| 高温应变栅丝蠕变对应变测量精度影响与补偿 |
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| 引用本文： | 王文瑞,王刚,胡挺,张佳明.高温应变栅丝蠕变对应变测量精度影响与补偿[J].北京科技大学学报,2017,39(1). |
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| 作者姓名： | 王文瑞 王刚 胡挺 张佳明 |
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| 作者单位： | 1. 北京科技大学机械工程学院,北京100083;北京科技大学新型飞行器技术研究中心,北京100083;2. 北京科技大学机械工程学院,北京,100083;3. 北京福田康明斯发动机有限公司,北京,102206 |
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| 基金项目： | 国家重大科学仪器设备开发专项资助项目，航空科学重点实验室基金资助项目，中央高校基本科研业务费资助项目 |
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| 摘 要： | 接触式应变测量是材料和构件高温力学行为研究的必要手段,其测量精度是高温应变测量领域关注的热点,而应变栅丝的高温蠕变性能是测量精度的主要影响因素.本文首先根据材料蠕变机理分析应变片的蠕变特性,搭建高温应变栅丝蠕变电测的系统,基于诺顿蠕变规律与试验的测量结果,建立应变栅丝的高温蠕变模型.论文基于应变栅丝蠕变输出有限元模型,对栅丝蠕变输出的影响因素进行研究;最后建立了高温应变蠕变补偿模型,以提高高温应变测量精度,并取得了试验验证.
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| 关 键 词： | 高温 蠕变 应变片 应变测量 精度 |
Influence of high temperature strain grid wire creep on strain measurement precision and its compensation |
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| WANG Wen-rui,WANG Gang,HU Ting,ZHANG Jia-ming.Influence of high temperature strain grid wire creep on strain measurement precision and its compensation[J].Journal of University of Science and Technology Beijing,2017,39(1). |
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| Authors: | WANG Wen-rui WANG Gang HU Ting ZHANG Jia-ming |
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| Abstract: | Contact strain measurement is a tool for studying the high temperature mechanical behavior of components and materials.The measurement precision is the key point of the high temperature strain measurement field,where creep is the main factor that affects the measurement precision at high temperature.In this paper,the creep characteristics of strain gauges were analyzed according to the material mechanism of creep by a high temperature strain measurement system.A grating creep model was obtained from the creep rule and experiment measurement results.Based on the grating creep model,the influence factors of strain gauge creep output were studied by the finite element model.Finally,a compensation model of high temperature strain creep was established to improve this high temperature strain measurement precision,and it was validated by experimental data. |
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| Keywords: | high temperature creep strain gauges strain measurement precision |
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