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Title of Journal: Iran J Sci Technol Trans Mech Eng

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Abbravation: Iranian Journal of Science and Technology, Transactions of Mechanical Engineering

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Springer International Publishing

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DOI

10.1002/cite.200500078

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2364-1835

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FoamFilled Grooved Tubes with Circular CrossSect

Authors: Abbas Niknejad Mohammad Mahdi Abedi Gholam Hossein Liaghat Mohammad Zamani Nejad
Publish Date: 2016/07/15
Volume: 40, Issue: 3, Pages: 155-167
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Abstract

In this article some theoretical relations are derived to predict the instantaneous folding force and the absorbed energy by the empty and polyurethane foamfilled grooved tubes with circular crosssection during the first fold formation under the axial loading Five different modes of deformation are considered in the theoretical model of deformation bending around two internal circular hinge lines bending around an external circular hinge line extensional deformation in the folding arms axial compression of the polyurethane foam and interaction effects between polyurethane foam and inner wall of the grooved tube Also based on the experiments a semiempirical relation is suggested to predict the effective axial displacement at the end of a complete fold creation in the polyurethane foamfilled grooved tubes To verify the theoretical analyses some axial compression tests were carried out on the empty and filled grooved tubes Comparison of the theoretical predictions with the corresponding experimental results showed a good correlation


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