Study of interface influence on bending performance of CFRP with embedded optical fibers

Rong-mei Liu; Da-kai Liang

doi:10.1117/12.839362

25 August 2009 Study of interface influence on bending performance of CFRP with embedded optical fibers

Rong-mei Liu, Da-kai Liang

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73755Z (2009) https://doi.org/10.1117/12.839362
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

Studies showed that the bending strength of composite would be affected by embedded optical fibers. Interface strength between the embedded optical fiber and the matrix was studied in this paper. Based on the single fiber pull out tests, the interfacial shear strength between the coating and the clad is the weakest. The shear strength of the optical fiber used in this study is near to 0.8MPa. In order to study the interfacial effect on bending property of generic smart structure, a quasi-isotropic composite laminates were produced from Toray T300C/ epoxy prepreg. Optical fibers were embedded within different orientation plies of the plates, with the optical fibers embedded in the same direction. Accordingly, five different types of plates were produced. Impact tests were carried out on the 5 different plate types. It is shown that when the fiber was embedded at the upper layer, the bending strength drops mostly. The bending normal stress on material arrives at the maximum. So does the normal stress applied on the optical fiber at the surface. Therefore, destructions could originate at the interface between the coating and the clad foremost. The ultimate strength of the smart structure will be affected furthest.

Citation Download Citation

Rong-mei Liu and Da-kai Liang "Study of interface influence on bending performance of CFRP with embedded optical fibers", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73755Z (25 August 2009); https://doi.org/10.1117/12.839362

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KEYWORDS

Optical fibers

Interfaces

Coating

Composites

Smart structures

Structured optical fibers

Aerospace engineering

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