ISSN:
1013-9826
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:
In this paper detailed results of computational 3D fatigue crack growth simulations willbe presented. The simulations for the crack path assessment are based on the DBEM code BEASY,and the FEM code ADAPCRACK 3D. The specimen under investigation is a SEN-specimensubject to pure anti-plane or out-of-plane four-point shear loading. The computational 3D fractureanalyses deliver variable mixed mode II and III conditions along the crack front. Special interest istaken in this mode coupling effect to be found in stress intensity factor (SIF) results along the crackfront. Further interest is taken in a 3D effect which is effective in particular at and adjacent to thetwo crack front corner points, that is where the crack front intersects the two free side surfaces ofthe specimen. Exactly at these crack front corner points fatigue crack growth initiates in theexperimental laboratory test specimens, and develops into two separate anti-symmetric cracks withcomplex shapes, somehow similar to bird wings. The computational DBEM results are found to bein good agreement with these experimental findings and with FEM results previously obtained.Consequently, also for this new case, with complex 3D crack growth behaviour of two cracks, thefunctionality of the proposed DBEM and FEM approaches can be stated
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.129.pdf
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