Laboratory tests were carried out on CR1 grade steel strip involving punch stretching without lubrication and with PQ6 oil or polythene as lubricant. The finite element code was then used to simulate the forming behaviour during the test. The effects of normal anisotropy of the material and the contact friction between punch/die and the specimen on the forming behaviour were studied systematically. The predictability of the finite element modelling was confirmed by direct comparisons between the experimental measurements and the computer predictions. The aspects of further refinements required in the finite element models are discussed.
MST/1887
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