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Quasi-Static Compression and Deformation Behavior of Additively Manufactured Flexible Polymeric Lattice Structure

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Abstract

The influence of unit cell configuration and relative density on compression behavior, deformation mechanism and energy absorption capacity of body centered cubic (BCC) flexible polymeric lattice structures was experimentally investigated in this work. Three different types of BCC cell configurations i.e. uniform cell (UBCC), uniform with z-axis reinforced cell (UBCCz) and graded cell (GBCC) were additively manufactured through digital light processing 3D printing process. Quasi static compressive testing was carried out to determine the mechanical response of lattice structures and significant effect of cell architecture and relative density on compression and strength properties were observed. The experimental results show that irrespective of lattice type the elastic modulus and collapse strength of each lattice increases with increasing relative density. However, the modulus and strength for UBCCz is higher than other two configurations due to additional vertical strut which add extra stiffening in loading direction. UBCCz lattice also showed high energy absorption capacity followed by UBCC and GBCC lattice. It was also determined that for any fixed relative density, different lattice configurations show different stress-strain behavior and deformation modes due to unique unit cell construction. The non-graded lattice shows a uniform overall deformation while gradient lattice shows layer by layer collapse. The work proposed that lattice relative density and cell configuration can be steered to improve the overall stiffness and strength of flexible lattice structures in energy absorption applications.

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The raw/processed data required to reproduce these findings cannot be shared at this time due to legal or ethical reasons. However, the same can be provided to desirous on demand through email after publication of the submitted manuscript.

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Acknowledgments

The work is supported by Pakistan Science Foundation (PSF) under PSF-NSFC joint research program (PSF/NSFC-II/Eng/P-COMSATS-Wah-05). The technical assistance of Dr. Muhammad Shahid (SCME & SMME, NUST) and Dr. Mirza Jamil Ahmed (DMME, PIEAS) in experimental work is highly appreciated.

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Authors and Affiliations

  1. Department of Mechanical Engineering, COMSATS University Islamabad, Wah Campus, Pakistan

    Uzair Ahmed Dar, Muhammad Abid, Muhammad Bilal Nutkani & Abuzar Jamil

  2. School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China

    Uzair Ahmed Dar

  3. School of Aeronautics, Northwestern Polytechnical University, Xi’an, China

    Haris Hameed Mian & Muhammad Zakir Sheikh

  4. Interdisciplinary Research Center (IRC), COMSATS University Islamabad, Wah Campus, Pakistan

    Muhammad Abid

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  1. Uzair Ahmed Dar
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  4. Muhammad Bilal Nutkani
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Correspondence to Uzair Ahmed Dar.

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Dar, U.A., Mian, H.H., Abid, M. et al. Quasi-Static Compression and Deformation Behavior of Additively Manufactured Flexible Polymeric Lattice Structure. J. of Materi Eng and Perform 31, 3107–3119 (2022). https://doi.org/10.1007/s11665-021-06419-3

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  • DOI: https://doi.org/10.1007/s11665-021-06419-3

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