针对碳纤维复合材料矩形截面管的抗弯性能,设计了五种不同铺层方案的矩形截面管.应用有限元软件Abaqus对其三点弯曲进行了仿真分析;并通过粘贴光栅光纤传感器,应用万能试验机对实验件进行了三点弯曲实验.分别获得了仿真和实验相应载荷下矩形截面管下表面中间位置的应变值,进行一次拟合后获得相应的载荷-应变曲线,从而得出仿真和实验抗弯刚度值EI.通过对比,两者的结果具有很好的一致性.结果表明:0°比例越高,抗弯性能越好.
According to the bending capability of rectangular cross section(RCS) tube made of carbon fiber reinforced plastic (CFRP),five different layer schemes of the tubes were designed.The finite element software Abaqus was used to analysis the three point bending test,and the strain of the middle position on the bottom surface was obtained.Then,the three point bending test was carried out on the universal testing machine,and the strain of the middle position on the bottom surface was obtained by using FBG sensor.The load-strain curve of the 5 schemes was fitted,the load-strain curve and bending stiffness were obtained.It is found that the experimental results are in good agreement with the analysis results.The results show that the higher the ratio of 0 degrees,the better of the bending performance.
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