摘要
由于应变片具有横向效应,在平面应力场的测量中会带来一些误差,特别是针对各向异性的复合材料,必须对测量结果进行修正。采用了一种修正方法对试验测量数据进行了修正,通过测量值和修正值的对比分析,得到了应变片横向效应对复合材料应变数据准确性的影响,以及数据无需修正的范围。试验结果表明:随着电阻应变测量值绝对值的增大,因电阻应变片横向效应引起的误差值所占比率会降低;当复合材料应变绝对值大于200με时,横向效应引起的误差值所占比例降低到2%以下,可以忽略其对测量数据的影响。
Due to the transverse‐sensitivity effect of strain gages ,the measurement in the biaxial stress field will has some errors w hich are especially for orthotropic‐composite materials ,and the measurement results must be amended .In this paper ,a modified method is used for measurement data .Through comparative analysis between measuring data with modifying data ,we can achieved the influence of the transverse‐sensitivity effect of strain gages on the measurement re‐sults and ignored extents of unmodified data .The test results show that with the increase of absolute data for strain meas‐urement ,the error rate will reduced ;when the absolute data is out of 200με,the error rate will below 2% ,so the influence of the transverse‐sensitivity effect to measuring data on composite materials structure can be ignored .
出处
《国外电子测量技术》
2015年第3期19-22,共4页
Foreign Electronic Measurement Technology
关键词
电阻应变片
横向效应
复合材料
应变数据
resistance strain gages
transverse-sensitivity effect
composite materials
strain
作者简介
韩凯，1985年出生，工学硕士，工程师，主要研究方向为全尺寸飞机结构静力/疲劳试验的数据采集与分析。E—mail：hank03@qq．com
