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Abstract
A mathematical model is developed to describe the conditions for buckling of steel strip between transport rolls due to strip camber, together with conditions necessary for the subsequent “ironing-in” of the buckle as it passes over the downstream roll. For a permanent crease to form, the buckle must be sufficiently stable so that it is prohibited by friction to spread laterally, and the stresses from the buckle defect must be large enough for plastic deformation to occur as it travels over the downstream roll. Once the conditions to produce a permanent crease are known they can be avoided in plant operations.
Additional information
Notes on contributors
A Dixon
Dr Andrew Dixon holds a Bachelor Degree in Physics (ANU) and a Doctor of Philosophy degree in Applied Mathematics (UNSW). Before joining BHP Steel (now BlueScope Steel) he carried out research in seismology, theoretical fluid dynamics (non-linear wave interactions) and post-doctoral work in engineering fluid mechanics (the use of compliant surfaces for reducing viscous drag and the coupling of an optimisation algorithm to a flow solver for automatic optimisation of aerofoil shape for drag minimisation).
Andrew has worked in the steel industry for the past 15 years and is now a Senior Research Scientist for BlueScope Steel Research. This work has concentrated on the mathematical modelling of various aspects of the steel rolling process and steel strip transport through processing lines. This has included the rolling of strip where the deformation of the roll is comparable with that of the strip (important in thin strip or low thickness reduction rolling), the modelling of lateral spread during rolling, and the prediction of the camber or residual stresses due to non-uniform thickness reduction. More recently, emphasis has been placed on the study of strip transport through a processing line where the strip is guided by transport rolls. In particular, the conditions necessary for stable strip tracking to maintain position accuracy and to avoid strip defects, such as strip creasing, are being investigated. The emphasis of the steel research has been to develop models that elucidate the underlying physics and that are amenable to computationally fast and robust solvers.
Andrew has over 40 technical publications in international journals and conferences.
W Y D Yuen
Dr Daniel Yuen holds a Bachelor of Engineering and a Master of Engineering degree, both in Mechanical Engineering, and a Doctor of Philosophy degree in Applied Mathematics. He also holds a Graduate Diploma in Computer Science.
Daniel has been working in the steel industry for 35 years, 31 years of which was in the BHP Steel (now BlueScope Steel) Research department. He progressed through the ranks in the department, from Research Officer to Principal Research Officer and Scientific Leader (for the area of metal forming). Since 1994, he has been Manager, Rolling and Metalworking Research, managing a group carrying out research in steel processing, in particular hot and cold rolling, strip and coil processing, roll forming, and steel oxidation and pickling. His research interests are in solid mechanics – elasticity and plasticity, web mechanics, heat transfer, and oxidation of iron and steel.
Daniel has over 140 technical publications in international journals and conferences.