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船用发动机曲轴单拐的塑性成形仿真分析
刘培培, 何朝聪, 张春丽
上海师范大学
摘要:
以船用发动机曲轴单拐为研究对象,通过SolidWorks软件建立曲轴单拐锻造过程中毛坯、模具的三维模型,在金属塑性成形CAE软件DEFROM-3D平台上进行模拟仿真,以探究不同应变速率、温度下金属塑性变形过程中的金属内部流变应力与外部变形条件之间的关系,并对所得的数据进行了科学分析.分析结果表明:当应变速率为定值时,预设温度越高,应力-应变曲线则相对降低;当毛坯温度一定时,应变速率越高则试样内部流变应力越大,抗疲劳强度越差.该结果也为下一步的优化设计提供理论依据.
关键词:  曲轴单拐  塑性成形  应力  应变
DOI:
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Plastic forming simulation analysis of marine engine crankshaft single-throw
LIU Peipei, HE Chaocong, ZHANG Chunli
College of Informiation,Mechanical and Electrical Engineering,Shanghai Normal University
Abstract:
The research object is for marine engine crankshaft single-throw.A 3D model of the crankshaft single-throw blank and die in forging process is established by SolidWorks software,then the 3D model is imported into metal plastic forming CAE software DEFROM-3D to carry on the plastic forming simulation,to verify the relationship between the internal flow stress and the external deformation conditions in the process of metal plastic deformation under different strain rate and temperature,and to carry on the scientific analysis based on the obtained data.The result shows that the preset temperature is higher,the stress-strain curve is relatively lower when the strain rate is constant.Sample internal flow stress will be greater and the resistance to fatigue strength will be poorer at a higher strain rate when the temperature of the blank is constant.The result also provides a theoretical basis for further optimization design.
Key words:  crankshaft single-throw  plastic forming  stress  strain