Characterization of Local Residual Stress at Blade Surfaces by the V(z) Curve Technique
Characterization of Local Residual Stress at Blade Surfaces by the V(z) Curve Technique
复制标题
通过 V(z) 曲线技术表征叶片表面的局部残余应力
作者：
Xiang YX;Teng D;邓明晰;Li Y;Liu CJ;Xuan FZ
复杂构件残余应力的表征是一个棘手的问题。本文采用基于瑞利面波的V(z)曲线法对航空发动机叶片的残余应力分布进行了评估。首先，利用V(z)曲线技术测量了Rayleigh表面波在航空发动机叶片中的速度，由于速度的变化与残余应力的贡献相关，因此可以利用V(z)曲线技术计算局部残余应力。采用球枪人工诱导残余应力分布的方法制备了两种塑性变形Ti-6Al-4V试样，并用该方法进行了测量。结果表明，两种试样的残余应力分布均具有可预测的对称性。所测应力误差远小于Ti-6Al-4V屈服应力的10%（约800 MPa）。最后，用x射线衍射法对测得的残余应力进行了验证，结果吻合较好。所提出的V(z)曲线方法及其实验装置似乎在点状区域（如复杂部件）的残余应力表征方面具有潜力。
The characterization of residual stress in complicated components is a tough issue. The method of Rayleigh surface wave-based V(z) curve is adopted in this work to evaluate the distribution of residual stresses in aeroengine blades. First, the velocity of Rayleigh surface wave in aeroengine blade was measured by the V(z) curve technique, which can be used to calculate the local residual stress because the change of velocity is thought to be correlated with the contribution from residual stress. Two kinds of plastic-deformed Ti-6Al-4V samples were fabricated by ball-gun shooting to artificially induce distribution of residual stress and then measured by the proposed method. The results indicate that the distribution of the residual stress in both of the samples displays a predictable symmetry. The error of the measured stress is much less than 10% of the yielding stress in Ti-6Al-4V (i.e., about 800 MPa). Finally, the measured residual stresses were verified by X-ray diffraction method, whose results correlate reasonably well with each other. The proposed V(z) curve method and its experimental set-up appear to be a potential in characterizing residual stress at a point-like region, such as in complicated components.
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DOI：
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发表时间：
2015
期刊：
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影响因子：
--
作者：
A. Joseph;P. Palanichamy;T. Jayakumar
通讯作者：
A. Joseph;P. Palanichamy;T. Jayakumar
影响因子：
--
作者：
HUGHES, DS;KELLY, JL
通讯作者：
KELLY, JL
影响因子：
1.4
作者：
Y. Javadi;khaled azari;S. Ghalehbandi;M. Roy
通讯作者：
Y. Javadi;khaled azari;S. Ghalehbandi;M. Roy
影响因子：
1.6
作者：
M. Ceretti;C. Braham;J. Lebrun;J. Bonnafe;M. Perrin;A. Lodini
通讯作者：
M. Ceretti;C. Braham;J. Lebrun;J. Bonnafe;M. Perrin;A. Lodini
影响因子：
1.7
作者：
Bray, DE;Tang, W
通讯作者：
Tang, W