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Dynamic Analysis and Vibration Control of Additively Manufactured Thin-Walled Polylactic Acid Polymer (PLAP) and PLAP
Ali Raza1, Magdalena Mieloszyk2, Rūta Rimašauskienė1
1Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentų Str. 56, LT-51424 Kaunas, Lithuania.
Materials (Basel, Switzerland)
|November 27, 2024
Summary
This study numerically investigated vibration control in additively manufactured beams using macro fiber composites. Results show effective vibration reduction across different material configurations, aligning with experimental data.
Area of Science:
- Materials Science
- Mechanical Engineering
- Structural Dynamics
Background:
- Vibrations in thin-walled structures can compromise structural integrity.
- Effective vibration control is crucial for ensuring the reliability of additively manufactured components.
Purpose of the Study:
- To numerically investigate the dynamic behavior and vibration control of additively manufactured (AM) beam structures.
- To validate numerical findings with experimental results.
Main Methods:
- Finite element modeling (FEM) of AM beams integrated with macro fiber composites (MFCs).
- Modal frequency analysis and frequency response analysis (FRA).
- THz spectroscopy for material defect identification.
Main Results:
- Numerical modal frequencies showed discrepancies within 1.5% for the 1st mode and 10% for subsequent modes compared to experimental data.
- Consistent trends in vibration amplitude behavior were observed between numerical and experimental FRA.
- MFC application reduced vibration amplitudes to approximately ±19 µm (PLAP), ±16 µm (SCFR|PLAP), and ±13 µm (CCFR|PLAP).
Conclusions:
- Numerical simulations provide valuable insights into vibration control trends for AM beam structures.
- The study demonstrates the efficacy of MFCs for vibration mitigation in these structures.
- Findings support the use of numerical methods for predicting and optimizing vibration control in AM components.
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