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首页> 外文期刊>Applied Sciences >A Strain-Transfer Model of Surface-Bonded Sapphire-Derived Fiber Bragg Grating Sensors
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A Strain-Transfer Model of Surface-Bonded Sapphire-Derived Fiber Bragg Grating Sensors

机译：表面键合蓝宝石衍生光纤布拉格光栅传感器的应变转移模型

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摘要

An improved strain-transfer model was developed for surface-bonded sapphire-derived fiber Bragg grating sensors. In the model, the core and cladding of the fiber are separated into individual layers, unlike in conventional treatment that regards the fiber as a unitive structure. The separation is because large shear deformation occurs in the cladding when the core of the sapphire-derived fiber is heavily doped with alumina, a material with a high Young’s modulus. Thus, the model was established to have four layers, namely, a core, a cladding, an adhesive, and a host material. A three-layer model could also be obtained from the regressed four-layer model when the core’s radius increased to that of the cladding, which treated the fiber as if it were still homogeneous material. The accuracy of both the four- and three-layer models was verified using a finite-element model and a tensile-strain experiment. Experiment results indicated that a larger core diameter and a higher alumina content resulted in a lower average strain-transfer rate. Error percentages were less than 1.8% when the four- and three-layer models were used to predict the transfer rates of sensors with high and low alumina content, respectively.
机译：开发了一种改进的应变转移模型，用于表面键合的蓝宝石衍生的纤维布拉格光栅传感器。在该模型中，光纤的芯和包层被分离成各个层，与常规治疗相同，这将纤维视为整体结构。分离是因为在蓝宝石衍生的纤维的核心大量掺杂有氧化铝的核心，具有高杨氏模量的材料时，在包层中发生大的剪切变形。因此，建立模型以具有四层，即芯，包层，粘合剂和主体材料。当核心的半径增加到包层的纤维的半径增加到纤维的纤维仍然是均匀的材料，也可以从回归的四层模型获得三层模型。使用有限元模型和拉应变实验验证了四层模型的精度。实验结果表明，较大的芯直径和较高的氧化铝含量导致较低的平均菌株转移率。当使用四层和三层模型来预测具有高和低氧化铝含量的传感器的传递速率时，误差百分比分别小于1.8％。

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