SYMPOSIA PAPER Published: 01 January 1984
STP30198S

Influence of Prescribed Delaminations on Stiffness-Controlled Behavior of Composite Laminates

Source

The effect of delaminations on the stiffness-controlled behavior of laminated composites is investigated. Four panels of [±45,0,90]2s quasi-isotropic layup are fabricated from the T300/Narmco 5208 material system, three with prescribed delaminations of different rectangular shapes and orientations. Nondestructive buckling tests and vibration experiments are conducted on these panels with clamped-free and clamped-simple support boundary conditions to assess the stiffness-controlled behavior. Free-free vibration tests are also conducted to study the influence of delamiantions on higher modes. Finite-element analyses are performed to compare with the experimental results. The findings indicate that delaminations of the size considered can be tolerated for some service conditions without dire consequences.

Author Information

Reddy, AD
School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, Ga.
Rehfield, LW
School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, Ga.
Haag, RS
School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, Ga.
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Details
Developed by Committee: E08
Pages: 71–83
DOI: 10.1520/STP30198S
ISBN-EB: 978-0-8031-4902-1
ISBN-13: 978-0-8031-0218-7