مقاله جوشکاری FINITE ELEMENT MODELING OF RESISTANCE SPOT WELDING PROCESS

مقاله جوشکاری به عنوان :

FINITE ELEMENT MODELING OF RESISTANCE SPOT WELDING
PROCESS
P. Chigurupati*, B.K Chun, A. Bandar, W.T Wu
Scientific Forming Technologies Corporation
2545 Farmers Drive, Suite 200, Columbus, OH 43235, USA

چکیده: 

ABSTRACT: Weld quality in Resistance Spot Welding is directly influenced by competing process transients. These
transients are caused by electrical, thermal, mechanical and metallurgical interactions. Controlling the process variables
such as current, clamping force and welding time requires good understanding of how these interactions evolve during
the welding process. In order to better understand the process and to control the final product quality in an efficient
manner, a comprehensive process model that can account for these multi physics phenomena is required. This paper
describes a general methodology that is used in the commercial Finite Element code, DEFORMTM to model the
resistance spot welding process incorporating all the basic mechanics of deformation, thermal, electrical and
microstructure models. Modeling process is illustrated using an example from the published literature. A detailed
discussion of the process mechanics based on the observed transients during various stages of the spot welding process
are presented. Model predictions on the thermal, mechanical and evolving microstructural phases during the welding
process are also discussed.