中文摘要：

针对透镜式薄壁纤维增强聚合物（CFRP）管伸展臂在截面设计中需确定压扁力的问题,选取两种不同截面、长度、铺层和材料参数的薄壁CFRP管,通过试验和数值模拟分析其压扁过程中的压扁力和截面变化特征。压扁过程中,假设截面不存在局部接触变形,且是线性等曲率变化,建立压扁力近似算法1;假设给出截面局部接触变形函数,建立压扁力近似算法2。综合试验、数值模拟与两种近似算法的结果,发现压扁过程中压扁力与截面变形均表现出较强的非线性特性,可用近似算法2估算压扁力。

英文摘要：

The flattening force is studied for the design of the thin-walled lenticular carbon fiber reinforced polymer （CFRP） booms cross-section. Two thin-walled lenticular CFRP booms with different cross sections, lengths, layers and material parameters are selected. Their flattening force and deformation characteristics are analyzed by the experiments and numerical simulations. One approximation algorithm for the flattening force is established by assuming the nonexistence of the local contact deformation, and the cross-section is linearly deformed with equal curvature; the other is established by assuming the function of the partial contact deformation. Through analyzing the results of the experiments, numerical simulations and approximation algorithms, it is found that the flattening force and the cross-section show strong non-linear characteristics during the flattening process, and the approximation algorithm 2 can be used to estimate the flattening force.