... coefficients. It is found that friction distribution at the die-sheet interface strongly affects the metal flow during the forming process, which has a direct impact on deformation stability and strain localization. With the proposed optimal variable friction distribution, the quality of the formed parts has...

... of the difference in thickness, properties, and/or surface characteristics ( 7 8 ). During sheet metal forming processes, different automotive parts undergo different forming modes (often referred to as strain path) depending on interaction of different tooling design and process design variables. For example...

... with a protrusion height of 49 mm is obtained. 02 09 2008 29 04 2010 24 06 2010 24 06 2010 finite element analysis forming processes magnesium alloys plastic deformation magnesium alloy AZ61 T-shape hydroforming loading path finite element analysis warm forming...

... for the two materials. As shown in the figure, the part made from Material D is formed successfully whereas that made from Material E has very long shear fractures along the bended corner regions. Note here that the forming processes with the Material D were not always successful and, instead, some small...

...S. Diot; D. Guines; A. Gavrus; E. Ragneau In order to characterize the metal behavior at strain, strain rate, and temperature range encountered in metal forming processes, the rheological compressive test is well adapted and has been often used. Nevertheless, this experimental test is more...

... path is proposed. The results also suggest that kinematic hardening and transient hardening effects may explain the path dependence observed in some of the prestrain paths. 10 08 2007 22 02 2008 17 09 2008 alloy steel aluminium forming processes hardening stress-strain...

... AISI304 austenitic stainless steels and TRIP800 multiphase industrial steels. e-mail: mcherkaoui@me.gatech.edu 16 03 2007 20 08 2007 10 06 2008 drawing (mechanical) ductility finite element analysis forming processes internal stresses plasticity steel stress-strain...

...Joel V. Bernier; Nathan R. Barton; Jaroslaw Knap In this study, a multiscale material model is employed to simulate two metal forming processes: 2D plane strain compression and a 3D biaxial bulge test. A generalized Taylor-type polycrystal model is employed to describe the fine scale viscoplastic...

... beam welding forming processes microhardness advanced high strength steel laser welding microhardness profile formability In order to reduce automobile weight and to increase the fuel efficiency, manufacturers are urgently seeking new steels that combine good ductility and high...

... in Metal Forming Processes ,” Int. J. Damage Mech. 1056-7895 , 9 , pp. 196 – 240 . Cherouat , A. , Saanouni , K. , and Hammi , Y. , 2002 , “ Numerical Improvement of Thin Tubes Hydroforming With Respect to Ductile Damage ,” Int. J. Mech. Sci. 0020-7403 , 44 ( 12 ), pp. 2427...

... in aluminum alloys are discussed. 10 03 2005 31 07 2006 pipes forming processes aluminium alloys extrusion tempering ductility mechanical strength hardness hardening automobile industry automotive components Recent success of aluminum tube-hydroformed components...

.... With the aid of the acquired data, finite element simulations for analyzing the forming process of TWBs were carried out using a general purpose finite element package, LS-DYNA. A localized necking criterion based on the vertex theory was employed to predict forming limit strains and failure locations...

... October 15, 2004. Review conducted by: M. F. Horstemeyer. 15 January 2004 15 October 2004 06 04 2005 steel sheet materials tensile testing microhardness tensile strength failure (mechanical) internal stresses metallography forming processes grain size laser beam welding...

.... Mater. Process. Technol. , 70 , pp. 17 – 21 . Manuscript received December 15, 2003; revision received December 27, 2004. Review conducted by: N. Chandra. 15 December 2003 27 December 2004 06 04 2005 aluminium iron forming processes surface cracks deformation...

... forming process. The uncertainty regarding some of the values used in the material model are acknowledged sources of error. However, these values been proven to accurately predict damage trends in other work undertaken at the University of Waterloo. The determination of these material properties...

... Editor: A. M. Rajendran. 31 July 2003 05 April 2004 09 11 2004 steel hardness hardness testing cold working plastic flow forming processes extrusion finite element analysis Brinell Hardness Flow Curve Effective Strain Spherical Indentation Cold Forming...

..., 2003. Associate Editor: N. Chandra. 02 December 2002 30 December 2003 29 06 2004 aluminium forming processes internal stresses surface texture surface hardening compressibility softening plasticity stress-strain relations finite element analysis Crystal...

... 18 03 2004 aluminium alloys magnesium alloys stress relaxation work hardening forming processes bending yield stress plastic deformation buckling Residual stresses are routinely developed in sheet forming. As a consequence, time-dependent relaxation processes may follow...

... cavitation tool steel aluminium jets internal stresses forming processes wear fatigue bubbles surface hardening Recently, the use of a high-speed submerged water jet with cavitation, i.e., a cavitating jet, to modify the surface of a material has been demonstrated 1 2 3...

... steel forming processes softening texture work hardening plastic deformation X-ray diffraction rolling simulation dislocation structure Sheet metal forming of low carbon steels is of considerable applied importance. Accurate prediction of Forming Limit Diagrams (FLDs) involves 1...