Open Access Open Access  Restricted Access Subscription or Fee Access

Investigation of Mode I Crack Growth of VARTM Carbon Composites Using Optical Fibers

DANIEL DRAKE, RANI SULLIVAN, KEVIN BROWN, STEPHEN CLAY

Abstract


The objective of this study is to examine the development of Mode I delamination using strain distributions obtained from optical fibers embedded within composite laminates. Optical fibers were interlaced into dry carbon preforms near the midplane of [0/90/90/0] and [0/90/90/0] laminate configurations prior to infusion. Two different cure cycles, a manufacturer-recommended one-step cure cycle and a selected two step cure cycle, were used in the fabrication of the laminates. Double cantilever beam tests were performed to estimate the mode I crack growth. The internal strain was obtained from the embedded optical fibers and crack length was visually measured on the side of the test articles. In addition, a numerical method was developed to determine the crack growth based on the strain distribution associated with the crack front. Good agreement is obtained between the crack lengths obtained from optical fiber and surface measurements.


DOI
10.12783/asc33/26128

Full Text:

PDF

Refbacks

  • There are currently no refbacks.