Analytical and Numerical Analyses of Delamination Buckling in Layer Beams

Abstract:

In the present paper, new nondimensionalized parameters, namely, nondimensionalized axial and bending stiffnesses have been introduced to study analytically the buckling behavior of two-layer beams with separated delaminations. Numerical analysis has been carried out by using ANSYS software to validate the developed analytical model. Delaminations are modeled with gap elements in ANSYS. A detailed parametric study has been carried out and it is found that the buckling behavior strongly depends on these new nondimensionalized parameters. Another nondimensionalized parameter, effective-slenderness ratio is also introduced and it is found to be a controlling parameter of delamination buckling mode configurations.

• Periodical: Solid State Phenomena (Volume 111)
• Pages: 75-78
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.111.75
• Online since: April 2006
• Authors: Madusudhanan R. Parlapalli, Dong Wei Shu, G.B. Chai
• Keywords: Buckling, Delamination, Layer, Stiffness

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15 0. 35 0. 55 0. 75 b/L P/Pcr.

[1] a=0. 1L.

[2] a=0. 3L.

[3] a=0. 4L.

[4] a=0. 5L.

[5] a=0. 6L 1 2 3 4 5 0.

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4.

6.

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25 0. 45 0. 65 NAS 2 P/Pcr.

[1] NBS2=0. 25.

[2] NBS2=0. 30.

[3] NBS2=0. 35.

[4] NBS2=0. 40 4 3 2 1 0.

2.

4.

6.

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[10] 2 0. 4 0. 6 0. 8 ESR 2 P/Pcr.

[1] NAS2=0. 80 NBS2=0. 49.

[2] NAS2=0. 40 NBS2=0. 26.

[3] NAS2=0. 60 NBS2=0. 37 I II III 2 1 3.