选择不同应变花对主应力测试结果的影响

发布时间：2018-01-03 21:37

本文关键词：选择不同应变花对主应力测试结果的影响　出处：《实验室研究与探索》2016年07期 　论文类型：期刊论文

【摘要】：为精确得到应力梯度较大点的应力状态,对5种应变片黏贴方案(即45°-3直角应变花、60°-3等角形应变花、120°-3Y形应变花、45°-4扇形应变花及多次黏贴单轴应变片)分别进行了研究,求解出待测点位的应力状态。利用ANSYS对构件上同一点的应力状态进行数值计算,并将实测值与数值计算结果进行对比与误差分析。结果表明,不同种类应变花布片方案测试结果存在差异,采用多次黏贴单轴应变片方案的测量结果更为准确。
[Abstract]:In order to obtain the stress state of high stress gradient accurately, five kinds of strain gauge adhesion schemes (45 掳-3 right angle strain flower 60 掳-3 isangular strain flower) 120 掳-3Y shape strain flower were obtained. The 45 掳-4 sector strain pattern and the multiple adhesion uniaxial strain gauge) were studied, and the stress state of the measured point was solved. The stress state at the same point on the member was numerically calculated by ANSYS. The results of comparison and error analysis between the measured values and the numerical results show that there are differences in the test results of different kinds of strain-pattern sheets, and the measurement results using the multiple adhesion uniaxial strain-gauge scheme are more accurate.
【作者单位】：河海大学水利水电学院;河海大学力学与材料学院;
【基金】：国家自然科学基金青年项目(11402074) 河海大学创新性教学实验项目
【分类号】：O348.2
【正文快照】： 0引言电阻应变测量方法是将根据电阻应变效应制成的电阻应变片黏贴在构件表面,得到待测点的线应变,再根据应力-应变本构关系确定构件表面应力状态的一种实验应力分析方法。经过几十年的发展,电阻应变测量技术已成为一种相当成熟的测试手段,在工程技术领域得到了非常广泛的应用

【相似文献】