Accuracy of Young’s Modulus of Thermal Barrier Coating Layer Determined by Bending Resonance of a Multilayered Specimen
Accuracy of Young’s Modulus of Thermal Barrier Coating Layer Determined by Bending Resonance of a Multilayered Specimen
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通过多层试件的弯曲共振测定热障涂层杨氏模量的准确度
DOI：
10.1007/s11666-016-0399-3
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发表时间：
2016
影响因子：
3.1
通讯作者：
S. Takahashi
中科院分区：
文献类型：
--
作者：
H. Waki;K. Takizawa;Masahiko Kato;S. Takahashi
热障涂层体系中各层的杨氏模数是一种重要的力学性能，因为它可以确定热障涂层体系中的材料力学参数。在这项研究中，我们研究了根据由衬底、粘结层和热障涂层组成的多层试件的第一次弯曲共振来评估热障涂层杨氏模量的方法的准确性。首先，我们利用复合材料梁弯曲振动的运动方程，推导出了TBC层杨氏模数的封闭解。三层模型的解根据测量的共振频率和所有其他层的尺寸、质量和杨氏模量值提供了TBC层的杨氏模量值。接下来，我们分析了这些输入误差对评估的杨氏模数的敏感性，并揭示了准确评估的重要输入。最后，通过实验验证了所提出的方法能够准确地得到热障涂层的杨氏模数。
The Young’s modulus of individual layer in thermal barrier coating (TBC) system is an important mechanical property because it allows determining the parameters of materials mechanics in the TBC system. In this study, we investigated the accuracy of the evaluation method for the Young’s modulus of a TBC layer according to the first bending resonance of a multilayered specimen comprising a substrate, bond coating, and TBC. First, we derived a closed-form solution for the Young’s modulus of the TBC layer using the equation of motion for the bending vibration of a composite beam. The solution for the three-layered model provided the Young’s modulus of the TBC layer according to the measured resonance frequency and the known values for the dimensions, mass, and Young’s moduli of all the other layers. Next, we analyzed the sensitivity of these input errors to the evaluated Young’s modulus and revealed the important inputs for accurate evaluation. Finally, we experimentally confirmed that the Young’s modulus of the TBC layer was obtained accurately by the developed method.