Article
Materials Science, Composites
Yun Wan, Changfu Tang, Zhiyuan Jiang, Fangxin Wang, Chaojie Hu, Bin Yang
Summary: This paper investigates the application of shape memory alloy (SMA) in carbon fiber-reinforced polymer (CFRP) T-shape structures. Through tensile tests, the enhancing laws and reinforcement mechanisms are revealed. The roles of SMA in adhesive repair of permanent damage in T-joints are analyzed. Overall, SMA's advantages of super-elasticity and shape memory are utilized to improve the mechanical properties and adhesive repair of CFRP T-joints.
COMPOSITES COMMUNICATIONS
(2023)
Article
Engineering, Multidisciplinary
Jiacheng Cui, Wei Liu, Yang Zhang, Lei Han, Pengbo Yin, Yajun Li, Mengde Zhou, Ping Wang
Summary: In this paper, a robust delamination extraction algorithm and integrated evaluation method are proposed to address the challenge of delamination inspection in composite components. The extraction of delamination is achieved through contour extraction, robust circle fitting, and adaptive threshold segmentation. A statistical quality description factor is designed to quantify the multidimensional information of delamination. Experimental results demonstrate the effectiveness of the proposed method.
Article
Automation & Control Systems
Fei Su, Wenyi Li, Chen Juan, Xu Xu, Chunjie Li
Summary: Experimental results show that using the novel drill-milling process can significantly reduce burrs and delamination in CFRP hole-making, improving hole quality and accuracy. Proper selection of helical milling parameters is crucial for optimizing the process.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Shoichi Tamura, Takashi Matsumura
Summary: This paper presents a novel drilling method with variable feed rate to machine delamination-free holes at a high machining rate in carbon fiber reinforced plastic (CFRP) aircraft parts assembly. The method controls delamination by utilizing negative thrust at higher feed rates after the chisel exits from the workpiece, and is validated through cutting force measurements and friction angle analysis.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2021)
Article
Materials Science, Composites
Tarakeswar Barik, Kamal Pal
Summary: This study addressed the parametric investigation on drilling capability of TiAlN- and TiN-coated drills over the uncoated one for carbon fiber reinforced plastics (CFRPs). The results showed that coated drills generated more uniform torque and improved drilled hole quality, while feed rate had a more predominant effect on delamination compared to spindle speed, especially when using coated tools.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2021)
Article
Computer Science, Interdisciplinary Applications
Rongchao Jiang, Zhenchao Jin, Shukun Ci, Dawei Liu, Haixia Sun
Summary: The lightweight design of the control arm using carbon fiber-reinforced plastic (CFRP) can improve fuel economy and driving performance. A multilevel optimization method was proposed to optimize the CFRP control arm, including ply optimization and multiobjective reliability optimization. The results show that the optimized CFRP control arm has improved performance stability and reduced mass by 38.34%.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Materials Science, Composites
Dacheng Li, Xiongwen Jiang, Licheng Guo, Runqiang Chi, Wenbo Xie, Wei Zhang
Summary: The study aims to develop an experimental method to evaluate the resistance performance of carbon fiber reinforced polymer laminates against ice impact. The impact behavior and deformation process were analyzed using a hollow tube sensor, a high-speed camera, and 3D digital image correlation method. The results showed that the ice projectiles caused distributed loadings and delaminations on the laminates, with delaminated areas increasing in size with impact velocity.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2022)
Article
Engineering, Chemical
Ryan Gunckel, Bonsung Koo, Yifei Xu, Wendy J. Lin, Asha Hall, Aditi Chattopadhyay, Lenore L. Dai
Summary: The study successfully incorporated a fluorescent cinnamoyl mechanophore into a glass fiber reinforced polymer composite, allowing for the detection of interphase stresses and damage through monitoring of the mechanophore. This provides a deeper understanding of how damage initiates in the material.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Review
Chemistry, Multidisciplinary
Mohammad Hamidul Islam, Shaila Afroj, Mohammad Abbas Uddin, Daria Andreeva, Kostya S. Novoselov, Nazmul Karim
Summary: Graphene and carbon nanotubes have shown great potential in enhancing the properties of fiber-reinforced polymer composites. However, the effective incorporation of these carbon nanomaterials without compromising the performance of the composites remains challenging.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Composites
Yun Zhang, Xiaojie Xu
Summary: CFRP is widely used in aircraft structural applications due to its superior properties, but drilling-induced delamination is a major concern. In this study, a GPR model is developed to predict delaminations in CFRP composites during drilling, which, combined with the Taguchi method, can provide faster optimization of machining processes with more quantitative data extracted from fewer experimental trials.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Mechanics
Teng Gao, Changhe Li, Yiqi Wang, Xueshu Liu, Qinglong An, Hao Nan Li, Yanbin Zhang, Huajun Cao, Bo Liu, Dazhong Wang, Zafar Said, Sujan Debnath, Muhammad Jamil, Hafiz Muhammad Ali, Shubham Sharma
Summary: This paper presents a systematic scheme for suppressing drilling damage in carbon fiber reinforced polymer (CFRP) materials. The formation mechanism of damage at different hole positions is analyzed, and suppression strategies are reviewed from drilling techniques, conditions, tool design, and multi-techniques integration. The paper also summarizes the methods for damage evaluation and identifies the advantages of various suppression strategies, as well as prospects for future research directions.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Manufacturing
Pei Wang, Long Wang, Kejia Kang, Jian Yin, Xiang Xiong, Hongbo Zhang
Summary: The study found that copper mesh-carbon/carbon (C/C) composite and copper foam-C/C composite have more advantages over pure carbon strip in terms of electrical conductivity, compact strength, and wear resistance. Carbon fibers are able to withstand failure energy and block crack growth during impact and current-carrying friction tests, thereby enhancing mechanical strength and wear resistance. Additionally, the random distribution of short-cutting carbon fibers is conducive to the formation of a smooth tribolayer for copper foam-C/C composite.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Chemistry, Multidisciplinary
Dong-Jun Kwon, Jaehyun Park, Hyeong-Min Yoo
Summary: This study investigates the inclination phenomenon caused by the clearance between the fastener and hole when joining metal and composite materials using mechanical fastening. The impact of inclination on the lap shear strength is quantitatively analyzed. The use of structural adhesive to fill the clearance in riveting improves the strength between CFRP and steel by approximately 33%. In bolting, a washer is required to reduce force on the bolt and bending deformation of the steel plate. Filling the clearance with structural adhesive also produces similar effects as using a washer. The force distribution in the fastening segment is calculated and demonstrates the importance of using clearance-filling in mechanical bonding for strong fastening.
APPLIED SCIENCES-BASEL
(2023)
Article
Mechanics
Yidong Zhang, Kai Huang, Rongqing Sun, Feng Liao, Licheng Guo, Li Zhang
Summary: This paper investigates the mechanical behaviors of carbon fiber reinforced composites with embedded delamination under compressive loads. A method combining the Puck failure criterion and damage mechanics is used to evaluate the failure of delamination-embedded specimens. The study shows that the number, total area, and distribution of embedded delamination significantly influence the compression performance of the specimens.
COMPOSITE STRUCTURES
(2022)
Article
Automation & Control Systems
Chunjie Su, Xiang Cheng, Xinhua Yan, Guangming Zheng, Yang Li, Zonggao Mu
Summary: This research investigates the helical milling process for hole making on CFRP and explores two cutting conditions. The study finds that the jet cold air condition is more suitable for helical milling of holes on CFRP with better qualities.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Masahito Ueda, Shun Kishimoto, Masao Yamawaki, Ryosuke Matsuzaki, Akira Todoroki, Yoshiyasu Hirano, Antoine Le Duigou
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2020)
Review
Materials Science, Multidisciplinary
Antoine Le Duigou, David Correa, Masahito Ueda, Ryosuke Matsuzaki, Mickael Castro
MATERIALS & DESIGN
(2020)
Article
Materials Science, Composites
Keisuke Iizuka, Akira Todoroki, Takuya Takahashi, Masahito Ueda
Summary: The study monitored 3D printed CFRTPs using the electrical resistance change method, revealing a larger standard deviation in resistance along the 90 degrees orientation and reverse piezo-resistivity in cyclic tests at low stress ranges.
ADVANCED COMPOSITE MATERIALS
(2021)
Article
Mechanics
Akira Todoroki, Tatsuki Oasada, Masahito Ueda, Ryosuke Matsuzaki, Yoshiyasu Hirano
Summary: This study proposes a simple method to reinforce the lay-up direction of 3D-printed composites. By inserting a reinforcing bar with continuous carbon fibers into a through hole and applying a large electric current to melt the bar and fuse it to the part, the stiffness and strength of the part are effectively increased.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Manufacturing
Hirohide Shiratori, Akira Todoroki, Masahito Ueda, Ryosuke Matsuzaki, Yoshiyasu Hirano
Summary: This study proposed a test method for evaluating the strength of curved sections of 3D printed continuous carbon fiber reinforced thermoplastics. Curved beam tests were conducted using L-shaped specimens with designed test jigs, which were verified with finite element analysis. Testing different geometries of L-shaped specimens revealed the effect of radius on circumferential strength, while investigating the failure mechanism through X-ray CT images showed that compressive failure occurred first with decreasing radius.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Composites
Yan Ma, Tomohiro Yokozeki, Masahito Ueda, Yuqiu Yang, Hiroyuki Hamada, Toshi Sugahara
Summary: Finite element simulation shows that the interface properties are crucial in determining the fracture behavior of unidirectional CF/PA6 laminates. Laminates with weak interface properties exhibit a splitting fracture mode, while those with strong interface properties show a step-like fracture behavior.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
A. Le Duigou, T. Fruleux, R. Matsuzaki, G. Chabaud, M. Ueda, M. Castro
Summary: 4D printing is focused on integrating targeted morphing functions by controlling material properties and architecture. This study evaluates the potential of tailoring 4D printing to Hygromorph BioComposite (HBC) and shows that selecting the appropriate matrix can enhance morphing performance, especially when using a soft Poly Buthylene Succinate (PBS) matrix. 4D printing with control over layer height allows for complex actuation and local thickness/stiffness ratio control.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Composites
Shiryu Morita, Masahito Ueda, Takuya Takahashi, Kentaro Kajiwara, Akinori Yoshimura, Naoki Sugiura
Summary: In this study, X-ray computed tomography of unidirectional CFRP composites was performed, and a numerical model of CFRP was automatically generated using digital image correlation. The results showed that the accuracy of fiber tracking is crucial for generating duplicate CFRP without overlapping fibers, and the accuracy improved with decreasing distance between tomograms.
ADVANCED COMPOSITE MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Naruki Ichihara, Masahito Ueda
Summary: A framework is proposed for producing optimized infill structures for 3D-printed curvilinear fiber-reinforced polymer composites. The material orientation was optimized to maximize physical properties, and a phase field of stripe patterns was developed based on the optimized material orientation vector field using a local activation and long-range inhibition system. The phase field was then converted into a 3D print path. Numerical and experimental validations demonstrated that the optimized infill structure exhibited higher structural stiffness compared to commonly used concentric or rectilinear strategies, highlighting the advantage of the proposed method.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Mechanics
Ryota Sako, Ryoma Aoki, Ryo Higuchi, Masahito Ueda, Yuta Urushiyama, Tomohiro Yokozeki
Summary: The purpose of this study is to establish end-notched flexure (ENF) tests for curved beam specimens and propose a compliance-based beam method (CBBM) for data reduction. The results showed good agreement between the ENF tests and curved beam theory, and the fracture toughness values obtained from the proposed CBBM were validated using finite element analysis.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Naruki Ichihara, Masahito Ueda
Summary: This study introduced a design framework to improve the toughness of 3D-printed carbon fiber-reinforced composite structures by utilizing intermediate material fraction obtained in the topology optimization. The framework was based on anisotropic topology optimization considering material fraction and material orientation. Experimental validations showed that the framework enhanced the toughness of the 3D-printed carbon fiber-reinforced composite structure.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Masahito Ueda, Naruki Ichihara, Tomohiro Yokozeki, Takeshi Watanabe, Yusuke Tsuchiyama, Yuta Urushiyama
Summary: The elastic, plastic, and in-plane damage evolutions of a carbon-fiber-reinforced epoxy composite fabricated via filament winding were studied using continuum damage mechanics. The specific voids and resin-rich region distributions were influenced by the material and manufacturing conditions. The damage evolution was described by a unified curve, demonstrating that the continuum damage mechanics approach provided a reliable prediction, although the critical damage at ultimate failure depended on the material and manufacturing conditions. The damage coupling parameters were also affected by these conditions, resulting in changes in the damage evolution behavior under simultaneous shear and transverse damage development situations.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Manufacturing
Masahito Ueda, Yuki Suzuki, Silvestre T. Pinho
Summary: The analytical method for calculating the axial compressive stress-strain relationship of a unidirectional carbon fiber-reinforced plastic (UD CFRP) was presented, taking into account the variability of the fiber misalignment angle. It was found that the load-bearing capabilities of different fiber groups decreased significantly with greater misalignment angles. Fibers with a misalignment angle of 0.5 degrees showed a large load drop after reaching their maximum loading, leading to ultimate failure.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
Masahito Ueda, Yunosuke Tasaki, Chikara Kawamura, Kenji Nishida, Masanori Honda, Koichi Hattori, Toshiaki Miyanaga, Tetsuya Sugiyama
Summary: In this study, the global fiber kinking theory for estimating the axial compressive strength of unidirectional carbon fiber reinforced plastic was modified to address the localized fiber kinking problem. The deterministic mechanism of compressive strength and kink-band width was interpreted using graphical methods. The estimated values of composite axial compressive strength and kink-band width based on shear properties of the composite and matrix were found to be in good agreement with experimental results.
COMPOSITES PART C: OPEN ACCESS
(2021)
Article
Multidisciplinary Sciences
Masahito Ueda, Vu Manh Cuong, Atsushi Yamanaka, Kazuhiro Sakata
Article
Mechanics
Xiaolong Liu, Kelian Luo, Pengcheng Gao, Tao Cong, Xi Wang, Wenjing Wang
Summary: This paper investigates the formation mechanisms of the zig-zag crack region on the shattered rim of railway wheels. The zig-zag crack region, identified as a typical region for crack propagation in rolling contact fatigue behavior, was observed using scanning electron microscopy and transmission electron microscopy. The formation of the zig-zag morphology is attributed to the periodic deflection of the propagation path relative to the initial propagation plane, caused by the limited plastic deformation zone at the crack tip. Grain refinement and secondary cracks in the zig-zag crack region are a result of the large compressive and shear stresses induced by rolling contact loading.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Anastasia Iziumova, Aleksei Vshivkov, Ivan Panteleev, Virginia Mubassarova, Oleg Plekhov, Denis Davydov
Summary: The aim of this study was to investigate the correlation between structural, acoustic emission, and thermal characteristics of fatigue crack growth in titanium alloys. Cluster analysis of the acoustic emission signals revealed two different types of signals observed during the fatigue crack development. It was experimentally demonstrated that the stored energy tends to reach an asymptotic value at the final stage of fatigue crack growth and this is correlated with the twinning process intensification in titanium alloy Ti Grade 2. A correlation was assumed between the stages of change in heat flux, the cumulative energy of the first cluster of acoustic emission signals, and the crack length.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
M. Vieira de Carvalho, I. A. Rodrigues Lopes, F. M. Andrade Pires
Summary: This study investigates the numerical challenges of fracture mechanics models within implicit quasi-static frameworks and proposes an instability criterion. The ratio of cohesive to internal power is identified as a crucial factor. Two strategies for handling fracture problems with instabilities are discussed and a comparative assessment is performed. The study also examines more complex material responses, including transformation-induced plasticity effects.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Thomas Duminy, Aurelien Doitrand, Sylvain Meille
Summary: This study conducted in situ wedge splitting tests on millimeter-size PMMA samples and proposed a method to determine the material tensile strength and critical energy release rate using digital image correlation and a full finite element implementation of the coupled criterion.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Xin Chang, Xingyi Wang, Chunhe Yang, Yintong Guo, Yanghui Wan
Summary: The influence of cyclic thermal shock and high-temperature acid etching on the Mode I fracture of shale was investigated in this study. It was found that cyclic thermal shock severely degrades the strength and fracture toughness of shale, while high-temperature acid etching treatment improves the fracture toughness. These findings are valuable for optimizing process parameters to reduce initiation pressure in deep shale formations.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Liaojun Yao, Mingyue Chuai, Zhangming Lyu, Xiangming Chen, Licheng Guo, R. C. Alderliesten
Summary: Methods based on fracture mechanics have been widely used in fatigue delamination growth (FDG) characterization of composite laminates. This study proposes appropriate similitude parameters to represent FDG behavior with different R-ratios.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Zesheng Zang, Zhonghui Li, Yue Niu, Shan Yin
Summary: This study conducted experiments and recorded signals to investigate the fracture behavior and damage evolution characteristics of coal samples. The results showed that as loading proceeds, the stress, electric potential (EP), and acoustic emission (AE) values increase, and EP and AE signals are excited when stress drops. The fracture behavior of coal samples is altered by flaw inclination, and the destruction mode becomes increasingly complicated. The damage evolution characteristics of coal samples can be evaluated and analyzed by defining the coefficient of variation (CV value) of EP and the b value of AE.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Clotilde Berdin, Nathalie Prud'homme
Summary: In this study, zirconia layers with different fractions of tetragonal phase and thicknesses were tested for multi-cracking behavior. Cracks perpendicular to the tensile direction were observed, showing a blunting effect into the substrate. The ratio of crack spacing at saturation to layer thickness decreased as the layer thickness increased. Unit cell modeling was used to establish a relationship between crack spacing and layer strength, which fell within the bounds of Hu and Evans model and was found to be insensitive to the tetragonal zirconia fraction.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Huadong Zhang, Weichen Kong, Y. H. Liu, Yuh J. Chao
Summary: Williams' series expansion crack tip solution in linear elasticity is modified to include a uniform crack face pressure. Practical methods to calculate T-stress from near crack tip stresses are outlined. The analytical results are consistent with numerical results.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Jiahao Kong, Haoyue Han, Tao Wang, Guangyan Huang, Zhuo Zhuang
Summary: This paper introduces a phase-field model for polymer foam materials by combining the phase-field method with the crushable foam model. The model is calibrated using experimental data and successfully simulates the fracture processes of polyurethane under different loading conditions. The study is important for the engineering applications of polymer foam materials.
ENGINEERING FRACTURE MECHANICS
(2024)
