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Sensitivity Analysis of Mission Critical Shear Bolts of Combat Aircraft High-Speed Flexible Coupling

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Abstract

The combat aircraft utilizes high-speed flexible coupling (HSFC) to transmit the power from the aircraft engine gear box to accessory gearbox and to accommodate misalignment arises in the drive line. The HSFC input drive end has three shear bolts with predetermined shear torque set value. The mission-critical shear bolt failure to act above maximum set value will damage the down-line components by excess torque transmission. The premature action of shear bolts below minimum set value will deprive the power to single-engine aircraft transmission which may even lead to loss of aircraft. To realize consistency performance of shear bolts, sensitivity analysis is carried out considering influencing parameters like shear section size, hardness and preload variation. Based on the analysis, grouping of bolts was enabled for consistent performance in shear torques. The experimental validations are carried out to correlate between theoretical prediction and model behavior.

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Authors and Affiliations

  1. Combat Vehicles Research and Development Establishment, DRDO, Chennai, India

    S. Nagesh & A. M. Junaid Basha

  2. Department of Mechanical Engineering, Defence Institute of Advanced Technology, Pune, India

    Dineshsingh G. Thakur

Authors
  1. S. Nagesh
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  2. A. M. Junaid Basha
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  3. Dineshsingh G. Thakur
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Correspondence to Dineshsingh G. Thakur.

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Nagesh, S., Junaid Basha, A.M. & Thakur, D.G. Sensitivity Analysis of Mission Critical Shear Bolts of Combat Aircraft High-Speed Flexible Coupling. J Fail. Anal. and Preven. 15, 672–678 (2015). https://doi.org/10.1007/s11668-015-9990-z

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  • DOI: https://doi.org/10.1007/s11668-015-9990-z

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