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Advanced calculation of the room-temperature shapes of unsymmetric laminates
Citation Link: https://doi.org/10.15480/882.1598
Publikationstyp
Journal Article
Date Issued
1999-08-01
Sprache
English
Author(s)
TORE-DOI
Journal
Volume
33
Issue
16
Start Page
1472
End Page
1490
Citation
Journal of Composite Materials 16 (33): 1472-1490 (1999)
Publisher DOI
Publisher
Sage Publications
It is well known that the room-temperature shapes of unsymmetric laminates do not always conform to the predictions of classical lamination theory. Instead of being saddle shaped, as classical lamination theory predicts, the room-temperature shapes of unsymmetrically laminated composites are often cylindrical in nature. In addition, a second cylindrical shape can sometimes be obtained from the first by a simple snap-through action. Since 1981 several models, which are restricted to rectangular plates and sometimes only some special lay-ups, have been developed. The Finite Element Analysis (FEA) has just recently been used for the calculation of the room-temperature shapes of unsymmetric laminates, because more sophisticated finite element codes are now available and the calculations can be made in an acceptable time. Using the FEA there are no restrictions concerning the laminate geometry or the lay-up and the snap-through effect can be modeled. Additionally the edge-effects can also be monitored in the FEA results. Unsymmetric laminates can become important for aircraft applications especially for the aeroelastic tailoring.
Subjects
unsymmetric laminates
finite element analysis
FEA
room temperature shapes
DDC Class
620: Ingenieurwissenschaften
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