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TECHNICAL PAPERS

Double Cantilever Beam Measurement and Finite Element Analysis of Cryogenic Mode I Interlaminar Fracture Toughness of Glass-Cloth/Epoxy Laminates

[+] Author and Article Information
Y. Shindo, K. Horiguchi, H. Kudo

Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 02, Sendai 980-8579, Japan

R. Wang

Tianjin Institute of Textile Science and Technology, Tianjin, 300160, P. R. China

J. Eng. Mater. Technol 123(2), 191-197 (Nov 16, 2000) (7 pages) doi:10.1115/1.1345527 History: Received May 10, 2000; Revised November 16, 2000
Copyright © 2001 by ASME
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References

Figures

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Double cantilever beam (DCB) specimen
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Schematic of cryogenic test facility used for the DCB test
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Area method for determining critical strain energy release rate
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Boundary conditions assumed for finite element calculations
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(BC)1/3 versus normalized crack length, a/2H, at R.T. and 77 K
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Typical load-displacement curves for L=142 mm specimens at (a) R.T. and (b) 77 K
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Delamination resistance curves for L=142 mm specimens at R.T. and 77 K
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Delamination resistance curves for L=70 mm specimens at (a) R.T., 77 K and (b) 4 K
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SEM photographs (50×) of fracture surfaces adjacent to the precrack tip of DCB specimens tested at (a) R.T., (b) 77 K and (c) 4 K (crack growth from bottom to top)
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SEM photographs (50×) of fracture surfaces of DCB specimen crack growth region at (a) R.T., (b) 77 K and (c) 4 K (crack growth from bottom to top)
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SEM photograph (100×) of fracture surface of DCB specimen crack growth region at 4 K (crack growth from bottom to top)

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