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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

ASTM D 3846-94, 1996, “Standard Test Method for In-Plane Shear Strength of Reinforced Plastics,” Annual Book of ASTM Standards, 08.02, pp. 476–478.
ASTM D 2344-84, 1996, “Standard Test Method for Apparent Shear Strength of Parallel Fiber Composites by Short-Beam Method,” Annual Book of ASTM Standards, 15.03, pp. 43–45.
Ogata,  T., Evans,  D., and Nyilas,  A., 1998, “VAMAS Round Robin Tests on Composite Materials and Solder at Liquid Helium Temperature,” Adv. Cryog. Eng., 44, pp. 269–276.
Shindo,  Y., Wang,  R., Horiguchi,  K., and Ueda,  S., 1999, “Theoretical and Experimental Evaluation of Double-Notch Shear Strength of G-10CR Glass-Cloth/Epoxy Laminates at Cryogenic Temperatures,” ASME J. Eng. Mater. Technol., 121, pp. 367–373.
Shindo, Y., Wang, R., and Horiguchi, K., 2000, “Analytical and Experimental Studies of Short-Beam Interlaminar Shear Strength of G-10CR Glass-Cloth/Epoxy Laminates at Cryogenic Temperatures,” ASME J. Eng. Mater. Technol., in press.
O’Brien,  T. K., 1998, “Interlaminar Fracture Toughness: The Long and Winding Road to Standarization,” Composites, Part B, 29B, pp. 57–62.
ASTM D 5528-94a, 1996, “Standard Test Method for Mode I Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Material Composites,” Annual Book of ASTM Standards, 15.03, pp. 280–289.
JIS K 7086, 1993, “Testing Method for Interlaminar Fracture Toughness of Carbon Fiber Reinforced Plastics,” Japanese Standards Association.
Humer,  K., Tschegg,  E. K., Platschka,  R., and Weber,  H. W., 1996, “Acoustic Emission Studies on Irradiated Plastic-Copper Interfaces in Mode I at Room Temperature and at 77 K,” Adv. Cryog. Eng., 42, pp. 51–56.
Hashemi,  S., Kinloch,  A. J., and Williams,  J. G., 1990, “Mechanics and Mechanisms of Delamination in a Poly(ether sulphone)-Fibre Composite,” Compos. Sci. Technol., 37, pp. 429–462.
Hahn,  H. T., and Pandey,  R., 1994, “A Micromechanics Model for Thermoelastic Properties of Plane Weave Fabric Composites,” ASME J. Eng. Mater. Technol., 116, pp. 517–523.
Hashin, Z., 1972, “Theory of Fiber Reinforced Materials,” NASA-CR-1974, NASA Langley Research Center, Hampton, VA.
ANSYS Revision 5.3, 1996, ANSYS, Inc., Houston, PA.
Buchholz,  F.-G., Rikards,  R., and Wang,  H., 1997, “Computational Analysis of Interlaminar Fracture of Laminated Composites,” Int. J. Fract., 86, pp. 37–57.
Hartwig,  G., and Knaak,  S., 1984, “Fibre-Epoxy Composites at Low Temperatures,” Cryogenics, 24, pp. 639–647.
Nashijima,  S., Okada,  T., and Honda,  Y., 1994, “Evaluation of Epoxy Resin by Positron Annihilation for Cryogenic Use,” Adv. Cyrog. Eng., 40, pp. 1137–1144.

Figures

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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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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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