作者：王彪¹, 刘腾¹, 徐敬龙¹, 刘马宝²

作者单位：1. 西安交通大学航天航空学院, 陕西 西安 710049;
2. 西安交通大学 机械结构强度与振动国家重点实验室, 陕西 西安 710049

关键词：金属粘贴式电阻应变计;胶接层;应变传递;测量准确度

摘要：

通过建立金属粘贴式电阻应变计的二维应变传递解析计算模型，对金属粘贴式电阻应变计的应变传递机理进行深入分析。结果表明，金属粘贴式电阻应变计的应变传递过程受敏感栅、基底及胶接层的几何参数和物理特性参数影响，且在金属粘贴式电阻应变计敏感栅两端存在应变过渡区。当胶接层横向宽度越宽、厚度越薄、弹性模量越大时，敏感栅两端的应变传递过渡区就越小，金属粘贴式电阻应变计的平均应变传递率则越大。因此，在实际应用中，应优先选择高弹性模量的胶粘剂，且必须严格控制金属粘贴式电阻应变计的粘贴工艺。

Strain transferring analysis of metallic bonded resistance strain gauges

WANG Biao¹, LIU Teng¹, XU Jinglong¹, LIU Mabao²

1. School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
2. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, China

Abstract: A 2D analytical model is proposed to investigate the strain transferring mechanism of the metallic bonded resistance strain gauge. The results show that the strain of the structure cannot be transferred effectively to the grid of metallic bonded resistance strain gauge due to the influence of geometric parameters and mechanical properties of the grid, matrix and adhesive layer, and there are two strain transition regions at both ends of the grid. Moreover, the wider, thinner and stiffer adhesive layer can help decrease the strain transition region and increase the average strain transmission rate. According to the results, conclude that adhesive materials with higher Young's Modulus should be given priority in practical application, and the bonding technology of resistance strain gauges must be strictly controlled.

Keywords: metallic bonded resistance strain gauge;adhesive layer;strain transferring;measurement accuracy

2016, 42(8): 1-6  收稿日期: 2016-3-10;收到修改稿日期: 2016-4-19

基金项目: 国家自然科学基金项目（51175404）

作者简介: 王彪(1992-),男,云南玉溪市人,硕士研究生,专业方向为飞行器结构健康检测与可靠性。

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