基于力阻效应的CFRP试件传感特性的试验研究
发布时间：2018-12-13 03:12
【摘要】：基于碳纤维复合材料传感原理,推导电阻变化率与应变的关系公式,通过CFRP试件轴向拉伸试验,得到试件的初始电阻和伏安特性曲线,研究了在三个不同的应变阶段,试件电阻变化率随应变的变化关系,并通过线性拟合得到初始阶段CFRP试件的灵敏度。试验结果表明:当应变小于0.8%时,电阻变化率随应变变化较快,表现出良好的线性关系,具有良好的力阻效应;当应变在0.8%~2.4%之间时,电阻变化率随应变的变化速度降低,电阻-应变关系曲线出现波动;当应变大于2.4%时,电阻变化率急剧增长,试件破坏。
[Abstract]:Based on the sensing principle of carbon fiber composites, the relationship between resistance change rate and strain is derived. The initial resistance and volt-ampere characteristic curves of CFRP specimen are obtained by axial tensile test, and three different strain stages are studied. The change rate of resistance varies with strain, and the sensitivity of CFRP specimen at initial stage is obtained by linear fitting. The experimental results show that when the strain is less than 0.8, the resistance rate changes rapidly with the strain, showing a good linear relationship and good resistance effect. When the strain is between 0.8% and 2.4%, the resistance change rate decreases with the strain, and the resistance strain relation curve fluctuates. When the strain is greater than 2.4%, the resistance change rate increases sharply and the specimen is destroyed.
【作者单位】： 江苏大学土木工程与力学学院;
【基金】：国家自然科学基金项目(51478209);国家自然科学基金青年基金(51508235) 江苏省科技厅基金(BK20140553)
【分类号】：TB332
本文编号：2375768
[Abstract]:Based on the sensing principle of carbon fiber composites, the relationship between resistance change rate and strain is derived. The initial resistance and volt-ampere characteristic curves of CFRP specimen are obtained by axial tensile test, and three different strain stages are studied. The change rate of resistance varies with strain, and the sensitivity of CFRP specimen at initial stage is obtained by linear fitting. The experimental results show that when the strain is less than 0.8, the resistance rate changes rapidly with the strain, showing a good linear relationship and good resistance effect. When the strain is between 0.8% and 2.4%, the resistance change rate decreases with the strain, and the resistance strain relation curve fluctuates. When the strain is greater than 2.4%, the resistance change rate increases sharply and the specimen is destroyed.
【作者单位】： 江苏大学土木工程与力学学院;
【基金】：国家自然科学基金项目(51478209);国家自然科学基金青年基金(51508235) 江苏省科技厅基金(BK20140553)
【分类号】：TB332
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