Effects of buckling initiators on mechanical behavior of thin-walled square tubes subjected to oblique loading

Autor:	Kh. Fallah Nejad, A. Alavi Nia, Hamidreza Farhoudi, H. Badnava
Rok vydání:	2012
Předmět:	Materials science Buckling Energy absorption Mechanical Engineering Collapse (topology) Oblique case Thin walled Tube (fluid conveyance) Building and Construction Composite material Deformation (engineering) Square (algebra) Civil and Structural Engineering
Zdroj:	Thin-Walled Structures. 59:87-96
ISSN:	0263-8231
DOI:	10.1016/j.tws.2012.03.002
Popis:	Thin-walled structures usually collapse in Eulerian buckling mode under oblique loads. Energy absorption capacity and crush force efficiency of the structure in this type of collapse are low. Collapse initiators are used to improve these properties. In this research, effect of collapse initiators on energy absorption characteristics of square tubes under oblique quasi-static loads is investigated both experimentally and numerically. Initiators are in the form of cuttings on the tube corners. Results show that collapse initiators in most of the specimens change deformation mode from general buckling to progressive buckling and decrease considerably the peak load; therefore increase crush force efficiency. Furthermore, effect of location and number of initiators is studied. There is good agreement between the numerical results and data from experiments.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::546ecebb7635d7441983bff572380db8 https://doi.org/10.1016/j.tws.2012.03.002 Zobrazit plný text záznamu Full Text from ScienceDirect