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Characterization of the interlaminar shear fatigue properties of SMC R‐50
Author(s) -
Wilson Dale W.,
Byron Pipes R.
Publication year - 1981
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760210805
Subject(s) - materials science , composite material , scanning electron microscope , shear modulus , microstructure , shear (geology) , modulus , characterization (materials science) , optical microscope , nanotechnology
Abstract The interlaminar shear fatigue behavior of the sheet molding compound SMC‐R50 has been studied. A thick‐laminate, short beam shear test was employed to characterize S ‐ N behavior for the material at 21 and 90°C. The shear modulus ( G xy ) was determined at 21 and 90°C and the effect of fatigue on modulus at both test temperatures is discussed. Scanning electron microscope (SEM) and optical photomicrographs of pristine and post test specimens were studied to assess the relationship between material microstructure and the observed fatigue results for strength and modulus. The experimental evidence suggests that the fatigue life for this material is determined by a single flaw growth mechanism, rather than a global “wear out” process.