Article
Engineering, Manufacturing
Mauricio Cruz Saldivar, Eugeni L. Doubrovski, Mohammad J. Mirzaali, Amir A. Zadpoor
Summary: This paper presents a nonlinear coarse-graining approach to predict the mechanical behavior of biomimetic composites using foam-based constitutive equations. The proposed method has been validated and applied successfully to design advanced architected materials.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Multidisciplinary
Siqi Ma, Hualong Yang, Shenjian Zhao, Peigang He, Zuhua Zhang, Xiaoming Duan, Zhihua Yang, Dechang Jia, Yu Zhou
Summary: A novel approach combining 3D printing technology and Bouligand structure design was used to fabricate lightweight, high strength, and superior toughness CsfGP composites, showing outstanding mechanical properties with consistent fiber orientation distribution and sophisticated interfaces.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Automation & Control Systems
Xudong Yang, Zongzheng Wang, Bojian Zhang, Tianyu Chen, Changhong Linghu, Kunlin Wu, Guohui Wang, Hailu Wang, Yifan Wang
Summary: This study introduces a new class of robotic structures from architectured particle assemblies, which combine shape changing, stiffness variation, and self-sensing into one monolithic structure. Unlike traditional soft robots, this design utilizes geometric contacts of stiff particles to achieve multifunctionality. The study demonstrates the applications of these structures in self-sensing architectures and soft grippers.
ADVANCED INTELLIGENT SYSTEMS
(2023)
Article
Engineering, Manufacturing
Jinxing Sun, Shixiang Yu, Wade-Zhu James, Yue Wang, Hongqiao Qu, Shuai Zhao, Rui Zhang, Jinglei Yang, Jon Binner, Jiaming Bai
Summary: Geometrically complex ceramic composite components with exceptional damage tolerance can be fabricated using additive manufacturing and novel biomimetic toughening design.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Mechanical
Sudheendra Herkal, Muhammad M. Rahman, Satish Nagarajaiah, Vijay Vedhan Jayanthi Harikrishnan, Pulickel Ajayan
Summary: Schwarzites are 3D solids with negative Gaussian curvatures that possess unique mechanical properties such as high ductility and strength. The energy dissipation mechanism of Schwarzites allows for the removal of energy from dynamic systems and reduction of system response. Experimental results show that Schwarzite geometry can increase the damping ratio by almost 80% with the same material volume as a solid support. Additionally, Schwarzites exhibit vibration isolation properties.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Review
Biochemistry & Molecular Biology
Xiao-Yu He, Hai-Ming Yu, Shu Lin, Yi-Zhong Li
Summary: Osteoporosis is a severe public health concern among the elderly and postmenopausal adults, with related fractures posing a major cause of morbidity and mortality. Emerging technologies for treating osteoporosis, such as mesenchymal stem cells, exosomes, and biomimetic materials, have received increasing research attention and shown significant progress in reconstruction and repair of bones affected by osteoporosis-related fractures.
CELLULAR & MOLECULAR BIOLOGY LETTERS
(2021)
Article
Engineering, Multidisciplinary
Zhenyu Wang, Xingle Zhang, Changli Cheng, Yanjun Liu, Daopeng Qu, Pengpeng Shao, Jing Jiang, Yu Liu
Summary: By using 3D printing technique, we have developed a composite lattice structure with high toughness and strength. Strengthening and toughening zones are assembled into a layered structure. The resulting composite lattices exhibit significantly improved flexural properties and crack resistance properties, showing 400%, 83%, and 36% higher toughness, specific strength, and fracture toughness compared to solid materials, respectively. The exceptional strength and toughness of the composite lattices come from the synergetic effect of the strengthening and toughening zones, as confirmed by both experimental and theoretical analysis. These findings provide an effective strategy for fabricating epoxy-based composites with precisely controlled structures and mechanical performances.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Engineering, Mechanical
N. Menga, F. Bottiglione, G. Carbone
Summary: The paper evaluates the effectiveness of nonlinear viscoelastic damping in controlling base-excited vibrations. It investigates the robustness of nonlinear base isolation performance in controlling system response to a wide set of possible excitation spectra, showing that tuned nonlinear RLRB provides loads isolation in a wider range of excitation spectra.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Yingni Xu, Jia Liu, Wenjing Song, Qianchun Wang, Xiaomin Sun, Qi Zhao, Yongrui Huang, Haochen Li, Yuehai Peng, Jin Yuan, Baohua Ji, Li Ren
Summary: Blindness caused by corneal damage is a growing global problem, and traditional corneal materials face challenges in rapid epithelization and stable epithelium process. This study presents smooth 3D-printed convex corneal implants that promote corneal regeneration. Cell behavior on curvature is studied by separating the surfaces into four regions, revealing that cells on steeper slope gradient surfaces exhibit better organization and adhesion. In vivo transplantation of convex implants leads to improved fit and accelerated healing processes. Overall, printed convex corneal implants offer a translational strategy for corneal damage treatment.
Article
Nanoscience & Nanotechnology
Xufeng Cao, Shouhu Xuan, Shuaishuai Sun, Zhenbang Xu, Jun Li, Xinglong Gong
Summary: A 3D printing strategy based on magneto-active materials was developed to manufacture various biomimetic magnetic actuators, demonstrating continuous shape transformations imitating motion characteristics of creatures. The biomimetic actuator based on soft magneto-active materials has programmable integrated structure, rapid prototyping, remote noncontact actuation, and rapid magnetic response advantages, showing broad application prospects in soft robotics and other fields.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Biomedical
Binbin He, Jie Wang, Mengtian Xie, Miaoyi Xu, Yahan Zhang, Huijie Hao, Xiaoli Xing, William Lu, Quanhong Han, Wenguang Liu
Summary: In this study, a biomimetic epithelium/stroma bilayer implant for corneal regeneration is proposed by 3D printing technology. The printed PEGDA-GelMA hydrogels exhibit excellent mechanical properties and support cell adhesion, proliferation, and migration. The bi-layer cells-laden corneal scaffold shows efficient sealing of corneal defects and promotes re-epithelialization and stromal regeneration in a rabbit keratoplasty model.
BIOACTIVE MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Tristan Djourachkovitch, Nawfal Blal, Nahiene Hamila, Anthony Gravouil
Summary: This article introduces a data-driven multiscale optimization method for solving 3D problems under given boundary conditions, involving structural and material scales, with the aim of reducing computational costs and achieving lighter structure designs.
COMPUTERS & STRUCTURES
(2021)
Article
Polymer Science
Young Soo Yu, Chi Bum Ahn, Kuk Hui Son, Jin Woo Lee
Summary: A novel trachea scaffold with hydrogel inside and outside of the structure was developed in this study, mimicking human airway structure and movements. It showed good performance and advantages for soft tissue reconstruction of the trachea, with the gelatin hydrogel remaining well under external flow conditions.
Article
Nanoscience & Nanotechnology
Yun-Woo Lee, Hakan Ceylan, Immihan Ceren Yasa, Ugur Kilic, Metin Sitti
Summary: Integrating stimuli-responsive materials with mobile magnetic micromachines can enhance their design toolbox, enabling independently controlled new functional capabilities to be defined. This can inspire future applications of 3D- and 4D-printed multifunctional mobile microrobots for precisely targeted obstructive interventions and lab- and organ-on-a-chip manipulations.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Analytical
Haishuo Liu, Zipeng Zhang, Chenyu Wu, Kang Su, Xiaonan Kan
Summary: Superhydrophobicity, observed in natural organisms like lotus leaves and desert beetles, has inspired extensive research on biomimetic materials. Two main superhydrophobic effects have been identified: the lotus leaf effect and the rose petal effect, both with water contact angles larger than 150°. In recent years, 3D printing has gained significant attention for its rapid, low-cost, and precise construction of superhydrophobic materials, and this mini-review provides a comprehensive overview of biomimetic superhydrophobic materials fabricated through 3D printing.
Article
Materials Science, Multidisciplinary
Ada Amendola, Giuseppe Saccomandi, Emanuela Speranzini
Summary: This study investigates the propagation of shear waves in an anisotropic incompressible medium composed of an elastic fiber-reinforced material. The determining equations for such motions are derived, and the nonlinearity of the dynamic problem is attributed to the presence of reinforcing fibers. An asymptotic model is considered for waves with finite but small amplitude. The results show that the material behaves isotropically when the fibers are arranged along the direction of wave propagation. However, when the fibers are tilted, a peculiar mixed second-/third-order nonlinearity is observed for small tilting angles, while a quadratic nonlinearity is sufficient for larger tilting angles. The study's findings are fundamental for understanding the dynamics of fiber-reinforced materials, including dissipative and/or dispersive effects.
MATHEMATICS AND MECHANICS OF SOLIDS
(2023)
Article
Mechanics
Ada Amendola
Summary: This paper presents an analytic study on the existence and properties of solitary waves on 1D chains of lumped masses and nonlinear springs, which exhibit a mechanical response similar to that of tensegrity prisms. The study shows that the shape of the waves depends on the wave speed, and a progressive localization of the traveling pulses in narrow regions of space is observed as the wave speed increases up to a limit value. Comparative analysis confirms that the presented study captures the wave dynamics observed in previous numerical studies on tensegrity mass-spring chains.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2023)
Article
Mechanics
Ada Amendola, Vittorio Zampoli, Raimondo Luciano
Summary: This paper discusses the modeling problem of nanobeams that dissipate thermal energy by radiation. The behavior of nonlocal nanobeams based on Euler-Bernoulli assumptions in a one-dimensional case is studied. With these assumptions, a thermoelastic model that considers the effects of thermal energy radiation to the external environment is proposed, using an extension of the GN-II theory. Wave-form solutions are used to further analyze the formulated theoretical model and highlight the presence of dissipative effects.
Article
Materials Science, Multidisciplinary
Ada Amendola, Antonio Fortunato, Fernando Fraternali, Ornella Mattei, Graeme W. Milton, Pierre Seppecher
Summary: This study generalizes previous research on tension cable networks and compression support grids, and applies them to the design of masonry structures and spider web-inspired structures.
MATHEMATICS AND MECHANICS OF SOLIDS
(2023)
Article
Multidisciplinary Sciences
Ada Amendola, Ornella Mattei, Graeme W. Milton, Pierre Seppecher
Summary: This paper discusses how to design suitable support structures in masonry structures to support specified point forces and avoid certain obstacles. By approximating the obstacles, the problem can be reduced to a linear programming problem. The paper focuses on the two-dimensional case, studying the forces at the vertices of convex polygons and considering both single and multiple obstacles, as well as the case of reactive forces.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Review
Nanoscience & Nanotechnology
Anastasiia O. Krushynska, Daniel Torrent, Alejandro M. Aragon, Raffaele Ardito, Osama R. Bilal, Bernard Bonello, Federico Bosia, Yi Chen, Johan Christensen, Andrea Colombi, Steven A. Cummer, Bahram Djafari-Rouhani, Fernando Fraternali, Pavel I. Galich, Pedro David Garcia, Jean-Philippe Groby, Sebastien Guenneau, Michael R. Haberman, Mahmoud I. Hussein, Shahram Janbaz, Noe Jimenez, Abdelkrim Khelif, Vincent Laude, Mohammad J. Mirzaali, Pawel Packo, Antonio Palermo, Yan Pennec, Ruben Pico, Maria Rosendo Lopez, Stephan Rudykh, Marc Serra-Garcia, Clivia M. Sotomayor Torres, Timothy A. Starkey, Vincent Tournat, Oliver B. Wright
Summary: This review article provides a summary of recent advances and hot research topics in nanophononics and elastic, acoustic, and mechanical metamaterials based on the authors' presentations at the EUROMECH 610 Colloquium. Unlike a conventional review, it focuses on the state-of-the-art and emerging research directions in these fields rather than historical viewpoints. The article covers basic definitions, design strategies, analysis techniques, and discussions of challenges and applications in each topic, offering valuable insights for early-career researchers and others interested in these areas.
Article
Materials Science, Composites
Narinder Singh, Gurminder Singh, Ilenia Farina, Francesco Colangelo
Summary: This article introduces the design and manufacturing of lattice materials using polymer filament wire made of polylactic acid (PLA) and fused deposition modelling (FDM) technology, followed by mechanical testing. Tensile testing of the PLA printed samples has been carried out, showing a tensile strength of 38-40 MPa and a Young's modulus value of 1538 +/- 120 MPa. The lattice design was done using 3D CAD software and numerical results were obtained using the Autodesk Inventor simulation module. The study aims to explore the aspects and feasibility of PLA printed lattice materials with complex shapes and their potential applications.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Mechanics
Fernando Fraternali, Julia de Castro Motta
Summary: This study focuses on the use of tensegrity bracing systems as energy dissipation devices in earthquake-proof timber buildings. The structures consist of lightweight and high-strength timber members and pretensioned elements with a superelastic response. The results show the bi-directional response and the effects of pretension on the mechanical response of the structure, with a comparison of different bracing systems in a full-scale glued laminated timber frame.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Editorial Material
Mechanics
Fernando Fraternali, Anthony D. Rosato
MECHANICS RESEARCH COMMUNICATIONS
(2023)
Article
Construction & Building Technology
Saeedeh Qaderi, Valentina Adinolfi, Giovanni Germano, Gianmario Benzoni, Raimondo Luciano, Fernando Fraternali
Summary: This paper presents a novel two-layer sliding-stretching isolator that can protect buildings and infrastructure from seismic waves. By adjusting the elongation and contraction of tendons, the device can recenter the system and avoid resonance with earthquake frequencies. Shake-table tests on prototypes demonstrate the potential of this two-layer device for real-life applications in multistory buildings.
Article
Engineering, Civil
Giovanni Germano, Saeedeh Qaderi, Valentina Adinolfi, Julia De Castro Motta, Gianmario Benzoni, Ada Amendola, Massimo Ruzzene, Fernando Fraternali
Summary: This work presents procedures and methods for designing, assembling, modeling, and validating a shake-table setup built in-house at the University of Salerno. The setup allows for experimental characterization of seismic protection devices and studies on earthquake-proof structures. Its unique features include the ability to apply various large lateral displacement histories, high vertical loads, and achieve high peak velocities of horizontal motion.
INGEGNERIA SISMICA
(2023)
Article
Materials Science, Composites
G. Jaenicke, A. Vintache, B. Smaniotto, A. Fau, I Farina, F. Fraternali, F. Hild
Summary: In this study, the debonding behavior of fractal fibers embedded in brittle matrices was investigated using X-ray tomography. It was found that there is an articulated load transfer mechanism between the fiber and matrix, and the fiber-matrix interlocking can be affected by geometry-driven tensile stiffening effects between the ribs.
COMPOSITES PART C: OPEN ACCESS
(2022)
Article
Engineering, Multidisciplinary
Filipe A. Santos, Catarina Caroco, Ada Amendola, Marco Miniaci, Fernando Fraternali
Summary: Tensegrity structures have great potential as bracing devices for seismic control, as they can passively dissipate energy in structures subjected to severe deformations. Introducing pre-strain in superelastic cables can achieve a significant amount of equivalent viscous damping, improving the energy dissipation properties of the structure.
INTERNATIONAL JOURNAL FOR MULTISCALE COMPUTATIONAL ENGINEERING
(2022)