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Triply Periodic Minimal Surface (TPMSTriply Periodic Minimal Surface (TPMS)) lattice structures are regarded as leading candidates for protective structures owing to their excellent energy absorptionEnergy absorption properties and unique geometry with a greater surface area. Functionally graded structures have showcased enhanced energy absorptionEnergy absorption performance as opposed to their uniform counterparts. This study investigates the influence of different functional grading configurations achieved through density variation, on the energy absorptionEnergy absorption performance of TPMSTriply Periodic Minimal Surface (TPMS) structures under quasi-static compression. Gyroid and Diamond TPMSTriply Periodic Minimal Surface (TPMS) geometries including uniform, radially graded and longitudinally graded configurations were additively manufactured using the impact-resistant material Acrylonitrile Butadiene Styrene (ABS). Each grading configuration was evaluated by comparing the force–displacement response and corresponding energy absorptionEnergy absorption properties including Peak Crushing Force (PCF), Mean Crushing Force (MCF), Crush Force Efficiency (CFE), Total Energy AbsorptionEnergy absorption (EA) and Specific Energy AbsorptionEnergy absorption (SEA). The results show that the Negative Radial Gradation (NRG), which bio-mimics human bone, is a top-performing functional grading configuration considering the overall energy absorptionEnergy absorption capability.

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Influence of Functional-Gradation on the Energy Absorption Performance of Triply Periodic Minimal Surface (TPMS) Lattice Structures

  • 会议论文

  • 发表日期：

    2025年

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  • Yehan S. Rajapakse,
  • Juan P. Escobedo-Diaz,
  • Damith Mohotti,
  • Jianshen Wang,
  • Hongxu Wang,
  • Paul J. Hazell

摘要

Triply Periodic Minimal Surface (TPMSTriply Periodic Minimal Surface (TPMS)) lattice structures are regarded as leading candidates for protective structures owing to their excellent energy absorptionEnergy absorption properties and unique geometry with a greater surface area. Functionally graded structures have showcased enhanced energy absorptionEnergy absorption performance as opposed to their uniform counterparts. This study investigates the influence of different functional grading configurations achieved through density variation, on the energy absorptionEnergy absorption performance of TPMSTriply Periodic Minimal Surface (TPMS) structures under quasi-static compression. Gyroid and Diamond TPMSTriply Periodic Minimal Surface (TPMS) geometries including uniform, radially graded and longitudinally graded configurations were additively manufactured using the impact-resistant material Acrylonitrile Butadiene Styrene (ABS). Each grading configuration was evaluated by comparing the force–displacement response and corresponding energy absorptionEnergy absorption properties including Peak Crushing Force (PCF), Mean Crushing Force (MCF), Crush Force Efficiency (CFE), Total Energy AbsorptionEnergy absorption (EA) and Specific Energy AbsorptionEnergy absorption (SEA). The results show that the Negative Radial Gradation (NRG), which bio-mimics human bone, is a top-performing functional grading configuration considering the overall energy absorptionEnergy absorption capability.