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Article
Chemistry, Multidisciplinary
Dong Wang et al.
Summary: Lattice metamaterials constructed by curved microstructures exhibit large stretchability and are promising in soft electronics and soft robotics. Fractal structures are particularly efficient in improving stretchability as it shows multiple-order uncurling. However, the development of fractal metamaterials is hindered by hierarchical structures and large deformations. In this study, a design framework combining experiments, hierarchical theoretical models, and finite element simulations is developed to program the mechanical behaviors of fractal metamaterials. For 3D printing, a digital design tool is developed to visualize the structure and automatically generate the manufacturing representations. Results show that large stretchability, bionic stress-strain curve matching, and imperfection insensitivity can be programmed by tuning the geometric parameters. An integrated device of an electromyogram sensor embedded in an imperfection-insensitive fractal metamaterial that matches the J-shaped stress-strain curve of human skin is demonstrated. Light-emitting diode devices based on fractal metamaterial with shape reconfiguration are also presented. This study paves a new way to realize multifunctional soft devices using fractal metamaterials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
L. I. Farfan-Cabrera et al.
Summary: This article presents a simple, suitable, and reliable procedure for determining the viscoelastic Poisson's ratio of elastomers using digital image correlation and simple creep strain measurements. Results from testing silicone rubber showed significant stress and temperature dependency of the viscoelastic Poisson's ratio.
EXPERIMENTAL MECHANICS
(2022)
Article
Engineering, Civil
Marco Viccica et al.
Summary: This study investigates the mechanical properties of a 3D Greek Cross fractal produced using selective laser sintering (SLS). The results show that the structure has an energy absorption effect up to 77% higher than traditional foam. However, process defects significantly reduce the mechanical performance of the structure for features smaller than 1 mm.
THIN-WALLED STRUCTURES
(2022)
Review
Engineering, Aerospace
Jihong Zhu et al.
Summary: The integration of topology optimization and additive manufacturing shows promising application prospects in modern manufacturing, with significant progress in multi-scale or hierarchical structural optimization design and topology optimization considering additive manufacturing constraints.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Article
Materials Science, Multidisciplinary
Brijesh Kushwaha et al.
Summary: Hierarchical structures such as the Menger sponge exhibit remarkable mechanical properties with lower effective density, as studied through experiments and simulations. The different cavity shapes in the structure are analyzed for damage initiation under compressive loading, providing insight into the unique properties of hierarchical architecture in regulating mechanical properties. Acoustic investigation indicates that the Menger sponge is a better absorber in the low-frequency regime compared to commercial sponge materials.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Multidisciplinary Sciences
Yifan Wang et al.
Summary: The study presents a structured fabric with tunable bending modulus made up of three-dimensional particles arranged into layered chain mails. When pressure is applied at their boundaries, the particles interlock and jam the chain mails, resulting in a dramatic increase in bending resistance. This property is due to the high tensile resistance of the interlocking particles, providing potential for lightweight, tunable and adaptive fabrics for various applications.
Article
Materials Science, Characterization & Testing
Juan Benito Pascual-Francisco et al.
Article
Engineering, Multidisciplinary
Yunfeng Luo et al.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2020)
Review
Automation & Control Systems
Aamer Nazir et al.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2019)
Review
Physics, Applied
Muamer Kadic et al.
NATURE REVIEWS PHYSICS
(2019)
Article
Physics, Multidisciplinary
Alexander S. Balankin
Article
Engineering, Manufacturing
Sung Yun Jun et al.
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
(2017)
Article
Business
Mohsen Attaran
Article
Physics, Multidisciplinary
Alexander S. Balankin et al.
Review
Engineering, Multidisciplinary
Bing Pan et al.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2009)
