Impact modeling of foam cored sandwich plates with ductile or brittle faceplates
This paper reports numerical results of low velocity impact on open-face sandwich plates with an impactor of 2.65 kg mass hitting with 6.7 m/s velocity. The numerical simulation is done using 3D finite element models in LS-DYNA. The sandwich plates used for the present work have a core made of com...
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| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/96862 http://hdl.handle.net/10220/13061 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | This paper reports numerical results of low velocity impact on open-face sandwich plates with an impactor
of 2.65 kg mass hitting with 6.7 m/s velocity. The numerical simulation is done using 3D finite
element models in LS-DYNA. The sandwich plates used for the present work have a core made of commercial
aluminum alloy foam (Alporas) with faceplates made of either ductile aluminum (Al) or brittle
carbon fiber reinforced plastic (CFRP). Selection of suitable constitutive models and erosion criterion
for the failure analysis is investigated. A simplified analytical model for the peak load prediction under
punch-through failure mode is presented. Numerically predicted contact force versus time, energy
absorbed versus time along with the failure modes are compared with the experimental measurements
and observations. Within experimental scatter, there is a good agreement between the numerical predictions
and experimental measurements. Further more, the analytically predicted peak load values are in
excellent agreement with the experimental measurements. |
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