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Development of Benchmark Examples for Quasi-Static Delamination Propagation and Fatigue Growth PredictionsThe development of benchmark examples for quasi-static delamination propagation and cyclic delamination onset and growth prediction is presented and demonstrated for Abaqus/Standard. The example is based on a finite element model of a Double-Cantilever Beam specimen. The example is independent of the analysis software used and allows the assessment of the automated delamination propagation, onset and growth prediction capabilities in commercial finite element codes based on the virtual crack closure technique (VCCT). First, a quasi-static benchmark example was created for the specimen. Second, based on the static results, benchmark examples for cyclic delamination growth were created. Third, the load-displacement relationship from a propagation analysis and the benchmark results were compared, and good agreement could be achieved by selecting the appropriate input parameters. Fourth, starting from an initially straight front, the delamination was allowed to grow under cyclic loading. The number of cycles to delamination onset and the number of cycles during delamination growth for each growth increment were obtained from the automated analysis and compared to the benchmark examples. Again, good agreement between the results obtained from the growth analysis and the benchmark results could be achieved by selecting the appropriate input parameters. The benchmarking procedure proved valuable by highlighting the issues associated with choosing the input parameters of the particular implementation. Selecting the appropriate input parameters, however, was not straightforward and often required an iterative procedure. Overall the results are encouraging, but further assessment for mixed-mode delamination is required.
Document ID
20120009193
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Krueger, Ronald
(National Inst. of Aerospace Hampton, VA, United States)
Date Acquired
August 25, 2013
Publication Date
May 15, 2012
Subject Category
Composite Materials
Report/Patent Number
NF1676L-13795
Meeting Information
Meeting: 2012 SIMULIA Customer Conference
Location: Providence, RI
Country: United States
Start Date: May 15, 2012
End Date: May 17, 2012
Funding Number(s)
WBS: WBS 877868.02.07.07.05.01.01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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