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Journal Article

Citation

Romero JA, Rakheja S, Ahmed AKW, Lozano A. Heavy Vehicle Syst. 2002; 9(2): 93-114.

Affiliation

Concave Research Centre, Department of Mechanical Engineering, Concordia University, Montreal, Que. H3G 1M8, Canada

Copyright

(Copyright © 2002, Inderscience Publishers)

DOI

unavailable

PMID

unavailable

Abstract

A simple model is proposed to study the load-securement properties of indirect tiedowns under a longitudinal deceleration. The elasticity of the tiedown is expressed by an equivalent stiffness as a function of the material properties, tiedown angle, initial tension and cargo geometry. The equivalent stiffness is observed to be a strongly nonlinear function of cargo displacement and tiedown angle. The model further incorporates the effects of load-deck interface friction and vertical trailer vibration. The dynamic response characteristics of the restrained cargo are evaluated in terms of peak cargo motion and peak tiedown force under a longitudinal deceleration. The model is utilized to study the effects of tiedown materials, tiedown angle, cargo-deck friction and nature of vertical vibration (frequency, amplitude and phase). The results of the analysis revealed the strong influence of cargo-deck friction, vibration amplitude, tiedown material and tiedown angle on the potential cargo movement. The initial tension is also found to influence the effectiveness of the restraints.

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