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The theoretical evaluating method is given for the drawability of the sheet with normal anisotropy. The generalsolution on the cracking load of deep-drawing is deduced, which is based on three kinds of hardening curve ofmaterials most in use. The distributions of stress and strain in the deformed region and the drawing force areobtained by the numerical method. The limiting drawing ratio is calculated through computer-aided simulating test.The experiments of deep-drawing to four kinds of sheet metals express that the relative errors between the predictiveand the experimental results about the cracking load and the limiting drawing ratio are within 5%. The drawabilityof common sheet metals can be quantitatively evaluated in precise terms by means of the theory and the methodadvanced in this paper.
The general evaluation of the draw load of the sheet with normal anisotropy. The generalsolution on the cracking load of deep-drawing is deduced, which is based on three kinds of hardening curves of materials in in use. The distributions of stress and strain in the deformed region and the drawing force areobtained by the numerical method. The limiting drawing ratio is calculated through computer-aided simulating test. These experiments of deep-drawing to four kinds of sheet metals express that the relative errors between the predictive and the experimental results about the cracking load and the limiting drawing ratio are within 5%. The drawability of common sheet metals can be quantitatively as in the precise terms by means of the theory and the method advance in this paper.