Finite element analysis of machining processes of turbine disk of Inconel 718 high-temperature wrought alloy based on the theorem of minimum potential energy

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• 作者：Liangbao Liu ; Jianfei Sun ; Wuyi Chen…
• 关键词：Inconel 718 turbine disk ; Finite element method ; Multi ; stage forging ; Machining distortion ; Potential energy (PE)
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：88
• 期：9-12
• 页码：3357-3369
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design;
• 出版者：Springer London
• ISSN：1433-3015
• 卷排序：88

文摘

Machining processes of Inconel 718 turbine disk including turning and broaching processes are, respectively, analyzed using the theorem of minimum potential energy. First, in order to provide the initial condition in terms of elastic strain energy for the machining processes, two-dimensional, axial symmetry assumptions are adopted and the simulation of multi-stage forging of disk is conducted and verified by the residual stresses test. Secondly, potential energy (PE) expression for the machining processes is developed. The predicted results of turning and broaching indicate that there exists an optimal value of removed material, and high level of strain energy signifies an unstable state of the structure, which could make the part deform to keep self-equilibrium.