ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The evaluation of the generalized stress intensity factor (GSIF) and T-stress for the caseof the surface crack terminating perpendicular to the interface between two orthotropic materials isconsidered. The combination of the discretization, numerical and analytic methods is used. Thediscretization method, such as common finite element method (FEM), is served to include theboundary condition to the GSIF solution and to describe the remote stress and displacement fieldregion with the low influence of the singularity of the crack tip. The Lekhnickii-Eshelby-Stroh(LES) formalism is used to derive the approach solution for the near stress field of the crack tip andthe singularity problem in an orthotropic 'trimaterial' using the Schwartz-Neumann's alternatingtechnique. The problem of the stress singularity is treated as a non-linear eigenvalue problem, whichleads to the characteristic equation for the stress singularities of the form rδ −1 , 0 〈δ 〈1. Two waysof the evaluation of the GSIF are presented, using the reciprocal theorem ψ -integral) and the crackmodel by means of continuous distribution of dislocations. Both results are compared for a specificmaterial. The continuous distribution of dislocations technique is also used for determination of theT-stress
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.567-568.137.pdf
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