Theoretical and experimental evaluation of double-notch shear strength of G-10CR glass-cloth/epoxy laminates at cryogenic temperatures

Journal Article · Thu Jul 01 04:00:00 EDT 1999 · Journal of Engineering Materials and Technology

DOI:https://doi.org/10.1115/1.2812388· OSTI ID:679213

Shindo, Y; Wang, R; Horiguchi, K; Ueda, S ^[1]

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1. Tohoku Univ., Sendai (Japan)

the cryogenic interlaminar shear behavior of G-10CR glass-cloth/epoxy laminates has been discussed through theoretical and experimental characterizations. The use of the double-notch 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 double-notch shear specimens at room temperature, 77 K and 4 K to evaluate the interlaminar shear strength (ILSS) of G-10CR glass-cloth/epoxy laminates. The double-notch shear specimen was loaded on its ends in compression with a supporting jig to prevent buckling. These tests were conducted in accordance with ASTM D3846-79. The effects of temperature, specimen thickness, and notch separation on the apparent ILSS are shown graphically. Fracture surfaces were examined by scanning electron microscopy (SEM) and optical microscopy to verify the failure mechanisms. A three-dimensional finite element analysis was also performed to investigate the effect of specimen thickness and notch separation on the shear stress distribution in the expected fracture 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. The validity of this test technique has been established.

• Sponsoring Organization: USDOE
• OSTI ID: 679213
• Journal Information: Journal of Engineering Materials and Technology, Journal Name: Journal of Engineering Materials and Technology Journal Issue: 3 Vol. 121; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
EPOXIDES
FIBERS
FINITE ELEMENT METHOD
GLASS
MATHEMATICAL MODELS
NOTCHES
SHEAR PROPERTIES
VALIDATION