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首页> 外文期刊>Composite Structures >Stiffness degradation effects on disk-shaft connection behavior of a three-dimensionally carbon-fiber-reinforced composite rotating disk
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Stiffness degradation effects on disk-shaft connection behavior of a three-dimensionally carbon-fiber-reinforced composite rotating disk

机译：刚度降低对三维碳纤维增强复合材料转盘盘轴连接性能的影响

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摘要

High-speed rotation tests of a three-dimensionally reinforced annular disk were conducted with specimens, but were suspended at a speed below that predicted for disk fracture by high-amplitude vibrations. As described herein, the vibration source was assumed to be disk stiffness degradation. This study examined the validity of this mechanism. First, laser devices were used to measure elastic displacement at the disk periphery and to estimate global disk stiffness. Second, static ring burst tests using circular ring specimens machined from composite disks were conducted to evaluate the circumferential stiffness. Compression tests were done using rectangular parallelepiped specimens for the radial stiffness. Results show that the circumferential stiffness was 67% of the prediction by the rule of mixture. The radial stiffness was 85% of that. Locally wavy carbon fiber bundles were responsible for stiffness degradation. Stiffness degradation effects on the shaft-disk connection were specifically examined based on those results.
机译：用标本对三维增强环形圆盘进行了高速旋转测试，但悬挂速度低于通过高振幅振动预测的圆盘破裂的速度。如本文所述，假定振动源是盘刚度下降。这项研究检查了这种机制的有效性。首先，使用激光设备测量磁盘外围的弹性位移并估算磁盘整体刚度。其次，使用由复合圆盘加工而成的圆环试样进行静态环爆测试，以评估圆周刚度。使用长方体样品进行径向刚度压缩试验。结果表明，圆周刚度为混合规则预测值的67％。径向刚度是其的85％。局部波浪状的碳纤维束是造成刚度下降的原因。基于这些结果，专门检查了对轴-盘连接的刚度降低影响。

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