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<p>Lattice structures in engineering, created through additive manufacturing (AM), offer lightweight design, high strength-to-weight ratio, excellent energy absorption, and efficient material use. However, their mechanical behavior remains poorly understood, limiting widespread adoption. The present work investigates the mechanical properties of lattice IN718, focusing on time-dependent behavior and stress evolution under diverse loading conditions. Quasistatic compression tests at ambient and elevated temperatures along with Split-Hopkinson pressure bar tests have been conducted to observe the lattice response and develop constitutive models. The findings evaluate the modulus of elasticity, yield strength, plateau stress, and toughness to understand the mesoscale deformation mechanics of metallic lattice components for their optimal use in engineering applications.</p>

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Investigations into the mesoscale mechanical responses of additively manufactured octahedron IN718 lattice structures

  • 期刊论文

  • 发表日期：

    2025年6月14日

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  • Navneet Dwivedi,
  • Sarvesh Kumar Mishra,
  • Luis Norberto López de Lacalle

摘要

Lattice structures in engineering, created through additive manufacturing (AM), offer lightweight design, high strength-to-weight ratio, excellent energy absorption, and efficient material use. However, their mechanical behavior remains poorly understood, limiting widespread adoption. The present work investigates the mechanical properties of lattice IN718, focusing on time-dependent behavior and stress evolution under diverse loading conditions. Quasistatic compression tests at ambient and elevated temperatures along with Split-Hopkinson pressure bar tests have been conducted to observe the lattice response and develop constitutive models. The findings evaluate the modulus of elasticity, yield strength, plateau stress, and toughness to understand the mesoscale deformation mechanics of metallic lattice components for their optimal use in engineering applications.