Research on creation and application of material models in the rolling process of medium and heavy plate leveler
Mechanical properties model of moderate/high temperature material affects leveling parameters setting. This article establishes the model as well as self-studying in rolling process and simplex optimizes the formulation of material model's deformation resistance. The model is established through this process which has a higher application in the actual production.
Investigation Into the Effects of Leveling Roll Diameter Variation on Coupling Shear Pin Breakage of a Hot Plate Leveler
A new model to calculate the effect of leveling roll size variation was developed based on contact mechanics. The model calculates the additional torque induced by the roll diameter variation and the tolerable roll diameter variation for integrated driving levelers.
Finite element analysis of the three-point bending of sheet metals
Abstract Cyclic three-point bending tests on two types of sheet metals, mild steel and high strength steel, are reported. The bending process tends to a steady cycle upon applying repeated cycles of displacements. Strain hardening and Bauschinger effects for both materials were detected. Three finite element models are presented to simulate the three-point bending numerically. Different hardening laws are used with the simplified non-contact finite element model. The isotropic hardening law over-estimates the hardening component by missing the Bauschinger effect and the plastic shakedown. The kinematic hardening rule under-estimates the hardening component and exaggerates the Bauschinger effect. The combination of isotropic and non-linear kinematic hardening predicts accurately both the Bauschinger effect and the plastic shakedown. The hardening parameters in the combined model are identified inversely by using a micro-genetic algorithm. Cyclic stress–strain curves are generated based on the identified material parameters.