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| Calculation of the Stress Intensity Factors of Three Dimensional Interface Crack Under Mechanical and Thermal Loading Using Universal Weight Function Method |
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Abstract Crack propogation in bimaterials and composites tends to occur at the interface when they withstand mechanical and thermal loadings, most cracks in engineering practice are three dimensional cracks, the traditional numerical methods such as finite element method and boundary element method for determination of transient stress intensity factor of interface crack under mechanical and thermal loadings are inefficient due to large amount of calculation. The universal weight function (UWF) is only dependent on the crack configuration and body geometry, and is independent of temperature fields and time, which avoids the repeated determinations of stress field for individual time instants and has an enhanced efficiency. The UWF method is especially suitable for determining the variation of transient stress intensity factors of an interface cracked body subjected to thermal and mechanical shock. The basic equation and finite element implementation of the UWF method for three dimensional Mode I, Mode II and Mode III interface cracks subjected to thermal and mechanical loadings is given in this paper based on Betti’s reciprocal theorem. Numerical results show that the UWF method is of good accuracy and satisfies the engineering application demand.
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Received: 21 May 2012
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| [1] |
. A 2-DIMENSIONAL HYBRID STRESS ELEMENT FOR STRESS ANALYSES OF ORIFICE PLATE[J]. , 2015, 36(4): 329-336. |
| [2] |
. Analytic solutions of two collinear fast propagating cracks of a stip in one-dimensional hexagonal piezoelectric quasicrystals[J]. , 2014, 35(2): 135-141. |
| [3] |
. Study on the interaction of tip fields between periodic cracks and periodic rigid line inclusions[J]. , 2014, 35(1): 95-100. |
| [4] |
. NUMERICAL MANIFOLD ANALYSIS OF COMPLEX CRACK PROBLEMS ON POLYGONAL ELEMENTS[J]. , 2013, 34(1): 38-46. |
| [5] |
. Study on thermal expansion properties of viscoelastic resin-based 3D braided composites[J]. , 2012, 33(4): 379-385. |
| [6] |
. The Interaction between a Screw Dipole in Inhomogeneity/Reinforced Phase and a Confocal Blunt Crack in Elliptical Inhomogeneity[J]. , 2012, 33(3): 288-295. |
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2013, Vol. 34 
