Schurink, Sofie (2026) Wave dynamics of additive manufactured ABS and PLA phononic structures at different temperatures. Research Project, Industrial Engineering and Management.
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Abstract
Elastic metamaterials can control wave propagation through engineered periodic structures and may exhibit bandgaps in which waves cannot propagate. Introducing tunability into these bandgaps enables adaptive vibration control in changing environments. This research investigates the wave dynamics of multimaterial additively manufactured metamaterial structures composed of PLA and ABS. The study explores how the reduction in the Young’s modulus of PLA near its glass transition temperature can be used to achieve thermally tunable bandgaps. First, printing parameters for reliable multimaterial fabrication were optimized. Dispersion and transmission behaviour of several unit-cell configurations were then analyzed numerically using COMSOL. Finally, wave transmission experiments were conducted using a Macro Fiber Composite actuator and a laser Doppler vibrometer while the structures were heated on a controlled print bed. The analytical results predict a significant downward shift of bandgaps when PLA transitions from the glassy to the rubbery state. Experiments confirm the overall trend but show discrepancies at lower frequencies, mainly attributed to simplified numerical modelling and damping introduced by the experimental boundary conditions. The results demonstrate the potential of multimaterial additive manufacturing for realizing thermally tunable phononic structures.
| Item Type: | Thesis (Research Project) |
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| Supervisor name: | Krushynska, A.O. and Bose, R.K. and Beniwal, S. |
| Degree programme: | Industrial Engineering and Management |
| Thesis type: | Research Project |
| Language: | English |
| Date Deposited: | 30 Apr 2026 08:46 |
| Last Modified: | 30 Apr 2026 08:46 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/37299 |
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