Effects of Forming Conditions on Wrinkling in Necking of Tube End

Autor:	Yoichi Takahashi, Hiroaki Mizumoto, Shigefumi Kihara, Yuya Nakata, Takuo Nagamachi
Rok vydání:	2011
Předmět:	Materials science Mechanical Engineering High dimensional Condensed Matter Physics Curvature Finite element method Compressive strength Mechanics of Materials medicine General Materials Science Tube (fluid conveyance) Composite material medicine.symptom Wrinkle Automotive exhaust Necking
Zdroj:	MATERIALS TRANSACTIONS. 52:31-36
ISSN:	1347-5320 1345-9678
Popis:	The effects of forming conditions on wrinkling in the neck of stainless-steel tubes were investigated using experiments and three-dimensional finite element simulations. The materials used for this study were tubes designed for automotive exhaust parts. When the axial or radial forming pitch of the rollers is large, the outside of the tube is subjected to considerable compressive stress in the circumferential direction by contact with the rollers. Simultaneously, the inside of the tube is subjected to considerable tensile stress in the circumferential direction. Consequently, the tube is subjected to excessive localized forming, which causes the curvature to become uneven in the circumferential direction, thereby resulting in wrinkling. The number of contact points with the rollers was determined. Results show that the optimum forming conditions were easily determined to achieve short forming times and high dimensional accuracy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c9485d81bda268012b2184286dcb4e22 https://doi.org/10.2320/matertrans.p-m2010822 Zobrazit plný text záznamu