Journal
JOURNAL OF MATERIALS SCIENCE
Volume 41, Issue 10, Pages 2877-2884Publisher
SPRINGER
DOI: 10.1007/s10853-005-5121-7
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Compression in the through-thickness direction (as in fastening) resulted in reversible and irreversible changes in the microstructure of continuous carbon fiber epoxy-matrix composites, as shown by electrical resistance measurement during dynamic compression. The extent of fiber-fiber contact across the interlaminar interface was increased, with partial irreversibility even at a low stress amplitude of 1 MPa. Within a lamina, fiber squeezing in the through-thickness direction and fiber spreading in the transverse direction occurred upon fastening compression, with partial irreversibility at a stress amplitude of 100 MPa or above. For a single laminae beyond 400 MPa, the lessening of fiber squeezing in the through-thickness direction during unloading dominated over the fiber spreading in the transverse direction during loading. (c) 2006 Springer Science + Business Media, Inc.
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