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<p>This study investigates the compression behavior of additively manufactured (AM) parts via material extrusion (MEX), focusing on the effects of loading direction (LD) and structural configuration (shelled, SH vs. non-shelled, NS) on their mechanical performance. The results reveal a pronounced anisotropic response, with significant differences in stiffness, strength, and energy absorption depending on the LD. Among the tested LDs, the D1 LD demonstrates the highest mechanical performance, while the D2 and D3 LDs show inferior properties. SH parts outperform NS ones in terms of absolute strength, stiffness, and energy absorption, particularly in the D1 and D3 LDs. However, when normalized by density, NS parts exhibit higher specific strength and stiffness, indicating their suitability for weight-sensitive applications. The study highlights that LD plays a crucial role in defining the structural response of MEX-printed components, with anisotropy significantly influencing deformation behavior and failure mechanisms. These findings provide critical insights for optimizing 3D-printed structures, particularly in applications where mechanical efficiency and lightweight design are essential. The results suggest that SH structures are preferable for impact absorption, while NS structures are ideal for high specific stiffness and strength. By enhancing the understanding of anisotropic compression behavior, this research contributes to the advancement of optimized AM-printed components with improved structural performance.</p>

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New insights into tailoring anisotropy-driven shell design for enhanced compression performance in additively manufactured structures

  • 期刊论文

  • 发表日期：

    2025年10月13日

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  • Emanoil Linul

摘要

This study investigates the compression behavior of additively manufactured (AM) parts via material extrusion (MEX), focusing on the effects of loading direction (LD) and structural configuration (shelled, SH vs. non-shelled, NS) on their mechanical performance. The results reveal a pronounced anisotropic response, with significant differences in stiffness, strength, and energy absorption depending on the LD. Among the tested LDs, the D1 LD demonstrates the highest mechanical performance, while the D2 and D3 LDs show inferior properties. SH parts outperform NS ones in terms of absolute strength, stiffness, and energy absorption, particularly in the D1 and D3 LDs. However, when normalized by density, NS parts exhibit higher specific strength and stiffness, indicating their suitability for weight-sensitive applications. The study highlights that LD plays a crucial role in defining the structural response of MEX-printed components, with anisotropy significantly influencing deformation behavior and failure mechanisms. These findings provide critical insights for optimizing 3D-printed structures, particularly in applications where mechanical efficiency and lightweight design are essential. The results suggest that SH structures are preferable for impact absorption, while NS structures are ideal for high specific stiffness and strength. By enhancing the understanding of anisotropic compression behavior, this research contributes to the advancement of optimized AM-printed components with improved structural performance.