Article
Optics
Xuefang Yang, Han Zhang, Zhexi Liu, Yubo Fan, Shuhua Yue, Dinglong Ma, Xun Chen, Pu Wang
Summary: Chromatic confocal technology is widely used in industry, especially in device defect detection and ranging. However, traditional chromatic confocal microscopy suffers from slow refresh rate. To overcome this limitation, a new time-stretch chromatic confocal microscopy is proposed, which significantly improves the speed and efficiency of multi-depth imaging.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Zilong Zhang, Rongsheng Lu
Summary: The dispersion objective is a crucial device for chromatic confocal sensor (CCS), affecting the measurement range and maximum measurement slope. This paper presents two initial structures of dispersion objectives based on doublet lenses for CCS, suitable for large dispersion range and high NA design, respectively. Through categorizing doublet lenses by optical power distribution and glass material distribution, combined with different dispersion types, 36 doublet lens structures were obtained for sensor design optimization. The analysis showed that different dispersion types have varying effects on dispersion range and NA, leading to the construction of two optimal initial structures for different sensor requirements.
OPTICS AND LASERS IN ENGINEERING
(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
Optics
Hitesh G. B. Gowda, Matthias C. Wapler, Ulrike Wallrabe
Summary: This article presents two versions of tunable achromatic doublets based on piezo-electrically actuated glass membranes. By controlling the actuation voltages, the chromatic focal shift and focal power can be independently adjusted. These doublets have a large aperture, short response time, and provide spherical aberration correction.
Article
Materials Science, Multidisciplinary
Xuan Chen, Ming-Hui Fu, Wei-Hua Li, Sergey V. Sheshenin
Summary: A novel 3D structure with both ZPR and NPR is proposed by splicing the 2D parallelogram honeycomb structure orthogonally. The structure exhibits different Poisson's ratios in different directions, and its properties are verified through finite element simulation and experiments. This structure may have important applications in aerospace, biomedical, and other fields.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Engineering, Mechanical
Ning Wang, Qingtian Deng
Summary: This study investigated the elastic properties of irregular honeycomb structures, finding that axial deformation has a significant influence on the structure. The elastic properties of the structure are affected by the enclosed area, shape, and material properties.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Ziyang Qu, Meiling Xu, Shuyi Lin, Yiwei Liang, Xuanhao Yuan, Feilong Wang, Jian Hao, Yinwei Li
Summary: In this study, a two-dimensional material called Si2S with a negative Poisson's ratio was predicted using first-principles methods. The Si2S monolayer has a puckered lattice structure and exhibits negative Poisson's ratios along both x and y directions. It also shows semiconductor properties and a high absorption coefficient for visible light, as well as good oxidation resistance. These versatile properties make Si2S a promising material for nanodevices.
Article
Nanoscience & Nanotechnology
Hsin-Jung Tsai, Wei-Chun Li, Wen-Kuang Hsu
Summary: Composites made from multi-walled carbon nanotubes and polydimethylsiloxane exhibit excellent piezoresistivity at elastic limits, with high sensitivity and matched resistance changes during bending and twisting. Pulse-like resistance changes are attributed to the rapid increase in intertube spacing. The movement and segmentation of tube aggregates explain the tube mobility range and sensing mechanism.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2021)
Article
Materials Science, Multidisciplinary
Ning Feng, Yuanhao Tie, Shangbin Wang, Junxian Guo, Zhaoguang Hu
Summary: This paper reports a new annular honeycomb structure with tunable Poisson's ratio. The honeycomb provides both in-plane negative Poisson's ratio and in-plane zero Poisson's ratio by changing the shape of the honeycomb core. The mechanical properties of the developed honeycomb core, constructed by an annulus with four ligaments distributed bi-axial symmetrically, are investigated using theoretical models based on Castigliano's Second Theorem and energy principle. Experimental results and finite element analysis validate the effectiveness of the developed models.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Geochemistry & Geophysics
Hongjian Fang, Malcolm C. A. White, Yang Lu, Yehuda Ben-Zion
Summary: This study derives new 3D seismic wavespeed models and a seismic catalog for Southern California, contributing to improved regional wavespeed models, accurate event locations, and insights into subsurface features and crustal mechanics. The results show correlations with regional geological features and provide more accurate synthetic waveforms for shorter periods. The derived event catalog exhibits tighter spatial clustering than the standard catalog, aiding in characterizing major faults. The study also reveals depth-dependent variations in the Vp/Vs ratio and its correlation with deep seismicity, suggesting the influence of brittle-to-ductile transition depth on crustal mechanics.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Engineering, Electrical & Electronic
Yiqing Ye, Dingrong Yi, Zhiqun Liu, Wei Jiang, Yile Liu
Summary: A novel chromatic differential confocal matrix (CDCM) sensor is proposed for accurate 3D profiling without mechanical scanning. The CDCM utilizes the intensity difference between spectral confocal images for surface height detection, resulting in higher axial sensitivity and profiling efficiency compared to conventional methods. Axial scanning is achieved using residual chromatic aberration and the difference intensity signal between two spectral confocal images. Experimental results show that the CDCM achieves a sub-micrometer axial accuracy and a measurement range of 28 micrometers with a lateral resolution of 0.87 micrometers using a 10xNA 0.25 objective.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Mechanical
Yifu Wan, Tong Guo, Sen Wu, Xinyu An
Summary: In this study, a four-axis measurement system is developed and a tilt scanning measurement method using a chromatic confocal sensor is proposed to measure curved surfaces. The measurement area is divided into different parts, and the proposed method greatly expands the measurement range. The effectiveness of the developed measurement system and the tilt scanning measurement method is clearly verified by measuring a spherical specimen with a radius of 50 mm.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2023)
Article
Chemistry, Physical
Yifan Gao, Minru Wen, Xin Zhang, Fugen Wu, Qinglin Xia, Haoyi Wu, Huafeng Dong
Summary: Negative Poisson's ratio (NPR) materials are widely used in engineering due to their good resistance to shear, denting, and fracture. The NPR phenomenon in 2D single-layer materials can be explained by both mechanical principles and electronic effects, with hinge structures playing a crucial role in determining the inherent NPR.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Mechanics
Yong Peng, Kai Wei, Ming Mei, Xujing Yang, Daining Fang
Summary: A class of 3D metamaterials with programmable coefficient of thermal expansion and Poisson's ratio has been designed through a unique methodology. These metamaterials can widely tailor CTE and easily obtain controllable PR by adjusting geometric parameters. They provide a strategy for programming in multiple axes and coupled programmability of both CTE and PR.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Hassan Mansoori, Ramin Hamzehei, Soheil Dariushi
Summary: This paper introduces a new assembly method using two concentric cylindrical tubes to increase energy-absorption capacity by coupling effects. The results show that this method not only avoids negative stiffness, but also enhances energy-absorption capacity.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2022)
Article
Materials Science, Composites
Mathieu Imbert, Sebastien Comas-Cardona, Emmanuelle Abisset-Chavanne, David Prono
JOURNAL OF COMPOSITE MATERIALS
(2019)
Article
Engineering, Manufacturing
A. Hautefeuille, S. Comas-Cardona, C. Binetruy
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2019)
Article
Engineering, Manufacturing
A. Hautefeuille, S. Comas-Cardona, C. Binetruy
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2020)
Article
Materials Science, Composites
Julie Hemmer, Anne-Sophie Lectez, Erwan Verron, Jean-Michel Lebrun, Christophe Binetruy, Sebastien Comas-Cardona
JOURNAL OF COMPOSITE MATERIALS
(2020)
Article
Engineering, Multidisciplinary
P. D. Mulye, J. Hemmer, L. Morancay, C. Binetruy, A. Leygue, S. Comas-Cardona, P. Pichon, D. Guillon
COMPOSITES PART B-ENGINEERING
(2020)
Article
Engineering, Manufacturing
A. X. H. Yong, A. Aktas, D. May, A. Endruweit, S. V. Lomov, S. Advani, P. Hubert, S. G. Abaimov, D. Abliz, I. Akhatov, M. A. Ali, S. Allaoui, T. Allen, D. C. Berg, S. Bickerton, B. Caglar, P. Causse, A. Chiminelli, S. Comas-Cardona, M. Danzi, J. Dittmann, C. Dransfeld, P. Ermanni, E. Fauster, A. George, J. Gillibert, Q. Govignon, R. Graupner, V. Grishaev, A. Guilloux, M. A. Kabachi, A. Keller, K. Kind, D. Large, M. Laspalas, O. V. Lebedev, M. Lizaranzu, A. C. Long, C. Lopez, K. Masaniar, V. Michaud, P. Middendorf, P. Mitschang, S. van Oosterom, R. Schubnel, N. Sharp, P. Sousa, F. Trochu, R. Umer, J. Valette, J. H. Wang
Summary: This study conducted an international benchmark exercise on the measurement of fibre bed compaction behavior, revealing a large scatter in results among participants and the significant impact of wet conditions on the variation of results, with differences observed between two types of fabrics.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
S. Bancora, C. Binetruy, S. Advani, S. Comas-Cardona
Summary: The paper proposes a method to reconstruct the mesoscale geometry of a textile based on its mechanical response during compaction by using stress boundary conditions acquired through a pressure-sensitive film. By adopting an appropriate material law, the thickness and width information of the yarns can be deduced. This method can be applied on any domain size and capture long-range variability, providing a new approach for shape reconstruction.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Chemical
Francois Mahe, Christophe Binetruy, Suresh Advani, Julien Ferec, Benedikt Eck
Summary: This article provides a general description of a random stack of solid particles and discusses the angular distribution of fine particles distributed evenly on a flat surface, as well as the analytical expression of volume fraction. It also introduces a generalized strain measurement method that takes into account the internal reorganizations of the microstructure and verifies the approach through digital generation.
Article
Engineering, Manufacturing
S. Bancora, C. Binetruy, S. Advani, S. Comas-Cardona, A. Leygue
Summary: In the Resin Transfer Molding (RTM) process, a novel Dual-Scale Skeleton model (DSS) is introduced to solve the challenging task of simulating the dual-scale flow problem at an affordable computational cost. The DSS model replaces the three-dimensional geometry of a multi-layer layup with a skeletonized representation and uses a Reynolds-Darcy finite elements formulation to model the dual-scale flow. Numerical validation and application demonstration show that the DSS model is capable of simulating complex dual-scale flow problems at a reduced computational cost compared to full 3D solutions.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Green & Sustainable Science & Technology
Vincent Lacoma, Jean-Luc Bailleul, Sandy Moisan, Guillaume Vincent, Christophe Binetruy, Olivier Kerbrat
Summary: This paper aims to propose a comprehensive environmental analysis method for assessing the environmental impact of the thermo-stamping manufacturing process of composite parts in the aerospace industry. A detailed description of the manufacturing process is provided, and material and energy balance models are established for each step. The study reveals that over-consumption of composite materials and energy consumed during heating and stamping have the greatest environmental impact on part manufacturing.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Multidisciplinary Sciences
R. S. B. Rathod, M. D. Goel, Tanusree Chakraborty, Vasant Matsagar, Pierrick Guegan, Christophe Binetruy
SN APPLIED SCIENCES
(2019)
Article
Engineering, Multidisciplinary
Keyu Zhu, Xitao Zheng, Jing Peng, Jiaming Sun, Ruilin Huang, Leilei Yan
Summary: This paper discusses the influence of multiple impacts on the compression strength of honeycomb sandwich structures with composite face sheets. It is found that the size of the impactor affects the turning point of the compression strength. Additionally, high impact energy leads to damage in the bottom face sheet and reduces the overall compression strength.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Danqian Wang, Yanfei Yue, Jueshi Qian
Summary: Magnesium Potassium Phosphate Cement (MKPC) as a binder for steel rebars shows improved corrosion resistance when subjected to carbonation, due to the increase in pH and the formation of a more protective oxide film.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Zhibin Li, Wenyu Wang, Pengcheng Xue, Xingyu Wei, Jian Xiong
Summary: This work proposes a design approach and manufacturing method for carbon fiber reinforced plastic (CFRP) corrugated sandwich truncated cones (CSTC) to improve their anti-debonding ability and ensure reliability. The study establishes theoretical models for CSTCs' stiffness and failure modes, which are verified through experiments and finite element analysis (FEA). The research reveals the effect of geometric parameters on failure modes and performs an optimal design for CSTC structures. The findings have significant implications for the design and application of lightweight CSTCs in constructions, such as launch vehicle adapters.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mingyu Zhang, Lei Chu, Jiahua Chen, Fuxun Qi, Xiaoyan Li, Xinliang Chen, Deng-Guang Yu
Summary: This review summarizes the different structures and construction methods of fibrous membranes with asymmetric wettability. It also reviews the biological applications of these membranes and suggests future challenges.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
E. Mofakhami, L. Gervat, B. Fayolle, G. Miquelard-Garnier, C. Ovalle, L. Laiarinandrasana
Summary: This study investigates the effects of fibre concentration on the mechanical response of welded glass-fibre-reinforced polypropylene (GF-PP). Experimental observations reveal a significant reduction in weld ratio, up to 60%, indicating a decreased strength compared to the bulk material. Increasing fibre content in the welded material results in a decrease in stress at break and strain at the maximum stress. The use of DIC technique and X-ray microtomography further confirms the localized strain amplification in the welded zone due to the significant increase in fibre density.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Emad Pourahmadi, Farjad Shadmehri, Rajamohan Ganesan
Summary: This research compares the mechanical properties of laminates manufactured using automated fiber placement and conventional autoclave curing methods. The results show that laminates manufactured using automated fiber placement have a lower interlaminar shear strength compared to laminates reconsolidated using autoclave curing. A finite element simulation method is proposed to quantitatively analyze these differences.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Johnny Jakobsen, Benny Endelt, Fahimeh Shakibapour
Summary: This study proposes a new bolted/pinned joining method for composite applications, which improves load transfer by introducing a patch-type reinforcement. Experimental results demonstrate significant improvements in both static and fatigue load conditions compared to existing methods. Finite element simulations highlight the advantage of this method, as it creates a more efficient load-transferring mechanism through different stress distributions.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Gisele G. Cintra, Janine D. Vieira, Daniel C. T. Cardoso, Thomas Keller
Summary: This paper proposes a novel approach to assess multi-crack behavior in layered fiber-polymer composites. The generated Compliance and R-curves provide useful insights into understanding the multiple delamination process and allow for separate evaluation of strain energy release rate (SERR) for each crack. The developed cohesive zone model successfully simulates the failure process zone of three parallel cracks, showing good agreement between the numerical model and experimental results.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Renil Thomas Kidangan, Sreedhar Unnikrishnakurup, C. Krishnamurthy, Krishnan Balasubramaniam
Summary: The induction heating process can accurately identify fiber orientation and stacking order, making it a valuable tool for large-area inspection and quality control in manufacturing fiber-reinforced composites.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Sungjun Hwang, Yousoo Han, Douglas J. Gardner
Summary: Bleached Kraft pulp, unbleached Kraft pulp, and old corrugated cardboard pulp are suitable for producing cellulose nanofibril suspensions. Spray drying is a fast, simple, cost-effective, and scalable drying method. Spray-dried cellulose nanofibrils can be used as reinforcing materials in polypropylene matrices. The particle size of cellulose nanofibrils affects the material properties.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mehdi Mahdavi, Abbas Zolfaghari
Summary: This study aims to improve the recovery forces of shape memory polymers (SMPs) through material extrusion additive manufacturing. By using glass fiber (GF) as reinforcement and manufacturing multi-layer composite specimens, it was found that PLA with 6.62% GF exhibited the best recovery force, which was further optimized through annealing heat treatment.
COMPOSITES PART B-ENGINEERING
(2024)
Review
Engineering, Multidisciplinary
Xiang Ao, Antonio Vazquez-Lopez, Davide Mocerino, Carlos Gonzalez, De-Yi Wang
Summary: The vulnerability of natural fibers to heat and fire poses a significant challenge for their substitution of traditional fiber reinforcements in composite materials. Natural fiber/polymer composites (NFCs) are regarded as potential candidates for engineering applications due to their environmental friendliness and low-impact sourcing. Thus, appropriate approaches need to be implemented to enhance the fire safety of NFCs. This review summarizes and discusses the latest understanding of flammability and thermal properties of natural fibers, with a special focus on their interaction with polymer matrix in fire behavior. Additionally, the latest developments in flame-retardant approaches for NFCs are reviewed, covering both flame retardancy and fire structural integrity. Finally, future prospects and perspectives on fire safety of NFCs are proposed, providing insights into further advancements of NFCs.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Cheng Wang, Siqi Huo, Guofeng Ye, Bingtao Wang, Zhenghong Guo, Qi Zhang, Pingan Song, Hao Wang, Zhitian Liu
Summary: The demand for multifunctional, transparent epoxy resin with superior dielectric, mechanical, and fire-safety performances is increasing in modern industries. Researchers have developed an epoxidized, phosphaphenanthrene-containing poly(styrene butadiene styrene) (ESD) for advanced fire-safe epoxy resin, which maintains high transparency and improves UV-blocking property. The addition of 10 wt% ESD results in improved mechanical properties, decreased dielectric constant and loss, and outperformance compared to other fire-safe epoxy resins. This research provides an effective method for developing multifunctional flame-retardant epoxy resin.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Bo Pang, Heping Zheng, Zuquan Jin, Dongshuai Hou, Yunsheng Zhang, Xiaoyun Song, Yanan Sun, Zhiyong Liu, Wei She, Lin Yang, Mengyuan Li
Summary: This study develops an internal superhydrophobic material (ISM) using waste denitrification fly ash, which maintains stable hydrophobicity under harsh conditions of use and does not rely on expensive fluor-based surface modifications. The synthesized ISM has excellent matrix strength, strong waterproof properties, and retains superhydrophobicity even at damaged or friction interfaces.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Meirbek Mussatayev, Qiuji Yi, Mark Fitzgerald, Vincent K. Maes, Paul Wilcox, Robert Hughes
Summary: Real-time monitoring of carbon fibre composites during Automated Fibre Placement (AFP) manufacturing remains a challenge for non-destructive evaluation (NDE) techniques. This study designed a directional eddy-current (EC) probe to evaluate the detectability of out-of-plane wrinkles. Experimental evaluations and finite element modeling were conducted to better understand the relationship between eddy-current density and defect detection. The findings suggest that the probe configuration with an asymmetric driver coil and differential pickup coils shows the best capability for wrinkle detection.
COMPOSITES PART B-ENGINEERING
(2024)
