2023年 第22卷 第3期
《工程（英文）》 >> 2023年 第22卷 第3期 doi: 10.1016/j.eng.2022.07.018
基于变形力监测数据的残余应力场推断和表征方法
a College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
b School of Engineering, University of Greenwich, Chatham Maritime ME4 4TB, UK
# These authors contributed equally to this work.
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摘要
残余应力是材料的基本属性之一，与零件的几何/尺寸稳定性和疲劳寿命直接相关。针对具有高精度要求的大型零件，其残余应力场的准确测量和预测一直是一个挑战。目前的残余应力场测量技术分为基于应变的有损法以及效率和精度较低的无损法。本文提出了一种基于变形力推断残余应力场的无损法。本方法通过能够反映去除材料后不平衡残余应力场整体效应的变形力来推断零件的残余应力场。利用虚功原理建立了变形力与残余应力场之间的力学关系，并引入正则化方法求解残余应力场。为验证方法的有效性，本文进行了理论验证和实际实验验证。实验结果表明，该方法对于大型结构件的残余应力场测量具有可靠的精度和灵活性。在数字化和智能制造的趋势下，该方法的基本原理为利用加工监测数据预测和补偿由残余应力引起的零件加工变形提供了重要参考。
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