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A methodology for the design, fabrication and testing of axially graded polymeric structures with tailored vibration characteristics
Polymer Testing ( IF 5.1 ) Pub Date : 2021-01-07 , DOI: 10.1016/j.polymertesting.2021.107054
Mariona Heras Segura , Kumar Singh , Fazeel Khan

Machinery subject to internal and/or external mechanical excitations typically require careful control or avoidance of undesirable vibration behavior to meet operational constraints. To address this difficulty, the design, fabrication and testing of multi-polymer axially graded (segmented) structures fabricated through 3D printing was performed. Experiments were conducted on axially graded beams composed of four different polymers in a linear spatial arrangement. The ability to combine multiple materials through additive manufacturing affords the ability to create graded structures that can meet specific performance metrics: higher damping at the desired vibration modes and greater modal separation has been successfully demonstrated. The significance of this work is vested in the fact that the proposed technique can enable the development of tuned structures which can deliver desired spectral characteristics. Furthermore, strength, stability (e.g. buckling) as well as vibrational targets in the design of machinery can be met simultaneously using axial grading of materials.



中文翻译:

设计,制造和测试具有定制振动特性的轴向渐变聚合物结构的方法

受到内部和/或外部机械激励的机械通常需要仔细控制或避免不良的振动行为,以满足操作限制。为了解决该困难,进行了通过3D打印制造的轴向轴向分级的多聚合物结构的设计,制造和测试。实验是在由线性空间排列的四种不同聚合物组成的轴向渐变梁上进行的。通过增材制造将多种材料结合在一起的能力提供了创建满足特定性能指标的渐变结构的能力:成功地证明了所需振动模式下的更高阻尼和更大的模态分离。这项工作的意义在于以下事实:所提出的技术可以实现可提供所需光谱特性的调谐结构的开发。此外,使用轴向分级材料可以同时满足机械设计中的强度,稳定性(例如屈曲)和振动目标。

更新日期:2021-01-13
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