Affiliation:
1. George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
Abstract
Dynamic fracture in two-phase Al2O3/TiB2 ceramic composite microstructures is analyzed explicitly using a cohesive finite element method (CFEM). This framework allows the effects of microstructural heterogeneity, phase morphology, phase distribution, and size scale to be quantified. The analyses consider arbitrary microstructural phase morphologies and entail explicit tracking of crack growth and arbitrary fracture patterns. The approach involves the use of CFEM models that integrate cohesive surfaces along all finite element boundaries as an intrinsic part of the material description. This approach obviates the need for any specific fracture criteria and assigns models the capability of predicting fracture paths and fracture patterns. Calculations are carried out using idealized phase morphologies as well as real phase morphologies in actual material microstructures. Issues analyzed include the influence of microstructural morphology on the fracture behavior, the influence of phase size on fracture resistance, the effect of interphase bonding strength on failure, and the effect of loading rate on fracture.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference61 articles.
1. Tomar, V., Zhai, J., and Zhou, M., 2004, “Bounds for Element Size in a Variable Stiffness Cohesive Finite Element Model,” to appear in Int. J. Numer. Methods Eng.
2. Needleman, A.
, 1987, “A Continuum Model for Void Nucleation by Inclusion Debonding,” ASME J. Appl. Mech., 38, pp. 289–324.
3. Tvergaard, V.
, 1990, “Effect of Fibre Debonding in a Whisker-Reinforced Material,” Mater. Sci. Eng., A, 125, pp. 203–213.
4. Shabrov, M. N., and Needleman, A., 2002, “An Analysis of Inclusion Morphology Effects on Void Nucleation,” Modell. Simul. Mater. Sci. Eng., 10, pp. 163–183.
5. Needleman, A.
, 1990, “An Analysis of Decohesion Along an Imperfect Interface,” Int. J. Fract., 42, pp. 21–40.
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