Effects of Impact Damage on the Energy Absorption Capabilities of Composite Materials

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Issue Date
2023-09
Embargo End Date
Authors
Bhasin, Akhil
Keshavanarayana, Suresh R.
Maichan, Tanat
Gomez, Luis
Olivares, Gerardo
Advisor
Citation

Bhasin, A., Keshavanarayana, S.R., Maichan, T., Gomez, L., Olivares, G., "Effects of Impact Damage on the Energy Absorption Capabilities of Composite Materials," 38th Technical Conference of the American Society for Composites, Boston, 2023, pp. 729 - 741.

Abstract

In the current investigation, the effects of in-service impact damage on the energy absorption capabilities, and damage evolution of two different geometries, corrugated beams, and c-channel stanchions, have been presented. Both the energy absorber geometries were manufactured using two composite material systems, Hexcel IM7/8552 and Hexcel AS4 PW/8552. Two different stacking sequences evaluated were: [90o/0o]2S and [45o/90o/-45o/0o]s. The pristine specimens were secured in a nonstandard fixture and impacted at the center using a drop tower [1]. The specimens were impacted at different energy levels to introduce varying levels of damage. Post-damage introduction, compression tests were performed at 1 in/s using a high-speed servo-hydraulic test frame. All the tests were supported with high-speed Digital Image Correlation (DIC) to obtain damage evolution and surface strains. A comparison of the energy absorption capabilities and damage modes between the pristine specimens and specimens with impact damage has been reported.

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38th Technical Conference of the American Society for Composites, ASC 2023, September 18, 2023 - September 20, 2023
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