Cryogenic interlaminar beam tests in the form of three-point flexure are examined both experimentally and analytically. The use of the short-beam shear test for measuring the interlaminar shear strength of glass-cloth/epoxy laminates at low temperatures is evaluated first. The interlaminar shear tests were carried out with short-beam shear specimens at room temperature, 77 K and 4 K to evaluate the interlaminar shear strength of G-10CR glass-cloth/epoxy laminates. Each specimen was placed on two roller supports that allow lateral motion and a load was applied directly at the center of the specimen. These tests were conducted in accordance with ASTM, 1984, “Standard Test Method for Apparent Interlaminar Shear Strength of Parallel Fiber Composites by Short-Beam Method,” Designation D2344-84. The effects of temperature, specimen width, and span-to-thickness ratio on the apparent interlaminar shear strength are shown graphically. Photomicrographs (scanning electron micrographs, optical micrographs) of actual failure modes were utilized to verify the failure mechanisms. A three-dimensional finite element analysis was also performed to investigate the effects of specimen width and span-to-thickness ratio on the shear stress distribution in the mid-plane. Effective elastic moduli were determined under the assumption of uniform strain inside the representative volume element. The numerical findings are then correlated with the experimental results.
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January 2001
Technical Papers
Analytical and Experimental Studies of Short-Beam Interlaminar Shear Strength of G-10CR Glass-Cloth/Epoxy Laminates at Cryogenic Temperatures
Y. Shindo, Professor,,
Y. Shindo, Professor,
Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 02, Sendai 980-8579, Japan
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R. Wang, Associate Professor,,
R. Wang, Associate Professor,
Tianjin Institute of Textile, Science and Technology, Tianjin, 300160, P. R. China
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K. Horiguchi, Research Associate,
K. Horiguchi, Research Associate,
Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 02, Sendai 980-8579, Japan
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Y. Shindo, Professor,
Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 02, Sendai 980-8579, Japan
R. Wang, Associate Professor,
Tianjin Institute of Textile, Science and Technology, Tianjin, 300160, P. R. China
K. Horiguchi, Research Associate,
Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 02, Sendai 980-8579, Japan
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division June 18, 1999; revised manuscript received January 5, 2000. Associate Technical Editor: S. Mall.
J. Eng. Mater. Technol. Jan 2001, 123(1): 112-118 (7 pages)
Published Online: January 5, 2000
Article history
Received:
June 18, 1999
Revised:
January 5, 2000
Citation
Shindo, Y., Wang, R., and Horiguchi, K. (January 5, 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. January 2001; 123(1): 112–118. https://doi.org/10.1115/1.1286235
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