TY - GEN
T1 - Effect of non-linear strain paths on the forming limit diagram of AHSS
AU - Mackensen, A.
AU - Hoffmann, H.
PY - 2009
Y1 - 2009
N2 - The determination of forming limit diagrams is a common method for sheet metal forming processes to provide material formability for the failure prediction. The extent to which the material-specific forming limit curve can be applied is somewhat restricted as its strain dependent failure criterion is based on a linear strain path and therefore has a limited usage for multi-stage forming processes. The overall objective of this work is to identify the effect of non-linear strain paths on the FLD for three different AHSS materials. The materials include a Dual-Phase steel, a TRIP steel and a TWIP steel. Different levels of pre-deformation in biaxial tension, in plain strain and in uniaxial tension are considered. The experimental setup for the forming tool is based on the Nakajima method using a hemispherical punch of 400mm in diameter. An optical 3D deformation measuring system was integrated within the test tool, consisting of two high frequency CCD cameras.
AB - The determination of forming limit diagrams is a common method for sheet metal forming processes to provide material formability for the failure prediction. The extent to which the material-specific forming limit curve can be applied is somewhat restricted as its strain dependent failure criterion is based on a linear strain path and therefore has a limited usage for multi-stage forming processes. The overall objective of this work is to identify the effect of non-linear strain paths on the FLD for three different AHSS materials. The materials include a Dual-Phase steel, a TRIP steel and a TWIP steel. Different levels of pre-deformation in biaxial tension, in plain strain and in uniaxial tension are considered. The experimental setup for the forming tool is based on the Nakajima method using a hemispherical punch of 400mm in diameter. An optical 3D deformation measuring system was integrated within the test tool, consisting of two high frequency CCD cameras.
KW - AHSS
KW - Formability
KW - Forming limit diagram
KW - Nakajima method
KW - Non-linear strain path
KW - Optical deformation measuring system
UR - https://www.scopus.com/pages/publications/77649102462
M3 - Conference contribution
AN - SCOPUS:77649102462
SN - 9781615676361
T3 - Materials Science and Technology Conference and Exhibition 2009, MS and T'09
SP - 2279
EP - 2289
BT - Materials Science and Technology Conference and Exhibition 2009, MS and T'09
T2 - Materials Science and Technology Conference and Exhibition 2009, MS and T'09
Y2 - 25 October 2009 through 29 October 2009
ER -