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An Approach for Assessing Delamination Propagation Capabilities in Commercial Finite Element CodesAn approach to assessing the delamination propagation capabilities in commercial finite element codes is presented and demonstrated for one code. For this investigation, the Double Cantilever Beam (DCB) specimen and the Single Leg Bending (SLB) specimen were chosen for full three-dimensional finite element simulations. First, benchmark results were created for both specimens. Second, starting from an initially straight front, the delamination was allowed to propagate. Good agreement between the load-displacement relationship obtained from the propagation analysis results and the benchmark results could be achieved by selecting the appropriate input parameters. Selecting the appropriate input parameters, however, was not straightforward and often required an iterative procedure. Qualitatively, the delamination front computed for the DCB specimen did not take the shape of a curved front as expected. However, the analysis of the SLB specimen yielded a curved front as may be expected from the distribution of the energy release rate and the failure index across the width of the specimen. Overall, the results are encouraging but further assessment on a structural level is required.
Document ID
20080015886
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Krueger, Ronald
(National Inst. of Aerospace Hampton, VA, United States)
Date Acquired
August 24, 2013
Publication Date
September 17, 2007
Subject Category
Composite Materials
Funding Number(s)
WBS: WBS 732759.07.09
Distribution Limits
Public
Copyright
Public Use Permitted.
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