PRODUCTION PROCESS Evaluation of friction in upsetting
نویسنده
چکیده
Distributions of contact stresses at the neutral point in metal forming are very hard to be properly predicted due to the complex interface situation and lack of suitable friction models. In this paper, the dynamic friction model in which the friction depends on both time rate of strain and normal pressure has been applied to predict contact stresses in cylinder upsetting. Case studies have shown that the predicted results agreed with the experimental data chosen from literature. By comparing with two other friction models, the dynamic friction model seemed to give a better solution.
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