Measurement of Residual Stress in Titanium Alloy Wide-Chord Hollow Fan Blade Based on Multiple-Cut Contour Method

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

Experimental Techniques Pub Date : 2024-01-24 DOI:10.1007/s40799-024-00698-w

L.-X. Fan, N. Han

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引用次数: 0

Abstract

Hollow fan blades made of titanium alloy are widely used in turbofan engines, and the residual stress (RS) inside the blades directly affects the performance of the blades and even the engine. Therefore, it is crucial to measure and study the RS distribution of titanium alloy hollow fan blades. This paper aims to investigate the RS distribution on the cross-section of a wide-chord hollow fan blade made of Ti-6Al-4 V titanium alloy. The multiple-cut contour method is utilized to determine the RS. A theoretical model of the multiple-cut contour method for fan blades is established, and the specimen was cut three times, followed by contour measurement of the cut planes, data processing and elastic finite element analysis. The RS map of the three cut planes is finally presented. The normal RS on three cross-sections of the fan blade is uniformly distributed, ranging from -50 MPa to 50 MPa. The normal RS distribution at different positions for the hollow fan blade can be obtained by the proposed multiple-cut contour method. The findings of this research provide a comprehensive insight into the distribution of RS in wide-chord hollow fan blades made of Ti-6Al-4 V titanium alloy.

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基于多切面轮廓法的钛合金宽弦空心风扇叶片残余应力测量

钛合金空心风扇叶片广泛应用于涡扇发动机，叶片内部的残余应力（RS）直接影响叶片甚至发动机的性能。因此，测量和研究钛合金空心风扇叶片的 RS 分布至关重要。本文旨在研究由 Ti-6Al-4 V 钛合金制成的宽弦空心风扇叶片横截面上的 RS 分布。采用多切轮廓法确定 RS。建立了风扇叶片多重切割轮廓法的理论模型，并对试样进行了三次切割，然后对切割平面进行了轮廓测量、数据处理和弹性有限元分析。最后给出了三个切割面的 RS 图。风扇叶片三个截面上的法向 RS 分布均匀，范围在 -50 MPa 至 50 MPa 之间。通过所提出的多切面等值线方法，可以得到空心风扇叶片不同位置的法向 RS 分布。该研究结果全面揭示了由 Ti-6Al-4 V 钛合金制成的宽弦空心风扇叶片的 RS 分布情况。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Experimental Techniques 工程技术-材料科学：表征与测试

CiteScore

3.50

自引率

6.20%

发文量

审稿时长

5.2 months

期刊介绍： Experimental Techniques is a bimonthly interdisciplinary publication of the Society for Experimental Mechanics focusing on the development, application and tutorial of experimental mechanics techniques. The purpose for Experimental Techniques is to promote pedagogical, technical and practical advancements in experimental mechanics while supporting the Society''s mission and commitment to interdisciplinary application, research and development, education, and active promotion of experimental methods to: - Increase the knowledge of physical phenomena - Further the understanding of the behavior of materials, structures, and systems - Provide the necessary physical observations necessary to improve and assess new analytical and computational approaches.