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RESEARCH PAPERS: Design Technology

Design Nomographs of Compression Helical Springs for Predetermined Reliability Levels

[+] Author and Article Information
My Dao Thien

Mechanical Engineering Department, Ecole de Technologie Supérieure, University of Quebec, Montreal, Canada

M. Massoud

Mechanical Engineering Department, University of Sherbrooke, Sherbrooke, Quebec, Canada

J. Mech. Des 103(2), 268-273 (Apr 01, 1981) (6 pages) doi:10.1115/1.3254902 History: Received February 01, 1980; Online November 17, 2009

Abstract

This paper discusses a probabilistic approach for the design of Compression Closely Coiled Helical Springs subjected to periodic axial loading. The classical design procedure results in deterministic geometric parameters with tolerances normally chosen according to standards without due regard to their effects on the mission success as normally expressed by a reliability level. With the proposed design procedure, the engineer can specify nominal mean values for the geometric parameters and their tolerances according to a predetermined reliability level. Design nomographs are presented to help the engineer, in the early stages of design, to choose between many alternatives. Computer algorithms can easily be written to verify the final or optimum design.

Copyright © 1981 by ASME
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