Effect of design parameters on auxetic behavior and stiffness of additively manufactured 316L stainless steel

Khedr, Mahmoud; Elshokrofy, Hassan; Pokka, Aki-Petteri; Hamada, Atef; Jaskari, Matias; Mustakangas, Aappo; Järvenpää, Antti; Ibrahim, Abdelkader; Elsamanty, Mahmoud

doi:10.1016/j.jmrt.2024.05.197

Journal of Materials Research and Technology

2024

DOI: 10.1016/j.jmrt.2024.05.197

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Effect of design parameters on auxetic behavior and stiffness of additively manufactured 316L stainless steel

Mahmoud Khedr,

Hassan Elshokrofy,

Aki-Petteri Pokka

et al.

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Cited by 5 publications

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Mechanical Response of Four‐Star‐Honeycomb Hybrid Metamaterial Under In‐Plane Loading

Mwema,

Wambua,

Igwe

et al. 2024

Adv Eng Mater

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This paper focuses on designing and producing a hybrid metamaterial with a relative density of at least 0.59 using additive manufacturing. The metamaterial consists of layers of four‐star (A) and honeycomb (B)‐shaped unit cells. Three configurations (ABA, AABAA, and AABB) were 3D printed at various layer heights (0.06, 0.10, 0.15, and 0.20 mm). The quality of the printed samples depends on the layer height, with lower heights producing fewer defects and better geometric accuracy. In‐plane compression tests were conducted to evaluate the mechanical properties. The stress‐strain curves exhibited linear plateau and densification regions, varying across designs and layer heights. The AABB structure, printed at 0.1 and 0.06‐mm layer heights, showed the highest peak stress, while the ABA structure exhibited the lowest stress. The AABB structure, with a density of 742 kg/m³, demonstrated the potential for large deformation applications. Visual examination revealed distinct distortion patterns in the unit cells during loading, with the honeycomb cells in the ABA structure experiencing the most significant shape distortion. Overall, this research highlights the potential of hybrid metamaterials for lightweight and large deformation applications. The optimal design and manufacturing parameters can be tailored to achieve specific mechanical properties and performance requirements.

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Mechanical Response of Four‐Star‐Honeycomb Hybrid Metamaterial Under In‐Plane Loading

Mwema,

Wambua,

Igwe

et al. 2024

Adv Eng Mater

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Effect of building orientation on weld characteristics of additively manufactured 316L stainless steel: Microstructure and mechanical properties

Khedr,

Elsayed,

Jaskari

et al. 2024

Materials Science and Engineering: A

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Supportless lattice structure of 316L stainless steel fabricated by material extrusion additive manufacturing: Effect of relative density on physical, microstructural and mechanical behaviour

Parsompech,

Suwanpreecha,

Noraphaiphipaksa

et al. 2024

Materials Science and Engineering: A

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Effect of design parameters on auxetic behavior and stiffness of additively manufactured 316L stainless steel

Cited by 5 publications

References 37 publications

Mechanical Response of Four‐Star‐Honeycomb Hybrid Metamaterial Under In‐Plane Loading

Mechanical Response of Four‐Star‐Honeycomb Hybrid Metamaterial Under In‐Plane Loading

Effect of building orientation on weld characteristics of additively manufactured 316L stainless steel: Microstructure and mechanical properties

Supportless lattice structure of 316L stainless steel fabricated by material extrusion additive manufacturing: Effect of relative density on physical, microstructural and mechanical behaviour

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