Carbon epoxy composite T300/914 which has wide applications in aerospace industries, as a structural material, has been analyzed, to determine the interlaminar fracture toughness. Laminates with a thickness of 4.6 mm, consisting of 48 layers of T300/914, are considered for estimating the inter-laminar fracture toughness. These specimens have been fabricated by hand layup method followed by controlled curing in an autoclave. Tests have been conducted in accordance with ASTM standards, for Mode I by Double Cantilever Beam (DCB) test and End Notch Flexure (ENF) test for Mode II. Pulse-Echo test results and C-Scan images of the specimens were also analyzed to locate the exact position of delamination. During the preliminary tests, it was found that the interlaminar fracture toughness varied, because of bonding of release film with the sides of the laminate. By Modified Beam Theory, Mode I and Mode II fracture toughness values of the prepared specimens were found to be 0.090 kJ/m2and 0.542 kJ/m2, respectively. It was also noted that the fracture toughness of the specimens from the same laminate varied with the degree of compaction.
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11 January 2019
ADVANCES IN POLYMER COMPOSITES: MECHANICS, CHARACTERIZATION AND APPLICATIONS: Proceedings of the Second International Conference on Polymer Composites (ICPC 2018)
15–16 December 2018
Surathkal, India
Research Article|
January 11 2019
Experimental study of Mode I and Mode II interlaminar fracture toughness on aerospace structural composite T300/914
S. Sachin;
S. Sachin
a)
1
Dept of Mechanical Engineering, NITK
, Surathkal, Karnataka, India
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H. Shivananda Nayaka;
H. Shivananda Nayaka
b)
1
Dept of Mechanical Engineering, NITK
, Surathkal, Karnataka, India
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B. Santhosh;
B. Santhosh
2
Vikram Sarabhai Space Center
, Thiruvananthapuram, India
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Prasad Krishna
Prasad Krishna
1
Dept of Mechanical Engineering, NITK
, Surathkal, Karnataka, India
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AIP Conf. Proc. 2057, 020007 (2019)
Citation
S. Sachin, H. Shivananda Nayaka, B. Santhosh, Prasad Krishna; Experimental study of Mode I and Mode II interlaminar fracture toughness on aerospace structural composite T300/914. AIP Conf. Proc. 11 January 2019; 2057 (1): 020007. https://doi.org/10.1063/1.5085578
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