A geometrically nonlinear formulation for the behavior of composite delaminated beams of arbitrary stacking sequence, and with the effects of transverse shear deformation included, is presented. The formulation is based on a first-order shear deformation kinematic model, which incorporates the bending-stretching coupling effect and also assumes an arbitrary initial imperfection. The nonlinear differential equations are solved by Newton’s method using a finite-difference scheme. The growth of the delamination is also studied by applying the J-integral in order to derive a formula for the energy release rate, which includes transverse shear. Results are presented which illustrate the shear effect, especially with respect to the ratio of the in-plane extensional over shear modulus and with respect to the ratio of plate length over thickness. It is seen that transverse shear can affect largely the displacement profiles, rendering the structure more compliant, and can promote growth by increasing the energy release rate, but this latter effect is moderate and mainly noticable only at the later stages in the postbuckling regime.
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October 1999
Technical Papers
The Effect of Transverse Shear on the Postbuckling and Growth Characteristics of Delaminations in Composites
Catherine H. Ferrie,
Catherine H. Ferrie
School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0150
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Izhak Sheinman,
Izhak Sheinman
School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0150
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George A. Kardomateas
George A. Kardomateas
School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0150
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Catherine H. Ferrie
School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0150
Izhak Sheinman
School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0150
George A. Kardomateas
School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0150
J. Eng. Mater. Technol. Oct 1999, 121(4): 406-412 (7 pages)
Published Online: October 1, 1999
Article history
Received:
January 21, 1999
Revised:
May 16, 1999
Online:
November 27, 2007
Citation
Ferrie, C. H., Sheinman, I., and Kardomateas, G. A. (October 1, 1999). "The Effect of Transverse Shear on the Postbuckling and Growth Characteristics of Delaminations in Composites." ASME. J. Eng. Mater. Technol. October 1999; 121(4): 406–412. https://doi.org/10.1115/1.2812395
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