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<p>Auxetic materials, distinguished by their negative Poisson’s ratio, exhibit unconventional deformation behavior, expanding laterally under tension and contracting under compression. This study explores Auxetic U-shaped Cylindrical Structures (AUCS), fabricated from ABS resin via digital light processing (DLP) 3D printing, to evaluate the influence of thickness on their compressive performance. Experimental testing and finite element analysis were conducted for five thicknesses ranging from 0.8 to 1.2&#xa0;mm. Results show that increasing thickness leads to a pronounced improvement in structural response: stiffness rises from 808 N/mm at 0.8&#xa0;mm thickness to 1581&#xa0;N/mm at 1.2&#xa0;mm (a ~ 95% increase), and energy absorption increases from 260&#xa0;mJ to 380&#xa0;mJ (approximately 46%). Thicker AUCS exhibit higher strength and energy dissipation, whereas thinner structures provide more uniform strain and stress distributions, reducing localized failure risks. These findings establish a clear structure–property relationship and provide guidance for optimization of auxetic cylindrical components through advanced manufacturing and computational modeling.</p>

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Optimizing Auxetic U-Shaped Cylindrical Structures in Vehicle Motor via Digital Light Processing 3D Printing: A Comprehensive Analysis of Thickness Effects

  • 期刊论文

  • 发表日期：

    2026年6月18日

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  • Yi Zhang

摘要

Auxetic materials, distinguished by their negative Poisson’s ratio, exhibit unconventional deformation behavior, expanding laterally under tension and contracting under compression. This study explores Auxetic U-shaped Cylindrical Structures (AUCS), fabricated from ABS resin via digital light processing (DLP) 3D printing, to evaluate the influence of thickness on their compressive performance. Experimental testing and finite element analysis were conducted for five thicknesses ranging from 0.8 to 1.2 mm. Results show that increasing thickness leads to a pronounced improvement in structural response: stiffness rises from 808 N/mm at 0.8 mm thickness to 1581 N/mm at 1.2 mm (a ~ 95% increase), and energy absorption increases from 260 mJ to 380 mJ (approximately 46%). Thicker AUCS exhibit higher strength and energy dissipation, whereas thinner structures provide more uniform strain and stress distributions, reducing localized failure risks. These findings establish a clear structure–property relationship and provide guidance for optimization of auxetic cylindrical components through advanced manufacturing and computational modeling.