Curvature-insensitive methodology for thermal-wave depth-profilometry in multi-layered curvilinear solids

Curvature-insensitive methodology for thermal-wave depth-profilometry in multi-layered curvilinear solids
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多层曲线固体中热波深度轮廓测量的曲率不敏感方法

DOI:
10.1088/0022-3727/43/28/285403
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发表时间:
2010-07
影响因子:
3.4
通讯作者:
Wang, Chinhua
Wang, Chinhua
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
M;elis, Andreas;Yuan, Xiao;Liu, Liwang;Wang, Chinhua

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本文提出了一种描述曲线(圆柱形和球形)固体中连续变化的热物理性质深度剖面的广义相似归一化(SN)方法。具体地,基于圆柱、球形和平板等多层结构固体的理论模型,介绍了从整体光热信号中消除表面曲率效应的原理和物理机制。详细讨论了曲面曲率半径的相对值、非均匀表面层的厚度和测量方位角对该方法有效性的影响。基于曲线理论和等效平面理论,对不同直径的淬硬圆柱形钢棒的热物理深度分布进行了实验重建。对重建结果进行了比较和验证。
A generalized similarity normalization (SN) methodology for characterizing depth profiles of continuously varying thermophysical properties in curvilinear (cylindrical and spherical) solids is presented. Specifically, the principle and the physical mechanism of the elimination of the surface curvature effect from the overall photothermal signal is introduced based on theoretical models of cylindrical, spherical and flat solids with multi-layer structures. The effects of the relative values of radii of curvature of the curvilinear solid, the thickness of the inhomogeneous surface layer and the measurement azimuthal angle on the validity of the technique are discussed in detail. Experimental reconstructions of thermophysical depth profiles of hardened cylindrical steel rods of various diameters are performed based on both curvilinear theory and the equivalent flat surface theory. The reconstructed results are compared and validated.
DOI: 10.1063/1.1146443
发表时间: 1995-06
影响因子: 1.6
作者:
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