Interlaminar Fracture Toughness of A Graphite/Epoxy Multidirectional Composite  

Oleh:

Yang, Z. ; Sun, C. T.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Engineering Materials and Technology vol. 122 no. 4 (2000), page 428-433.
Topik: composite; interlaminar; fracture; graphite; epoxy; multidirectional; composite

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ87.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

In this paper, an experimental investigation on interlaminar fracture behaviour and fracture toughness of a graphite / epoxy multidirectional composite laminate is presented using end - notched flexure specimens. The 0 / O interfaces are considered. The interlaminar fracture toughness is obtained and compared using three data reduction methods, i. e., the area method, classical laminated plate theory, and finite element analysis. Results show that the toughness value depends on the data reduction method used. Two different crack - length - to - span ratios are chosen to study how the stable or unstable crack extension influences the toughness measurement. It is observed that the toughness obtained from the tests of stable crack extension is appreciably higher than that from the tests of unstable crack extension. It is also seen that friction resulting from contact of crack surfaces greatly affects the measured toughness in the case of stable crack extension. In addition, effects of the specimen geometry and fiber orientation on the interlaminar fracture toughness are also evaluated.

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