Analyzing distortion of aircraft Structural part in NC machining based on FEM simulation

2010 International Conference on Mechanical and Electrical Technology Pub Date : 2010-10-07 DOI:10.1109/ICMET.2010.5598480

Zhongyi Mei, Y. Wang

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引用次数: 6

Abstract

NC machining distortion theory is studied by analyzing the typical aircraft wing rib aluminum alloy structural part. The reasons which lead to machining distortion are accounted for. The research method and process of theoretical model, finite element analysis and milling experiment are presented. The effect of residual stresses on machining distortion which distribute in the aircraft structure part is analyzed. The initial residual stress distribution which generated from material heat treatment is simulated by using thermal-mechanical coupling analysis of the FEM software. Cutting simulation is executed by exploiting the static element deactivation technique. The element is deactivated via Birth/Death feature in ANSYS software. The distortion results generated by the machining simulation are compared with the actual machining data. It appears that both distortion trends are consistent. The validity of the analysis method and the finite element analysis model is verified. Several methods which can be used to predicting and controlling machining distortion are proposed.

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基于有限元仿真的飞机结构件数控加工变形分析

通过对典型飞机翼肋铝合金结构件的分析，研究了数控加工变形理论。分析了导致加工变形的原因。介绍了理论模型、有限元分析和铣削试验的研究方法和过程。分析了飞机结构件中残余应力对加工变形的影响。采用有限元软件进行热-力耦合分析，模拟了材料热处理过程中产生的初始残余应力分布。利用静态元件失活技术进行切削仿真。该元件通过ANSYS软件中的生/死功能停用。将加工仿真产生的变形结果与实际加工数据进行了比较。这两种扭曲趋势似乎是一致的。验证了分析方法和有限元分析模型的有效性。提出了几种可用于预测和控制加工变形的方法。

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2010 International Conference on Mechanical and Electrical Technology

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