Article
Instruments & Instrumentation
Dong Li, Guoyang Shen
Summary: This study proposed a series of isotropic negative Poisson's ratio (NPR) Voronoi foam models based on a modified Voronoi tessellation technique, and investigated their Poisson's ratio, stress-strain relationship, and energy absorption ability. The results showed that the proposed foam structure exhibited NPR, isotropic behavior, and superior energy absorption compared to isotropic NPR chiral lattice foam-filled tube.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Maryam Morvaridi, Giorgio Carta, Federico Bosia, Antonio S. Gliozzi, Nicola M. Pugno, Diego Misseroni, Michele Brun
Summary: A novel two-dimensional hierarchical auxetic structure is proposed, utilizing interactions between different scale cuts to achieve a Poisson's ratio close to the minimum limit. Experimental validation on a polymeric specimen demonstrates the effectiveness of the structure, which shows potential for various engineering applications.
EXTREME MECHANICS LETTERS
(2021)
Article
Multidisciplinary Sciences
M. J. Khoshgoftar, A. Barkhordari, M. Limuti, F. Buccino, L. Vergani, M. J. Mirzaali
Summary: Sandwich panel structures with re-entrant core lattices have been studied for their mechanical properties. The study investigated the response of a three-layered sandwich plate with a re-entrant core lattice under flexural bending, analyzing the effects of different geometrical parameters of the lattice structures. The results showed that the core structures with auxetic behavior resulted in higher bending strength and minimum out-of-plane shear stress, indicating their potential for advanced engineering applications in aerospace and biomedical fields.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Anshuai Wang, Xuehui Yu, Han Wang, Yu Li, Jie Zhang, Xueling Fan
Summary: This paper studied the dynamic response of continually density-graded aluminum foam sandwich tubes under internal explosion load. A 3D mesoscopic finite-element model of the sandwich tubes was established and validated. The influences of core density distribution, core density gradient, and core thickness on blast resistance were analyzed. The results showed that the sandwich tube with the negative-gradient core had better blast resistance, while the one with positive-gradient or middle-hard-gradient core had worse resistance. Increasing core thickness decreased deformation but also reduced energy absorption.
Article
Nanoscience & Nanotechnology
Yi Luo, Ke Yuan, Lumin Shen, Jiefu Liu
Summary: This study investigates the compression and impact resistance performance of honeycombs and sandwich panels with different Poisson's ratio. By analyzing critical criteria such as local indentation profile, global deflection, impact force and energy absorption, the study reveals the influential mechanism of Poisson's ratio on the local impact resistance of sandwich panels.
REVIEWS ON ADVANCED MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Daniel John Clarke, Francesca Carter, Iestyn Jowers, Richard James Moat
Summary: This paper introduces a new cellular metamaterial with a honeycomb structure that achieves zero Poisson's ratio. Compression testing and computational modeling show that the behavior of this metamaterial is isotropic and consistent across a range of relative densities. This metamaterial is expected to enable previously unfeasible technologies.
APPLIED MATERIALS TODAY
(2023)
Article
Materials Science, Multidisciplinary
Xi Zhang, Qing-Min Chen, Zhong-Yi Cai
Summary: This study investigated the predicting and avoiding method of core fracture in plastic forming for aluminum foam sandwich panel (AFSP) by introducing ductile fracture criteria and conducting experiments and simulations. It was found that multi-step forming and increasing core relative density can reduce the risk of core fracture during curved AFSP forming.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Polymer Science
Chunhao Yang, Wuning Ma, Zhendong Zhang, Jianlin Zhong
Summary: This study investigates the low-velocity impact response of sandwich plates with negative Poisson's ratio (NPR) auxetic honeycomb core and functionally graded carbon nanotubes reinforced composite (FG-CNTRC) face sheets. The effects of various factors, such as gradient forms of FG-CNTRC surfaces, volume fractions of CNTs, impact velocities, and temperatures, on the response of the sandwich plates are analyzed using theoretical and numerical methods.
Article
Physics, Condensed Matter
Guoyang Shen, Xin Wang, Dong Li
Summary: A novel negative Poisson's ratio foam-filled corrugated tube with an NPR isotropic foam core is established using the finite element method. The tube shows a decrease in Poisson's ratio with increasing compression ratio, reaching a minimum value of -0.076 at eta = 0.2. This configuration also exhibits a 10.8% higher energy absorption capacity compared to tubes with uncompressed foam core.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Weihua Gao, Jiantao Yao, Kunming Zhu, Pengwei Zhao, Xinbo Chen
Summary: This research proposes an innovative mechanical structure method by embedding a PDMS elastomer with negative Poisson's ratio (NPR) in a graphene-silicon rubber foam composite (rGO-PDMS/SR), which effectively improves the mechanical performance and resistance variation range for interactive information monitoring of multiple parts of the human body. The experimental results show that the rGO-PDMS/SR has expanded resistance variation range by six times compared to ordinary graphene-silicon rubber composites (rGO-SR), with high linear sensitivities and reliable stability during cyclic compression. Human interaction experiments demonstrate its good performance in signal detection for facial expression judgment, motion state monitoring, and other fields.
IEEE SENSORS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Lihong Yang, Xuyang Li, Fan Zi, Shijie Yang, Zexu Zhang, Jia Qu, Yalun Dong, Linzhi Wu
Summary: The study focused on the dynamic responses of layered PVC foam and Kevlar composite under air blast loads, revealing that the gradient strategy of foam core significantly influences the sandwich panels and increasing the thickness of the back sheet is an effective method to improve blast resistance.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Mathematics, Applied
Qiao Zhang, Yuxin Sun
Summary: This paper proposes a 3D Maltese cross metamaterial with negative Poisson's ratio and negative thermal expansion as the core layers in sandwich plates, aiming to investigate the relationship between the mechanical responses of sandwich composites and the metamaterial properties. The negative properties of the metamaterial are analytically derived based on energy conservation and validated using the finite element method. The results show that negative Poisson's ratio and negative thermal expansion can enhance the stiffness of sandwich structures, and the geometric parameters of the metamaterial significantly affect the thermal stress, natural frequency, and buckling load.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2023)
Article
Chemistry, Physical
Xinlong Yang, Zhen Wang, Yifeng Zhong, Rong Liu
Summary: In this study, a novel petal-triangle core sandwich panel (SP-PSC) was proposed based on a star-shaped core. A variational asymptotic method-based equivalent two-dimensional model (2D-EPM) was developed to conveniently and quickly analyze the complex structure of the sandwich panel. The effects of geometric parameters on the equivalent stiffness, buckling, natural frequency, and negative Poisson's ratio (NPR) effect were investigated. It was found that the NPR of SP-PSC increased first and then decreased with the increase in the fiber angle. Furthermore, two improved core designs (PSC-X and DSC) were proposed and compared with SP-PSC, showing significantly improved stress concentration and equivalent stiffness.
Article
Engineering, Mechanical
Ganchao Chen, Yuansheng Cheng, Pan Zhang, Jun Liu, Changhai Chen, Sipei Cai
Summary: The study introduced a metallic auxetic double arrowhead honeycomb core sandwich panel and investigated its deformation response and energy dissipation characteristics under air blasts. Results indicated that the deformation response of the panel was closely related to their deformation/failure mechanisms. Changing the core web thickness and inclined angles significantly influenced the panel deformation response. Increasing the number of core layers led to a more remarkable decrease in permanent deflections.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Polymer Science
Jianqin Wu, Jiannan Zhou, Xinli Kong, Ying Xu, Yishun Chen, Juyan Zhu, Fengnian Jin, Peng Wang
Summary: In this study, a honeycomb cylindrical shell was prepared to overcome the fracture problem of the hexagonal honeycomb during rolling. The honeycomb sandwich tubes (AHSTs) with a variable Poisson's ratio were successfully fabricated and showed excellent mechanical properties as a core for sandwich structures.
Article
Engineering, Mechanical
Rosaria Del Toro, Maria Laura De Bellis, Marcello Vasta, Andrea Bacigalupo
Summary: This article presents a multifield asymptotic homogenization scheme for analyzing Bloch wave propagation in non-standard thermoelastic periodic materials. The proposed method derives microscale field equations, solves recursive differential problems within the unit cell, establishes a down-scaling relation, and obtains average field equations. The effectiveness of this approach is validated by comparing dispersion curves with those from the Floquet-Bloch theory.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Yue Bao, Zhengcheng Yao, Yue Zhang, Xueman Hu, Xiandong Liu, Yingchun Shan, Tian He
Summary: This paper proposes a novel triple-gradient phononic acoustic black hole (ABH) beam that strategically manipulates multiple gradients to enhance its performance. The study reveals that the ABH effect is not solely brought about by the thickness gradient, but also extends to the power-law gradients in density and modulus. The synergistic development of three different gradient effects leads to more pronounced and broader bandgaps in PCs.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Matthias Ryser, Jason Steffen, Bekim Berisha, Markus Bambach
Summary: This study investigates the feasibility of replacing complex experiments with multiple simpler ones to determine the anisotropic yielding behavior of sheet metal. The results show that parameter identifiability and accuracy can be achieved by combining multiple specimen geometries and orientations, enhancing the understanding of the yield behavior.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Wenjun Li, Pengfei Zhang, Siyong Yang, Shenling Cai, Kai Feng
Summary: This study presents a novel two-dimensional non-contact platform based on Near-field Acoustic Levitation (NFAL), which can realize both one-dimensional and two-dimensional transportation. Numerical and experimental results prove the feasibility and ease of this method.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Shuo Liu, Lu Che, Guodong Fang, Jun Liang
Summary: This study presents a novel lamina conjugated bond-based peridynamic (BB-PD) model that overcomes the limitations of material properties and is applicable to composite laminates with different stacking sequences. The accuracy and applicability of the model are validated through simulations of elastic deformation and progressive damage behavior, providing an explanation of the damage modes and failure mechanisms of laminated composite materials subjected to uniaxial loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Omar El-Khatib, S. Kumar, Wesley J. Cantwell, Andreas Schiffer
Summary: Sandwich-structured honeycombs (SSHCs) are hierarchical structures with enhanced mass-specific properties. A model capable of predicting the elastic properties of hexagonal SSHCs is presented, showing superior in-plane elastic and shear moduli compared to traditional honeycombs, while the out-of-plane shear moduli are reduced.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Zhi-Jian Li, Hong-Liang Dai, Yuan Yao, Jing-Ling Liu
Summary: This paper proposes a process-performance prediction model for estimating the yield strength and ultimate tensile strength of metallic parts fabricated by powder bed fusion additive manufacturing. The effect of main process variables on the mechanical performance of printed metallic parts is analyzed and the results can serve as a guideline for improvement. The accuracy of the proposed model is validated by comparison with literature.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Saman A. Bapir, Kawa M. A. Manmi, Rostam K. Saeed, Abdolrahman Dadvand
Summary: This study numerically investigates the behavior of an ultrasonically driven gas bubble between two parallel rigid circular walls with a cylindrical micro-indentation in one wall. The primary objective is to determine the conditions that facilitate the removal of particulate contamination from the indentation using the bubble jet. The study found that the bubble jet can effectively remove contamination from the indentation for certain ranges of indentation diameter, but becomes less effective for larger indentation diameters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
E. Polyzos, E. Vereroudakis, S. Malefaki, D. Vlassopoulos, D. Van Hemelrijck, L. Pyl
Summary: This research investigates the elastic and damage characteristics of individual composite beads used in 3D printed composites. A new analytical probabilistic progressive damage model (PPDM) is introduced to capture the elastic and damage attributes of these beads. Experimental results show strong agreement with the model in terms of elastic behavior and ultimate strength and strain.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
