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Constitutive relation measurement of geological mechanics similar material based on fiber Bragg grating

机译：基于光纤布拉格光栅的地质力学类似材料的本构关系测量

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摘要

The constitutive relation of geological mechanics similar material is the basis of the geological mechanics experiment. It is obtained using stress curves and strain curves from the uniaxial compression test of square specimen. However, the traditional measuring method exhibits a nonignorable error for similar material owing to its boundary effect. An approach based on embedding a bare fiber Bragg grating (FBG) sensor into a specimen is presented for measuring the constitutive relation of the similar material. The error of the traditional approach was examined by simulation, and the results of measurement in different frictions were compared. The simulation result revealed that the error increases with friction when the sensor was pasted on the surface. When the sensor was embedded in the middle of the specimen, the friction was less effective. Two similar FBG sensors were used in the measurement of similar material for verification: one embedded into the specimen and another pasted on the surface. The friction was varied using silicone oil. Experimental results agreed well with the simulation results, indicating that the approach of embedding bare FBG into a specimen can measure the constitutive relation precisely, and it is more accurate than the traditional approach.
机译：地质力学类似材料的本构关系是地质力学实验的基础。使用来自方形样品的单轴压缩试验的应力曲线和应变曲线获得。然而，由于其边界效应，传统的测量方法对类似材料表现出不可能的误差。提出了一种基于将裸光纤布拉格光栅（FBG）传感器嵌入到样品中的方法，用于测量类似材料的本构体关系。通过仿真检查了传统方法的误差，比较了不同摩擦的测量结果。仿真结果显示，当传感器粘贴在表面上时，误差随着摩擦而增加。当传感器嵌入样品的中间时，摩擦效果效果较小。使用两个类似的FBG传感器用于测量类似的材料进行验证：嵌入样品中，并粘贴在表面上。使用硅油改变摩擦。实验结果与仿真结果相同，表明将裸FBG嵌入裸FBG进入标本的方法可以精确地测量本构体关系，而且比传统方法更准确。

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  • 来源
    《Optical engineering》 |2017年第2期|024105.1-024105.7|共7页
  • 作者

    Zewei You; Yuan Wang; Yangyang Sun; Qinghua Zhang; Zhenglin Zhang; Xiaodi Huang;

  • 作者单位

    PLA University of Science and Technology State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact Nanjing China;

    PLA University of Science and Technology State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact Nanjing China;

    PLA University of Science and Technology State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact Nanjing China;

    PLA University of Science and Technology State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact Nanjing China;

    PLA University of Science and Technology State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact Nanjing China;

    PLA University of Science and Technology State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact Nanjing China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    constitutive relation; geological mechanics model similar material; fiber Bragg grating; boundary effect; uniaxial compression test;

    机译：构成关系;地质力学模型类似材料;纤维布拉格光栅;边界效应;单轴压缩测试;

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