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《Forging & Stamping Technology》 2010-01
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Model of constitutive relationship for TB8 alloy based on BP neural network

ZHANG Qing1,LI Ping2,XUE Ke-min2(1.Department of Mechanical Engineering,Anhui Vocational and Technical College,Hefei 230051,China;2.Institute of Material Science and Engineering,Hefei University of Technology,Hefei 230009,China)  
Isothermal compression tests on TB8 alloy were conducted using Gleeble 1500 thermomechanical test system and the flow stress values at deferent deforming condition were obtained.Based on the experiment data corrected for friction,the constitutive relationship model was constructed in the shape of 3×10×1BP artificial neural network.The results show that the artificial neural network models have excellent capability under the conditions that the number of nodes in the hidden layer is 10,the learning rate is 0.05 and the momentum factor is 0.4.It can describe the influences of the temperature,strain rate and true strain on the flow stress accurately,and also provide basis for determining hot forming process and numerical simulation.
【CateGory Index】: TG115.53
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