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Related Experiment Video

Updated: Oct 11, 2025

Core/shell Printing Scaffolds For Tissue Engineering Of Tubular Structures
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Multidimensional Mechanics of Three-Dimensional Printed and Micro-Architectured Scaffolds.

Pooya Niksiar1, Zhaoxu Meng2, Michael M Porter2

  • 1Department of Mechanical Engineering, The Citadel, Charleston, SC 29409, USA.

Journal of Applied Mechanics
|November 29, 2021
PubMed
Summary

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Micro-architectural features like wall thickness and domain number in 3D-printed scaffolds significantly tune mechanical properties. Transverse bridges enhance both longitudinal and transverse strength by improving buckling resistance.

Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Additive Manufacturing

Background:

  • Porous material mechanics are dictated by micro-architecture.
  • Freeze casting is a common fabrication method for porous scaffolds.
  • Key micro-architectural features include wall thickness, domain number, and transverse bridges.

Purpose of the Study:

  • To investigate the impact of specific micro-architectural characteristics on scaffold mechanics.
  • To analyze anisotropic compressive properties in three orthogonal directions.
  • To establish structure-property relationships in 3D-printed porous scaffolds.

Main Methods:

  • Utilized additive manufacturing (3D printing) to fabricate precisely designed cubic scaffolds.
  • Varied wall thickness, number of domains, and presence of transverse bridges individually.
Keywords:
Multidimensional mechanicsadditive manufacturinganisotropic propertiesporous scaffold designradar charts

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  • Assessed mechanical properties (strength, toughness, resilience, stiffness, strain to failure) in longitudinal and transverse directions.
  • Employed radar charts for multidimensional mechanical property comparison.

    • Main Results:

    • Micro-architectural characteristics effectively tune multidimensional mechanical properties.
    • Buckling resistance is influenced by all three studied structural characteristics.
    • Increased domain number enhances toughness across all directions.
    • Thicker walls improve mechanical properties but reduce pore size.
    • Transverse bridges increase transverse strength and longitudinal strength via enhanced buckling resistance.

    Conclusions:

    • Additive manufacturing allows for controlled fabrication of micro-architectured scaffolds.
    • Tailoring micro-architecture provides a pathway to optimize mechanical performance for specific applications.
    • Understanding these structure-property relationships is crucial for designing advanced porous materials.