ETD system

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Tesi etd-01242018-103813


Thesis type
Tesi di laurea magistrale
Author
RAPPOSELLI, ALESSANDRO
URN
etd-01242018-103813
Title
In-depth numerical characterization of interlaminar damaging scenarios induced by low-velocity impact events on composite laminates
Struttura
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA AEROSPAZIALE
Supervisors
relatore Prof. Fanteria, Daniele
relatore Prof.ssa Boni, Luisa
Parole chiave
  • Compression-after-impact tests.
  • Low-velocity impact events
  • Surface-to-surface contact pairing
  • Surface-based cohesive behavior
  • Continuum Damage Mechanics
Data inizio appello
20/02/2018;
Consultabilità
Parziale
Data di rilascio
20/02/2021
Riassunto analitico
Delaminations represent a damage mechanisms of paramount interest for composite laminates addressed to aircraft applications, mainly because of their difficult detectability even during ordinary inspections implying in worst cases a dramatic residual strength breakdown.
Effective numerical simulation of delaminations in composite structures could result useful to contrast increasing costs due to experimental campaigns as well as maintenance costs.
Through the simulation of increasingly complex models, starting from simple specimen to the more demanding stiffened-panels, and the comparison with elder modeling techniques, accuracy and performances are assessed.
Therefore comparisons with low velocity impact tests and compression after impact test results on multi-directional laminates are given.
A technique to extract damage by impact simulations and to inject it in different models is developed via Python scripting.
Finally, a compression-after-impact test on a reference two-bays lower panel is simulated and related results are given.
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