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Design and development of a test rig to investigate the load-deflection characteristics of helical spring lock washers

Hemant Krishnarao Wagh (CEPD Division, CSIR-National Chemical Laboratory, Pune, India) (Department of Mechanical Engineering, R C Patel Institute of Technology, Shirpur, India)
Girish R. Desale (CEPD Division, CSIR-National Chemical Laboratory, Pune, India)

International Journal of Structural Integrity

ISSN: 1757-9864

Article publication date: 9 April 2018

116

Abstract

Purpose

The helical spring lock washer (HSLW) is a part of nut bolt joint assembly used in different industries like automobile, aerospace, mechanical, chemical, electrical, electronics, etc. It works as a part of temporary joint and plays important role in loosening behavior of assembly under dynamic (vibrations) conditions. Thus, the purpose of this paper is to investigate the performance of HSLW under different controlled operating conditions in order to satisfy its functional requirement.

Design/methodology/approach

In the present investigation, a novel test rig is designed and developed to determine the load-deflection characteristics of HSLWs. The test rig facilitates the controlled linear displacement of the HSLW with predetermined angular rotation of the handle gives the corresponding reaction load on the display. Additionally, the repeatability and reproducibility of the test rig was carried out.

Findings

The newly designed and developed test rig is capable enough to differentiate the load-deflection characteristics during compressive loading and unloading of HSLWs. Additionally, the loss of strain energy can be determined from the load-deflection characteristics of HSLW.

Originality/value

The present test rig is designed and developed to investigate the load-deflection characteristics under compressive loading and unloading of HSLW. The test rig has least count of 0.4905 N for load measurement and 0.01389 mm for linear displacement.

Keywords

Citation

Wagh, H.K. and Desale, G.R. (2018), "Design and development of a test rig to investigate the load-deflection characteristics of helical spring lock washers", International Journal of Structural Integrity, Vol. 9 No. 2, pp. 263-276. https://doi.org/10.1108/IJSI-11-2017-0062

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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