved triangular crack geometry was found.

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a)Address all corresponding to this author.e-mail: dtkst@mahidol.ac.th

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1Walton, J.N., Gardner, F.M.Agar, J.R.: A survey of crown and fixed partial denture failures: Length of service and reasons for replacement. J. Prosthet. Dent. 56, 416 1986
2Foster, L.V.: Failed conventional bridge work from general dental practice: Clinical aspects and treatment needs 142 cases. Br. Dent. J. 168, 199 1990
3Moffa, J.P., Lugassy, A.A.Ellison, J.A.: Clinical evaluation of a castable ceramic material. J. Dent. Res. 67, 118 1988 abstract
4Anusavice, K.J.Phillip’s Science of Dental Materials, 10th ed.W.B. Saunders Company Philadelphia, PA 1996 63
5Peterson, I.M., Wuttiphan, S., Lawn, B.R.Chyung, K.: Role of microstructure on contact damage and strength degradation of micaceous glass-ceramics. Dent. Mater. 14, 80 1998
6Peterson, I.M., Parjares, A., Lawn, B.R., Thompson, V.P.Rekow, E.D.: Mechanical characterization of dental ceramics by Hertzian contacts. J. Dent. Res. 77, 589 1998
7Cai, H., Kalceff, M.S., Hooks, B.M.Lawn, B.R.: Cyclic fatigue of a mica-containing glass-ceramics at Hertzian contacts. J. Mater. Res. 9, 2654 1994
8Lawn, B.R., Padture, N.P., Guiberteau, F.Cai, H.: A model for microcrack initiation and propagation beneath Hertzian contacts in polycrystalline ceramics. Acta Met. Mater. 42, 1683 1994
9Lawn, B.R.: Indentation of ceramics with spheres: A century after Hertz. J. Am. Ceram. Soc. 81, 1977 1998
10Roesler, F.C.: Brittle fractures near equilibrium. Proc. Phys. Soc. (London) B69, 981 1956
11Lawn, B.R.: Fracture of Brittle Solids Cambridge University Press Cambridge, UK 1993 981–992
12Lawn, B.R., Wiederhorn, S.M.Johnson, H.H.: Strength degradation of brittle surfaces: Blunt indenters. J. Am. Ceram. Soc. 58, 428 1975
13Evans, A.G.: Strength degradation by projectile impacts. J. Am. Ceram. Soc. 56, 405 1973
14Murakami, Y.: Analysis of stress intensity factors of mode I, II and III for inclined surface cracks of arbitrary shape. Eng. Fract. Mech. 22, 101 1985
15Freiman, S.W., Onoda, G.Y.Pincus, A.G.: Mechanical properties of 3BaO-5SiO2 glass. J. Am. Ceram. Soc. 57, 8 1974
16Irwin, G.R.: Crack-extension force for a part-through crack in a plate. J. Appl. Mech. 29, 651 1962
17Freiman, S.W., Gonzales, A.C.Mecholsky, J.J.: Mixed mode fracture in soda lime glass. J. Am. Ceram. Soc. 62, 206 1979
18Hill, T.J., Mecholsky, J.J.Anusavice, K.J.: Fracture toughness versus crystallization in baria–silicate glass-ceramics. Abstract 1657, Am. Assoc. Dent. Res., 1995
19Widjaja, S., Ritter, J.E.Jakus, K.: Influence of R-curve behavior on strength degradation due to Hertzian indentation. J. Mater. Sci. 31, 2379 1996
20Hertzberg, R.W.Deformation and Fracture Mechanics of Engineering Materials, 4th ed.John Wiley & Sons, Inc. New York 1995 326–327
21Zhang, Y., Bhowmick, S.Lawn, B.R.: Competing fracture modes in brittle materials subject to concentrated cyclic loading in liquid environment. Monoliths. J. Mater. Res. 20, 2021 2005

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Fracture mechanics analysis of crack shapes due to cyclic loading in baria–silicate glass

  • K. Suputtamongkol (a1), K.J. Anusavice (a2) and J.J. Mecholsky (a2)

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