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Archivio digitale delle tesi discusse presso l’Università di Pisa

Tesi etd-05102025-073308


Tipo di tesi
Tesi di laurea magistrale
Autore
CAFFI, ATTILIO AMEDEO
URN
etd-05102025-073308
Titolo
Damping Capacity of Different Viscoelastic Lattice structures: Influence of Relative Density and Prestrain
Dipartimento
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA AEROSPAZIALE
Relatori
relatore Prof. Fanteria, Daniele
correlatore Prof. Panettieri, Enrico
correlatore Prof. Montemurro, Marco
Parole chiave
  • Additive manufacturing
  • Damping behavior
  • Lattice structures
  • Triply periodic minimal surfaces (TPMS)
  • Vibration testing
  • Viscoelastic materials
Data inizio appello
28/05/2025
Consultabilità
Non consultabile
Data di rilascio
28/05/2028
Riassunto
This thesis investigates the dynamic behavior of viscoelastic lattice structures through both numerical simulations and experimental analysis. Lattice structures are lightweight, architected materials with high strength and tunable damping capabilities, especially when combined with viscoelastic polymers. Due to the frequency-dependent stiffness and damping of these materials, predicting resonance behavior is complex and requires advanced modeling. The study begins with a benchmark case of a viscoelastic beam, followed by a comparative analysis of three lattice geometries at different relative densities. Harmonic response simulations are performed and validated against vibrometer measurements on 3D-printed samples. The influence of pre-deformation on damping behavior is also examined through compression tests and a dedicated experimental setup using a lattice sandwich structure. Results highlight how geometry, material, and prestress conditions jointly influence vibrational performance.
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