Experimental study on impact damage and residual strength of composite tail drive shaft for helicopter
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摘要:
为研究不同制备工艺和弹击工况对直升机尾传动轴弹击损伤及剩余强度的影响,分别制备了编织型和缠绕型复合材料尾传动轴,基于轻气炮装置和扭转试验机开展了典型工况下的弹击试验和扭转试验。研究结果表明:相比于子弹入射角度,子弹偏移量对尾传动轴损伤程度的影响更为显著;从制备工艺的角度来看,相比于缠绕型尾传动轴,编织型复合材料尾传动轴表现出更优异的抗弹击损伤性能;从失效模式的角度来看,无损和贯穿式弹击工况下复合材料尾传动轴在扭转试验中的失效模式表现为瞬间断裂,而切边式弹击工况下复合材料尾传动轴在扭转试验中的失效模式表现为渐进断裂。
Abstract:To investigate the effects of different manufacturing processes and impact conditions on the impact damage and residual strength of helicopter tail drive shafts, braided and filament-wound composite tail drive shafts were fabricated, and impact and torsion tests under typical conditions were conducted using a light gas gun device and a torsion testing machine. The results showed that, compared with the bullet's incident angle, the bullet's offset had a more significant effect on the damage degree of the tail drive shaft. From the perspective of manufacturing processes, the braided composite tail drive shaft exhibited superior impact damage resistance compared with the filament-wound tail drive shaft. From the perspective of failure modes, under non-damaging and through-penetration impact conditions, the failure mode of the composite tail drive shaft in torsion tests was characterized by instantaneous fracture, whereas under edge-cutting impact conditions, the failure mode in torsion tests was characterized by progressive fracture.
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Key words:
- helicopter tail drive shaft /
- composite material /
- impact test /
- torsion test /
- impact-resistant design
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图 12 典型工况下$ [\pm 1{4}{\text{°}}/\pm 4{5}{\text{°}}/\pm 4{5}{\text{°}}/\pm 1{4}{\text{°}}{]}_{\mathrm{s}} $缠绕型复合材料受损尾传动轴的扭转破坏曲线
Figure 12. Torsional failure curve of damaged tail drive shaft made of $ [\pm 1{4}{\text{°}}/\pm 4{5}{\text{°}}/\pm 4{5}{\text{°}}/\pm 1{4}{\text{°}}{]}_{\mathrm{s}} $ filament-wound composite under typical conditions
图 16 $ [\pm 1{4}{\text{°}}/\pm 4{5}{\text{°}}/\pm 4{5}{\text{°}}/\pm 1{4}{\text{°}}{]}_{\mathrm{s}} $缠绕型复合材料尾传动轴和$ [{0}{\text{°}}/\pm 6{0}{\text{°}}{]}_{5} $编织型复合材料尾传动轴在不同弹击工况下的极限承载扭矩
Figure 16. Ultimate torsional load capacity of $ [\pm 1{4}{\text{°}}/\pm 4{5}{\text{°}}/\pm 4{5}{\text{°}}/\pm 1{4}{\text{°}}{]}_{\mathrm{s}} $ filament-wound composite tail drive shaft and $ [{0}{\text{°}}/\pm 6{0}{\text{°}}{]}_{5} $ braided composite tail drive shaft under different impact conditions
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