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Open hole fatigue testing of laser machined MD-CFRPs

Kalyanasundaram, Dinesh and Gururaja, Suhasini and Prabhune, Prajakta and Singh, Dilpreet (2018) Open hole fatigue testing of laser machined MD-CFRPs. In: COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 111 . pp. 33-41.

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Official URL: https://dx.doi.org/10.1016/j.compositesa.2018.05.0...

Abstract

The effect of fiber laser machining (FLM) on multi-directional carbon fiber reinforced plastics (MD-CFRP) with 0/90/45/ - 45]s lay-up was studied under tension-tension fatigue with stress ratio R = 0.1 for an open hole fatigue (OHF) test configuration. The FLM parameters were chosen to yield a heat affected zone (HAZ) corresponding to a damage factor of approximately 1.4. The growth of this initial damage under tension-tension fatigue was investigated using digital image correlation (DIC), and damage growth characterization was carried out using scanning acoustic microscopy (SAM) and micro computed tomography (micro-CT). The endurance limit of the MD-CFRPs was evaluated by examining the fatigue life at 70, 50 and 30% of its ultimate tensile strength. Results show a strong correlation of damage mode on the applied load levels like conventionally machined samples.

Item Type: Journal Article
Additional Information: Copyright of this article belong to ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Depositing User: Id for Latest eprints
Date Deposited: 16 Jul 2018 14:57
Last Modified: 16 Jul 2018 14:57
URI: http://eprints.iisc.ac.in/id/eprint/60167

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