层合复合材料簧片单元弯曲力学性能

为提高空间可展铰链的运行稳定性和可靠性,减轻结构质量,研究了碳纤维增强层合复合材料簧片单元的弯曲性能.以衡量簧片驱动能力的应变能、稳态弯矩以及簧片自锁能力的屈曲临界弯矩为力学性能指标.分析了可折叠自展开的簧片单元在弯曲折叠过程中,复合材料铺层角度、铺层厚度和簧片截面半径对各性能指标的影响.研究结果表明:随着复合材料铺层角度的增加,簧片驱动能力增强,但其自锁能力基本不变;随着复合材料铺层厚度和截面半径的增加,簧片的驱动能力和自锁能力均增强;随着材料铺层角度、截面半径的增加,簧片的横截面出现截面变形现象且伴随微小回弹.研究结果对于空间簧片式铰链驱动性能的改进具有一定的参考价值.

Bending Mechanical Properties of Laminated Composite Tape-Spring Unit

To improve the operation stability and reliability and reduce the structural weight, the flexural properties of tape spring made of laminated composite material were studied. The mechanical properties including driving ability and self-locking ability of tape spring represented strain energy,steady moment and represented buckling critical moment were investigated. The influences of composite ply angle, layer thickness and radius of cross section of tape spring on mechanical properties were researched in the bending and folding process. Results show that the driving ability of tape spring increases with self-locking ability steady as the composite ply angle grows; the composite ply angle and radius of cross section lead to improvement of driving and self-locking ability;and the phenomena of deformation of cross section and of minute rebound has risen due to growth of composite ply angle and radius of cross section. This research has important reference value for improving the driving performance of space tape-spring hinge.