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- W2147732775 abstract "The experimental determination of the resistance to delamination is very important in aerospace applications as composite materials have superior properties only in the fiber direction. To measure the interlaminar fracture toughness of composite materials, different kinds of specimens and experimental methods are available. This article examines the fracture energy of four-point end-notched flexure (4ENF) composite specimens made of carbon/epoxy and glass/epoxy. Experiments were conducted on these laminates and the mode II fracture energy, <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mrow><mml:msub><mml:mrow><mml:mi>G</mml:mi></mml:mrow><mml:mrow><mml:mtext>II</mml:mtext><mml:mi>C</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>, was evaluated using compliance method and was compared with beam theory solution. The crack growth resistance curve (R-curve) for these specimens was generated and the found glass/epoxy shows higher toughness values than carbon/epoxy composite. From this study, it was observed that R-curve effect in 4ENF specimens is quite mild, which means that the measured delamination toughness, <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mrow><mml:msub><mml:mrow><mml:mi>G</mml:mi></mml:mrow><mml:mrow><mml:mtext>II</mml:mtext><mml:mi>C</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>, is more accurate." @default.
- W2147732775 created "2016-06-24" @default.
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- W2147732775 date "2014-11-12" @default.
- W2147732775 modified "2023-09-25" @default.
- W2147732775 title "Generation of R-Curve from 4ENF Specimens: An Experimental Study" @default.
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- W2147732775 doi "https://doi.org/10.1155/2014/956268" @default.
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