碳粉掺量对碳纤维筋材力阻效应的影响

为研究不同碳粉掺量改性基体对碳纤维增强复合材料（CFRP）筋力阻效应的影响，制作了碳粉掺量（质量分数）分别为0%，2%，4%，6%，8%的5组碳粉改性CFRP筋材，通过轴向拉伸试验研究其电阻 应变行为。结果表明:碳粉会降低碳纤维筋材的电阻，碳粉改性CFRP筋材在低应力水平阶段的电阻变化率-应变关系线性较好，线性判定系数在0.92以上，灵敏度值在20~30之间；极限应变为3%~5%，最大电阻变化率为35%~60%；在低应力水平阶段，碳粉掺量对灵敏度值影响较小。

Effect of Carbon Powder Dosage on CFRP Tendon Piezoresistivity

In order to study the effect of carbon powder dosage on carbon fiber reinforced polymer (CFRP) tendon piezoresistivity, five groups of CFRP tendons with different carbon powder dosage(0%, 2%, 4%, 6%, 8%)were produced, and the resistance strain behavior was studied through axial tensile test. The results show that carbon powder reduces the initial CFRP tendon resistance, CFRP tendon has good linear relationship between resistance change rate and strain at low stress level, the linear correlation coefficient is above 0.92, the sensitivity value is 20 to 30. The ultimate strain of CFRP tendon is 3% to 5%, the maximum resistance rate is 35% to 60%. The effect of carbon powder dosage on CFRP tendon sensitivity is less at low stress level.