Low Velocity Impact of Bistable Laminated CFRP Composites

Laminated carbon fiber reinforced polymer (CFRP) composites have gained popularity in engineering applications due to their lightweight and strong in-plane mechanical properties. This material, however, performs poorly with respect to out-of-plane impact resistance. The objective of this research wa...

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Bibliographic Details
Published in:Journal of dynamic behavior of materials 2019-12, Vol.5 (4), p.432-443
Main Authors: Abarotin, C. A., Myers, O. J., Pataky, G. J.
Format: Article
Language:English
Subjects:
Acceleration
Accelerometers
Bistability
Carbon fiber reinforced plastics
Chemistry and Materials Science
Dynamic response
Energy absorption
Fiber composites
Fiber reinforced polymers
Impact damage
Impact resistance
Kinetic energy
Load cells
Materials Science
Mechanical properties
Metallic Materials
Polymer matrix composites
Research Paper
Solid Mechanics
Stacking sequence (composite materials)
Velocity
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Summary:Laminated carbon fiber reinforced polymer (CFRP) composites have gained popularity in engineering applications due to their lightweight and strong in-plane mechanical properties. This material, however, performs poorly with respect to out-of-plane impact resistance. The objective of this research was to investigate the effect of bistability on the low velocity impact resistance of laminated CFRP composites. Bistable composites have the ability to alternate between two different geometric equilibria through external loading, and when unloaded, do not require external forces to maintain either geometry. Laminated CFRP composite specimens of bistable, flat symmetric, and curved symmetric configurations were subjected to low velocity impacts of 20 J. The acceleration and force of each impact was recorded using an accelerometer and a load cell mounted on the impactor. The sensor data was used to analyze the dynamic response and calculate the energy absorption of each impact. Post-impact crack length measurements and damage characterization were used to conduct a damage resistance analysis. The effects of geometry, stacking sequence, and bistability of the impacted specimens were determined. The results showed that bistability improves the low velocity impact damage resistance of laminated CFRP composites through increased energy absorption and specimen kinetic energy.
ISSN:2199-7446
2199-7454
DOI:10.1007/s40870-019-00209-8