NDLI: Finite element analysis of instability-related delamination growth

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Finite element analysis of instability-related delamination growth

Content Provider	NASA Technical Reports Server (NTRS)
Author	Whitcomb, J. D.
Copyright Year	1981
Description	A parametric study of postbuckled through-width delaminations in laminated coupons was performed. A finite element analysis was developed to analyze the coupons as a combination of linear and geometrically nonlinear components. Because most of the coupon configuration studied behaves linearly, the mixed linear and nonlinear analysis greatly reduced computational costs. The analysis was verified by comparing numerical with exact solutions for simple hypothetical problems. In addition, measured lateral deflections of postbuckled through-width delaminations in laminated coupons were compared with predicted deflections. In the parametric study, stress distributions and strain-energy release rates were calculated for various delamination lengths, delamination depths, applied loads, and lateral deflections. Also, a small number of coupons with through-width delaminations were fatigue tested to obtain delamination growth data. Calculated strain-energy release rates were compared with the observed growth rates to determine the relative importance of the Mode 1 and Mode 2 components of energy release. Growth process was dominated by G sub I.
File Size	892347
Page Count	45
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19810012603
Archival Resource Key	ark:/13960/t2896181p
Language	English
Publisher Date	1981-03-01
Access Restriction	Open
Subject Keyword	Composite Materials Finite Element Method Stress Analysis Stress Distribution Strain Energy Release Rate Fatigue Materials Computer Graphics Delaminating Mathematical Models Laminates Buckling 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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