9) Define the rolling resistance.
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- Questions: 1. Two thick slabs of 300mm each, the first one is used in cold rolling where u=0.08 while the second is used in cold rolling where u-0.5. The mill roll diameter in each case is the same as 600mm. Determine the max draft (reduction) in both cases. Discuss the wide difference in results. = 2. A tensile specimen of the metal of 100 mm is length stretched to a length 157 mm during the rolling process. If the metal has a flow curve with parameters: K = 850 MPa and strain hardening exponent n = 0.30. Determine the average flow stress that the metal has been subjected to during the deformation.Name, draw a neat sketch and explain why each of the following designs of rolling mill are used instead of a basic two high rolling mill. i) ii) A mill consisting of four roller A mill consisting of six or more rollers7) Which of the following types of stresses are induced in the stretch forming process? Tensile only. OCompressive only. A combination of tensile and compressive stresses. A combination of tensile, compressive and shear stresses