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Bending strength of delaminated aerospace composites by Moustafa Kinawy, Richard Butler, and Giles W. Hunt Philosophical Transactions A Volume 370(1965):1780-1797.

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Presentation on theme: "Bending strength of delaminated aerospace composites by Moustafa Kinawy, Richard Butler, and Giles W. Hunt Philosophical Transactions A Volume 370(1965):1780-1797."— Presentation transcript:

1 Bending strength of delaminated aerospace composites by Moustafa Kinawy, Richard Butler, and Giles W. Hunt Philosophical Transactions A Volume 370(1965):1780-1797 April 28, 2012 ©2012 by The Royal Society

2 Delaminated beam coordinates and variables. Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society

3 Force and moment components at the delamination edge. Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society

4 Four-point bending test fixture showing specimen with delamination open (loaded above snap- buckling moment). Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society

5 Applied moment versus displacement for T800/M21 specimen. Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society

6 Electron scanning microscopy (ESM) images of fracture surfaces for T800/M21 material. Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society

7 Delamination extension versus number of cycles for T800/M21 specimens at a range of severities. Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society

8 Delamination extension versus number of cycles for IM7/8552 specimens at a range of severities. Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society

9 Equilibrium solutions showing analytical displacement Q1 against applied moment per unit width M for a range of imperfections Q0 (T800/M21 specimen). Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society

10 Out-of-plane displacement Q1 comparison for (a) T800/M21 specimen and (b) IM7/8552 specimen. Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society

11 Strain energy release rate using the thin-film and mixed-mode analyses for the delaminated, post-buckled beam: T800/M21 specimens. Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society

12 Strain energy release rate using the thin-film and mixed-mode analyses for the delaminated, post-buckled beam: IM7/8552 specimens. Moustafa Kinawy et al. Phil. Trans. R. Soc. A 2012;370:1780- 1797 ©2012 by The Royal Society


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