A Closed-Form Buckling Formula for Open-Coiled and Properly Supported Circular-Bar Helical Springs
Journal Title: Strojnicky casopis - Journal of Mechanical Engineering - Year 2018, Vol 68, Issue 3
Abstract
As a continuation of the author’s previous studies on the buckling analysis of helical springs, a closedform formula having been obtained with the help of the artificial neural network (ANN) is proposed and discussed in detail for the first time for a cylindrical close/open-coiled helical spring with fixed ends and having a solid circular section. As far as the author knows there is no such a formula in the open-literature to consider the effects of all stress resultants (torsional and bending moments, axial and shearing forces), large helix pitch angles together with the axial and shear deformations on the buckled state. The present formula may be used in a wide range of the total number of active turns, the ratio of the free axial length to the mean helix diameter, and the spring index. It is yet again revealed that it is not appropriate to use the elementary theory to determine the critical buckling loads for open-coiled springs. The present formula may allow the deeper understanding of spring buckling mechanism and to be used directly and safely in the design processes of such closely/open-coiled springs.
Authors and Affiliations
Yildirim Vebil
Keywords
Related Articles
- EP ID EP43947
- DOI https://doi.org/10.2478/scjme-2018-0025
- Views 156
- Downloads 0
Static Balancing of Robot Mechanisms and Manipulation Devices
The paper deals with static balancing of various kinds of mechanisms and manipulation devices using spring balancing mechanisms. In case of parallelogram robots and manipulation mechanisms a spring balancing mechanism...
EN AW-2024 Wrought Aluminum Alloy Processed by Casting with Crystallization under Pressure
By using the wrought aluminum alloys can be created castings with higher mechanical properties than the castings made of standard foundry aluminum alloys, but it is necessary to handle the process of making sound casti...
A Paradigm for the Analysis of Preloaded Bolted Joints
The purpose of this paper is to present a paradigm, or guide, to the analysis of preloaded bolted joints made using multiple bolts. Classical analysis methods are applied to the interaction of the joint elements subjec...
Nonlinear Model of the Passenger Car Seat Suspension System
The paper deals with the modelling of a passenger car seat suspension system. Currently, vehicle safety and ride comfort are one of the most important factors of vehicle design. This article analyses a mathematical mod...
Effective Thermo-Structural Analysis for Disc Brake System Simulation
The evaluation of disk brake squeal is nowadays performed using Finite Element Model. In this standard procedure the thermal effects are omitted. The omission is done because of long computing time of fully coupled bra...