NDLI: Simplified models for the study of postbuckled hat-stiffened composite panels

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Simplified models for the study of postbuckled hat-stiffened composite panels

Content Provider	NASA Technical Reports Server (NTRS)
Author	Vescovini, Riccardo Davila, Carlos G. Bisagni, Chiara
Copyright Year	2012
Description	The postbuckling response and failure of multistringer stiffened panels is analyzed using models with three levels of approximation. The first model uses a relatively coarse mesh to capture the global postbuckling response of a five-stringer panel. The second model can predict the nonlinear response as well as the debonding and crippling failure mechanisms in a single stringer compression specimen (SSCS). The third model consists of a simplified version of the SSCS that is designed to minimize the computational effort. The simplified model is well-suited to perform sensitivity analyses for studying the phenomena that lead to structural collapse. In particular, the simplified model is used to obtain a deeper understanding of the role played by geometric and material modeling parameters such as mesh size, inter-laminar strength, fracture toughness, and fracture mode mixity. Finally, a global/local damage analysis method is proposed in which a detailed local model is used to scan the global model to identify the locations that are most critical for damage tolerance.
File Size	1409467
Page Count	30
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120002670
Archival Resource Key	ark:/13960/t9c58m15r
Language	English
Publisher Date	2012-02-01
Access Restriction	Open
Subject Keyword	Composite Materials Panels Damage Assessment Sensitivity Analysis Debonding Materials Tolerances Mechanics Fracture Strength Composite Structures Buckling Fracturing Failure Stringers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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