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:
We present a method for computing the stress intensity factors in bimaterials based on thegoal oriented finite element error estimate. The goal oriented analysis focuses on computing thebounds on the local quantities of interest, e.g. local stresses, local displacements, stress intensityfactors etc, of a structure, and with the bounds obtained on the coarse finite element mesh we canobtain the quantities of interest with nearly the same accuracy as that obtained on the fine finiteelement mesh. In this paper the stress intensity factors in bimaterials are first formulated as explicitcomputable linear function of the displacements by means of the two-points extrapolation method.Then the goal oriented finite element method is used to compute the lower and upper bounds on thestress intensity factors, and the average of the bounds is considered as a prediction of the stressintensity factor. At last, the stress intensity factors, 0 K and r K , in bimaterials are computed with theproposed method to show its efficiency
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.249.pdf
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