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Characterization and comparison of low energy impact damage for composite plates
Low and medium energy impact on composite laminates were studied to relate mechanisms of response and damage to impact energies. A fully-instrumented drop-weight impact apparatus was used to study the response and damage of graphite/epoxy, graphite/PEEK, and Kevlar/epoxy plates. The plates were impacted through a range of velocities to characterize the behavior of the different materials. The graphite samples exhibited more localized damage behavior, particularly at higher impact energies. C-Scans and X-ray radiographs were taken of the graphite samples to quantify the extent of damage. The results showed that matrix cracking and delamination damage coincided for the graphite samples, and that the PEEK matrix resisted cracking better than the epoxy. The graphite samples underwent penetration damage at higher impact energies. The Kevlar samples were extensively delamination with no signs of penetration. It was concluded that penetration damage could be distinguished from matrix cracking and delamination through monitoring the impactor motion and the contact force during impact.
Characterization and comparison of low energy impact damage for composite plates
Low and medium energy impact on composite laminates were studied to relate mechanisms of response and damage to impact energies. A fully-instrumented drop-weight impact apparatus was used to study the response and damage of graphite/epoxy, graphite/PEEK, and Kevlar/epoxy plates. The plates were impacted through a range of velocities to characterize the behavior of the different materials. The graphite samples exhibited more localized damage behavior, particularly at higher impact energies. C-Scans and X-ray radiographs were taken of the graphite samples to quantify the extent of damage. The results showed that matrix cracking and delamination damage coincided for the graphite samples, and that the PEEK matrix resisted cracking better than the epoxy. The graphite samples underwent penetration damage at higher impact energies. The Kevlar samples were extensively delamination with no signs of penetration. It was concluded that penetration damage could be distinguished from matrix cracking and delamination through monitoring the impactor motion and the contact force during impact.
Characterization and comparison of low energy impact damage for composite plates
Kennzeichnung und Vergleich von energiearmen Stoßbeschädigungen an Verbundplatten
Montemurro, M.P. (author) / Hansen, J.S. (author)
1995
7 Seiten, 9 Bilder, 2 Tabellen, 20 Quellen
Conference paper
English
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