ISSN:
1662-7482
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:
This work assesses the Crack Compliance Method (CCM), which has been extensivelyused for the experimental evaluation of residual stresses, by the Finite Element Method (FEM) tovalidate its experimental applicability through numerical evaluation. The CCM is a very powerfulmethod that is based on Fracture Mechanics theory, but its experimental application and set up hasnot been totally scientifically validated. In this paper, a numerical evaluation is presented on thebasic applications of the CCM. The assessment of the CCM is performed on bending beams withand without prior straining history. To determine the best position and orientation of the straingages, as well as the optimum number of readings, a number of numerical simulations where alsoperformed for the correct performance of the experimental evaluation of the CCM. The priorstraining history condition, in the analyzed components, is induced by an axial pulling before thebeam is bent. Three levels of preloading are considered: low, medium and high (which are related tothe yield strain of the simulated material); Isotropic and Kinematic hardening rules are alsoconsidered. After the residual stress field is induced by bending, a slot cutting is simulated and thestrain relaxation produced is captured, which is used later in the CCM program for thequantification of the original residual stress field. The results obtained in this work, provide aquantitative demonstration of the effect of hardening strain on the distribution of the residual stressin beams. In the same manner, the theoretical formulation of the CCM has been evaluatedvalidating the application of this method for the determination of residual stress fields in mechanicalcomponents
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/38/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.13-14.173.pdf
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