Prediction of mode II delamination propagation life under a standard spectrum loading in a carbon fiber composite

Anilchandra, AR and Bojja, R and Jagannathan, N and Manjunatha, CM (2016) Prediction of mode II delamination propagation life under a standard spectrum loading in a carbon fiber composite. Journal of Composite Materials, 51 (20). pp. 2827-2833. ISSN 0021-9983

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Abstract

Mode II constant amplitude fatigue delamination propagation tests were conducted at three different stress ratios, viz. R ¼ 0.0, 0.5, and �1.0 using modified three-point bend test fixture and end notched flexure (ENF) test specimens of unidirectional IMA/M21 carbon fiber composite. Delamination length was measured by compliance technique. The delamination propagation rate (da/dN) plots were constructed for various stress ratios. Using an equivalent energy release rate concept, Geq, all the curves were merged into a single curve in the form of Paris equation, da/dN ¼ C(Geq) k.The Paris constants, C and k, determined from the experimental results were subsequently used in predicting the delamination propagation life under a standard mini FALSTAFF spectrum load sequence. Experiments were also con�ducted under the same spectrum load sequence with various reference loads to determine the propagation lives. A reasonably good correlation was observed between the predicted and experimental mode II delamination propagation life under spectrum loads.

Item Type:	Article
Uncontrolled Keywords:	Fatigue, composite, spectrum load, FALSTAFF, delamination
Subjects:	CHEMISTRY AND MATERIALS > Composite Materials CHEMISTRY AND MATERIALS > Nonmetallic Materials ENGINEERING > Electronics and Electrical Engineering
Depositing User:	Mrs SK Pratibha
Date Deposited:	25 Aug 2022 11:43
Last Modified:	25 Aug 2022 11:43
URI:	http://nal-ir.nal.res.in/id/eprint/13636

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