International Journal of Vehicle Structures and Systems

Jefferson Andrew ¹, Vellayaraj Arumugam ¹, Adhithya Plato Sidharth ¹, Benny Thomas ¹

Affiliations
1 Department of Aerospace Engg., Madras Institute of Technology, Anna University, Chennai, IN

Abstract

In this paper, symmetric cross ply CFRP laminates were fabricated using hand layup with LY556 epoxy resin as matrix and the specimens were cut without cut-out, with circular, vertical elliptical and horizontal elliptical cut-outs according to the ASTM D 7137 standard using water jet cutting. The CFRP specimens with and without cut-outs were subjected to compression under controlled condition accompanied by acoustic emission (AE) monitoring. The ultimate compressive strength for specimens with and without cut-outs were determined and compared. The optimum cut-out with lesser reduction in compressive strength was determined. The nature and dominance of different failure modes in each type of cut-out were investigated using AE. Finally the result gives useful information about improved design of laminated composites with cut-outs suitable for different applications.

Keywords

CFRP, Cut-outs, Acoustic Emission, Peak Frequency Analysis, Compression Test.

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