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TECHNICAL PAPERS

Analytical and Experimental Studies of Short-Beam Interlaminar Shear Strength of G-10CR Glass-Cloth/Epoxy Laminates at Cryogenic Temperatures

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

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(1), 112-118 (Jan 05, 2000) (7 pages) doi:10.1115/1.1286235 History: Received June 18, 1999; Revised January 05, 2000
Copyright © 2001 by ASME
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References

Kasen,  M. B., 1981, “Cryogenic Properties of Filamentary-Reinforced Composites: An Update,” Cryogenics, 21, No. 6, pp. 323–340.
Kasen,  M. B., 1990, “Current Status of Interlaminar Shear Testing of Composite Materials at Cryogenic Temperatures,” Adv. Cryog. Eng., 36, pp. 787–792.
Evans,  D., Johnson,  I., Jones,  H., and Hughes,  D. D., 1990, “Shear Testing of Composite Structures at Low Temperatures,” Adv. Cryog. Eng., 36, pp. 819–826.
Becker,  H., 1990, “Problems of Cryogenic Interlaminar Shear Strength Testing,” Adv. Cryog. Eng., 36, pp. 827–834.
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, No. 3, pp. 367–373.
ASTM, 1984, “Standard Test Method for Apparent Interlaminar Shear Strength of Parallel Fiber Composites by Short-Beam Method,” Designation D 2344-84.
Hahn,  H. T., and Pandey,  R., 1994, “A Micromechanics Model for Thermoelastic Properties of Plain Weave Fabric Composites,” ASME J. Eng. Mater. Technol., 116, No. 4, pp. 517–523.
Ueda,  S., and Shindo,  Y., 1991, “Thermal Singular Stresses and Mechanical Properties in Cracked Glass-Fiber Reinforced Plastics at Low Temperatures,” Theoret. Appl. Mech.,40, pp. 249–257.
Hashin, Z., 1972, “Theory of Fiber Reinforced Materials,” NASA-CR-1974, NASA Langley Research Center, Hampton, VA.
Kasen,  M. B., MacDonald,  G. R., Beekman,  D. H., and Schramm,  R. E., 1980, “Mechanical, Electrical, and Thermal Characterization of G-10CR and G-11CR Glass-Cloth/Epoxy Laminates Between Room Temperature and 4 K,” Adv. Cryog. Eng., 26, pp. 235–244.

Figures

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Experimental setup and geometry of short-beam shear specimen
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Boundary conditions assumed for finite element calculations
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Load-deflection curves at room temperature, 77 K and 4 K: (a) l=37.8 mm, h=6.3 mm, b=6.3 mm, s/h=5.0 and (b) l=15.0 mm, h=2.5 mm, b=2.5 mm, s/h=5.0
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Dependence of the apparent interlaminar shear strength on the span-to-thickness ratio
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Dependence of the apparent interlaminar shear strength on the specimen width
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Photomicrographs of actual failure modes (77 K, l=37.8 mm, h=6.3 mm, b=6.3 mm, s/h=5.0): (a) optical microscopy and (b) SEM
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Photomicrographs of actual failure modes (77 K, l=15.0 mm, h=2.5 mm, b=2.5 mm, s/h=5.0): (a) optical microscopy and (b) SEM
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Prediction of load-deflection behavior compared against the measured behavior at 77 K (l=15.0 mm, h=2.5 mm, b=10.0 mm, s/h=5.0)
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Croygenic shear stress distributions through the length with various span-to-thickness ratios (l=37.8 mm, h=6.3 mm, b=6.3 mm): (a) 77 K and (b) 4 K
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Dependence of the flexural strength on the span-to-thickness ratio
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Cryogenic shear stress distributions through the length with various specimen widths (s/h=5.0,l=15.0 mm, h=2.5 mm): (a) 77 K and (b) 4 K
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Cryogenic shear stress distributions through the width various specimen widths (s/h=5.0,l=15.0 mm, h=2.5 mm): (a) 77 K and (b) 4 K
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Dependence of the cryogenic failure shear stress on the specimen width

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