What question did this study set out to answer?

The research aims to evaluate how different core shapes in sandwich composites affect their mechanical performance and impact resistance.

Effect of cellular core topology on the mechanical performance of carbon/epoxy sandwich composites with 3D-printed PVA cores

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Experimental study reveals how different core shapes affect mechanical properties of composites, highlighting design implications.

The research aims to evaluate how different core shapes in sandwich composites affect their mechanical performance and impact resistance.
Examined four core topologies: honeycomb, re-entrant, grid, and full-shape.
Used three-point bending, dynamic mechanical analysis, low-velocity impact, and Charpy impact tests for assessment.
Cores were made of 3D-printed polyvinyl alcohol bonded to carbon fiber/epoxy face sheets.
Re-entrant core demonstrated the highest bending strength and elongation at break.
Full-shape core exhibited the best bending modulus and maximum peak force of 15 kN in impact tests.
Honeycomb core had the highest Charpy impact energy under high strain-rate loading conditions.

Uğur Özmen (2026) studied this question.

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