Effects of Slit Edge Notches on Mechanical Properties of 3D-Printed PA12 Nylon Kirigami Specimens

Kirigami structures, a Japanese paper-cutting art form, has been widely adopted in engineering design, including robotics, biomedicine, energy harvesting, and sensing. This study investigated the effects of slit edge notches on the mechanical properties, particularly the tensile stiffness, of 3D-pri...

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Bibliographic Details
Published in:Polymers 2023-07, Vol.15 (14), p.3082
Main Authors: Shu, Jing, Wang, Junming, Li, Zheng, Tong, Kai-Yu Raymond
Format: Article
Language:English
Subjects:
3-D printers
3D printing
Additive manufacturing
Analysis
Automation
Deformation
Design
Design engineering
Energy absorption
Energy harvesting
Finite element method
Investigations
Manufacturing engineering
Mathematical analysis
Mechanical properties
Notches
Nylon
Optimization
Robotics
Stiffness
Stress concentration
Three dimensional printing
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Summary:Kirigami structures, a Japanese paper-cutting art form, has been widely adopted in engineering design, including robotics, biomedicine, energy harvesting, and sensing. This study investigated the effects of slit edge notches on the mechanical properties, particularly the tensile stiffness, of 3D-printed PA12 nylon kirigami specimens. Thirty-five samples were designed with various notch sizes and shapes and printed using a commercial 3D printer with multi-jet fusion (MJF) technique. Finite element analysis (FEA) was employed to determine the mechanical properties of the samples computationally. The results showed that the stiffness of the kirigami samples is positively correlated with the number of edges in the notch shape and quadratically negatively correlated with the notch area of the samples. The mathematical relationship between the stretching tensile stiffness of the samples and their notch area was established and explained from an energy perspective. The relationship established in this study can help fine-tune the stiffness of kirigami-inspired structures without altering the primary parameters of kirigami samples. With the rapid fabrication method (e.g., 3D printing technique), the kirigami samples with suitable mechanical properties can be potentially applied to planar springs for hinge structures or energy-absorbing/harvesting structures. These findings will provide valuable insights into the development and optimization of kirigami-inspired structures for various applications in the future.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym15143082