%0 Journal Article
	%A Maziar Ramezani and  Zaidi Mohd Ripin
	%D 2009
	%J International Journal of Mechanical and Mechatronics Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 32, 2009
	%T Effect of Friction Models on Stress Distribution of Sheet Materials during V-Bending Process
	%U https://publications.waset.org/pdf/10800
	%V 32
	%X In a metal forming process, the friction between the 
material and the tools influences the process by modifying the stress 
distribution of the workpiece. This frictional behaviour is often taken 
into account by using a constant coefficient of friction in the finite 
element simulations of sheet metal forming processes. However, 
friction coefficient varies in time and space with many parameters. 
The Stribeck friction model is investigated in this study to predict 
springback behaviour of AA6061-T4 sheets during V-bending 
process. The coefficient of friction in Stribeck curve depends on 
sliding velocity and contact pressure. The plane-strain bending 
process is simulated in ABAQUS/Standard. We compared the 
computed punch load-stroke curves and springback related to the 
constant coefficient of friction with the defined friction model. The 
results clearly showed that the new friction model provides better 
agreement between experiments and results of numerical simulations. 
The influence of friction models on stress distribution in the 
workpiece is also studied numerically
	%P 990 - 995