Uniaxial near plane strain tensile tests applied to the determination of the FLC0 formabillity parameter

• Autor(a) principal: Xavier,Marcos Domingos
• Data de Publicação: 2014
• Outros Autores: Plaut,Ronald Lesley, Schön,Cláudio Geraldo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Materials research (São Carlos. Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000400023
• topic: deep drawing; Forming Limit Curve; sheet metal forming; plane strain deformation

An alternative procedure for the determination of the FLC0 value, the limit strain value corresponding to the plane strain mode of the Forming Limit Curves (FLC), a critical parameter in the sheet formability analysis, is suggested and compared with conventional Nakazima simulation tests. The procedure was tested using two different materials: interstitial-free quality steel (IF) and a spheroidized SAE 1050 steel. The intrinsic tensile test, in a near plane strain state, was performed using a small number of samples, with dimensions suggested by the literature. The results were checked against Nakazima test results using the same materials. The plane strain test was reliable in determining consistent FLC0 values and should be preferred since it is not affected by the geometric aspects and by friction, which do affect the Nakazima test. The reliability of the FLC0 values obtained by near plane strain was also corroborated through comparison with literature data.