Static And Dynamic Mechanical Performance Of Composite Elliptic Springs For Vehicle Suspension

Mosleh Hamdan, Gehad Goudah Soliman (2007) Static And Dynamic Mechanical Performance Of Composite Elliptic Springs For Vehicle Suspension. Masters thesis, Universiti Putra Malaysia.

[img] PDF
771Kb

Abstract

For composites to compete in vehicle suspension applications, it is essential to control their failure by utilizing their strength in principal direction instead of shear. This can be achieved efficiently by employing a new configuration instead of existing one. The innovated product marries between an elliptical configuration and the woven roving composites. The invented composites semi-elliptical spring replaced both the shock absorber and the coil spring. The assembly includes a composite laminate resin-cured structure comprising at least a pair oriented fabric fiber. It can be used for light and heavy trucks and meet the requirements, together with substantial weight saving. Finite element models were developed to optimize the material and geometry of the composite elliptical spring based on the spring rate, vibration frequency, log life and shear stress. The achieved optimum composite spring has been fabricated and tested. The wet wrapping process was used to fabricate the composite spring. The designed and fabricated composite springs were subjected to compression and cyclic tests to determine their performance. Photographs at any experiment were taken during the test; thus the photograph shows the springs at different stress level. The results showed that the ellipticity ratio significantly influenced the spring rate and the life expectancy of the structure according to the level of loading and number of cycles specified. Composite elliptic spring with ellipticity ratios of 2/=ba displayed to an optimum structure geometry. It is also interesting that no failure was observed and the relaxation of the composite elliptic spring after loading in different displacement modes was evaluated.

Item Type:Thesis (Masters)
Subject:Automobile - springs and suspension
Chairman Supervisor:Elsadig Mahdi Ahmed Saad, PhD
Call Number:FK 2007 24
Faculty or Institute:Faculty of Engineering
ID Code:5201
Deposited By: Nurul Hayatie Hashim
Deposited On:07 Apr 2010 02:01
Last Modified:27 May 2013 07:21

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 07 Apr 2010 02:01.

View statistics for "Static And Dynamic Mechanical Performance Of Composite Elliptic Springs For Vehicle Suspension"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.