Reference : Effects of the roll forming process on the mechanical properties of thin-walled sections...

	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering Engineering, computing & technology : Mechanical engineering
	To cite this reference:	http://hdl.handle.net/2268/93603

Title :	Effects of the roll forming process on the mechanical properties of thin-walled sections made of non linear metallic materials
Language :	English
Author, co-author :	Rossi, Barbara [Université de Liège - ULg > Département Argenco : Secteur MS2F > Adéquat. struct. aux exig. de fonct.& perfor. techn.-écon. >]
	Boman, Romain [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire >]
	Degée, Hervé [Université de Liège - ULg > Département ArGEnCo > Département ArGEnCo >]
Publication date :	5-Sep-2011
Main document title :	Proceedings of the 6th International Conference on Thin Walled Structures: ICTWS2011, Timisoara 5-7 September 2011
Pages :	633-640
On invitation :	No
Audience :	International
Event name :	The 6th International Conference on Thin Walled Structures: ICTWS2011
Event date :	from 5-09-2011 to 7-09-2011
Event place (city) :	Timisoara
Event country :	Romania
Keywords :	[en] cold roll forming
Abstract :	[en] It is well known that the cold-forming process is likely to significantly enhance the mechanical properties of the profile by strain hardening leading to increased resistance compared to a resistance assessment based on nominal properties. It is thus necessary to accurately determine the mechanical properties after the cold process of fabrication. The knowledge on these enhanced properties is rather good for profiles made of traditional construction steel (carbon steel with yield strength between 200 and 400 MPa) characterized by an elasticplastic behaviour. However less information is available for profiles made of materials exhibiting a non linear stress-strain relationship. In this context, the paper presents a parametric study on roll-profiled channel sections. For that purpose, the finite element code METAFOR developed at the LTAS division of the University of Liège is used to simulate the forming process of profiles made of high strength steel and of stainless steel. In the simulations, different values of the radius to thickness ratio of the corners are considered. The results of the numerical simulations are expressed in terms of resulting proof strength in the corners versus the radius to thickness ratio for the different materials. They are finally compared to existing predictive formulations. Additional considerations are also given on the forming process itself (i.e. on the configuration of the rolls or on the springback).
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/93603

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