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Transient thermo-mechanical analysis of dynamic curving cracks in functionally graded materials.
- Source :
-
Acta Mechanica . Jul2012, Vol. 223 Issue 7, p1485-1506. 22p. - Publication Year :
- 2012
-
Abstract
- Mixed-mode dynamic crack growth behavior along an arbitrarily smoothly varying path in functionally graded materials (FGMs) under transient thermo-mechanical loading is studied. An asymptotic analysis in conjunction with displacement potentials is used to develop transient thermo-mechanical stress fields around the propagating crack-tip. Asymptotic temperature field equations are derived for exponentially varying thermal properties, and later, these equations are used to derive transient thermo-mechanical stress fields for a curving crack in FGMs. The effect of the transient parameters (loading rate, crack-tip acceleration, and temperature change) and temperature gradient on the maximum principal stress and circumferential stress associated with the propagating crack-tip is discussed. Finally, using the minimum strain energy density criterion, the effect of temperature gradient, crack-tip speeds, and T-stress on crack growth directions is determined and discussed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00015970
- Volume :
- 223
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Acta Mechanica
- Publication Type :
- Academic Journal
- Accession number :
- 77263058
- Full Text :
- https://doi.org/10.1007/s00707-012-0661-9