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This paper presents the development and simulation results of a computer simulation software for the lateral position control of a moving web in roll-to-roll (R2R) systems. Mathematical models of the web dynamics are described first to explain the lateral motion of a moving web. Based on the models, a controller that employs the PID control method is developed, and embedded in simulation softwa...

the effect of pre-existing nano sized precipitates on the mechanisms and rate of grain refinement has been investigated during the severe plastic deformation. a binary al–0.2sc alloy, containing coherent al3sc particles, of 3.62 nm in diameter has been deformed by accumulative roll bonding up to 10 cycles. the resulting deformed structures were quantitatively analyzed using electron backscatter...

Four-roll bending process is usually used for manufacturing of seamed thick-walled and thin-walled cylinders. Due to complexity of this process, the analytical solution of plate bending in this process has not been developed completely. The existence of friction and multi-step processing makes it more difficult. Investigation of four-roll bending process using analytical and numerical methods i...