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Bolt Design of Ceramic Matrix Composite and Superalloy Bolted Joint Based on Damage Failure Load

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Journal of Harbin Institute of technology(New Series) 2021年第2期28卷 55-61页

作者： Chao Lv Shuyuan Zhao Zhengyu Li Zeliang Pu Jianglong Dong Xinyang Sun Wenjiao Zhang China Academy of Aerospace Aerodynamics Beijing 100074China National Key Laboratory of Science and Technology for National Defense on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China School of Aeronautics and Astronautics Harbin Institute of TechnologyHarbin 150001China Engineering College Northeast Agricultural UniversityHarbin 150030China

Ceramic matrix composite(CMC)and superalloy bolted joints are commonly used high temperature connection structures in aerospace and aeronautical *** this paper,a finite element model coupled with progressive damage analysis of 2D C/SiC composites and superalloy bolted joint was implemented to simulate the uniaxial tensile loading process by using the ABAQUS finite element *** parametric effects of raised head bolt on stress distribution,tensile performance,and damage process were studied for the CMC⁃superalloy bolted joint *** results showed that the final failure load increased first to the maximum value,and then decreased with the rise of bolt diameter,bolt head diameter,and bolt head thickness,*** the three parameters were 5.0 mm,9.5 mm,and 2.8 mm for the current studied bolt configuration,the joint structure gave the maximum load bearing capacity for the considered parameter *** was also found that around 42%potential improvement in load bearing capacity could be achieved by very small adjustments in bolt parameters of the joints.

关键词： 2D C/SiC composite progressive damage analysis tensile properties bolted joint bolt parameters

Intrinsic ion migration-induced susceptible two-dimensional phase-transition memristor with ultralow power consumption

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science Bulletin 2025年

作者： Qin, Lanhao Yu, Yimeng Fang, Cheng Liu, Yujie Zhu, Kaichen Ouyang, Decai Liu, Shenghong Song, Bailing Zhou, Ruochen Lanza, Mario Hu, Wenhua Wu, Jinsong Li, Yuan Zhai, Tianyou State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Center of Hydrogen Science State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Innovation Center for Future Materials Shanghai Jiao Tong University Shanghai200240 China Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia School of Computer Science and Artificial Intelligence Wuhan University of Technology Wuhan430070 China

Two-dimensional (2D) phase-transition memristors have demonstrated transformative potential for neuromorphic computing, yet challenges like high power consumption, limited endurance, and crystal damage from external ion intercalation persist. Here, we introduce a novel 2D phase-transition memristor leveraging a paradigm-shifting mechanism by exploiting the ultrafast intrinsic Cu+ ion migration within Cu2S. This approach eliminates the need for external ion insertion, significantly reducing crystal damage and enabling exceptional cycling stability with over 400 DC cycles and 500 pulse cycles. The susceptible monoclinic-tetragonal phase-transition induced by intrinsic Cu+ migration achieves an unprecedented SET power consumption of 1 μW at 100 mV, significantly lower in currently reported phase-transition memristors. To further demonstrate the potential of intrinsic ion migration-induced (IIM) memristor, we simulated an IIM memristor crossbar array for image preprocessing in gesture recognition with a high SSIM value of 0.94, showcasing its potential for scalable neuromorphic hardware. This work establishes a new paradigm in low-power, high-performance phase-transition memristors, advancing their practical application in next-generation computing. © 2025 science China Press

关键词： Memristor Neuromorphic device Two-dimensional materials

Surface-Enhanced Transparent Conducting P-Type Cui−Ga2o3 Composite Films with High Hole Transport Performance and Stability

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SSRN 2023年

作者： Xue, Ruibin Gao, Gang Yang, Lei Xu, Liangge Zhang, Yumin Zhu, Jiaqi National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Center of Analysis Measurement Harbin Institute of Technology Harbin150001 China Zhengzhou Research Institute Harbin Institute of Technology Zhengzhou450046 China Key Laboratory of Micro-systems and Micro-structures Manufacturing Ministry of Education Harbin Institute of Technology Harbin150080 China

CuI is a wide bandgap p-type transparent conductor with promising optoelectronic properties. However, conventional CuI films prepared through the iodination of Cu films exhibit rough surface, poor stability and excessively high hole concentration, hindering its application. Herein, we introduce CuI−Ga2O3 composite films as a substitution to overcome the shortcomings of pure CuI. During the iodination process, Ga2O3 hinders the mobility of CuI grain boundaries, resulting in small grain size and low surface roughness. After the charge re-equilibrium between Ga2O3 and CuI, the hole concentration in the films decreased by an order of magnitude. The interface effect of Ga2O3 at the grain boundaries of CuI, increases the hole mobility by 5 times and the conductivity by 53%. The ultra-wide band gap of Ga2O3 enhances the transmittance of CuI films in short wavelength region. Ga2O3 serves to passivate the grain boundaries of CuI, preventing the oxidation of CuI and the loss of iodine, consequently improving the stability of the films. This work deepens the understanding of the failure and hole transport mechanisms of CuI films. © 2023, The Authors. All rights reserved.

关键词： Stability

Origami-Based Bidirectional Self-Locking System for Energy Absorption

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SSRN 2022年

作者： Chen, Zongbing Wei, Xingyu Yang, Lihong Xiong, Jian Center for Composite Materials and Structures Harbin Institute of Technology Harbin150001 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Key Laboratory of Advanced Ship Materials and Mechanics Harbin Engineering University Harbin150001 China

When a periodic structure is subjected to loads exceeding the material yield strength, dislocation slip occurs in its internal unit cells, resulting in a sharp decline in macro mechanical properties. Periodic structures with self-locking effect can overcome this inherent defect and achieve distinguished performance including high energy absorption efficiency. In this respect, thin-walled periodic self-locking dissipative structures have been extensively investigated in recent years. These existing self-locking systems belong to two-dimensional structures and can realize self-locking effect only under the specific load. This paper presents a three-dimensional origami-based bidirectional self-locking system, which can realize self-locking effect under the combined action of normal and shear stress. The energy absorption mechanism of the origami-based cell was revealed by the plastic hinge model, and its specific energy absorption is higher than that of other existing self-locking cells. The compression and bending tests of the origami-based system were carried out, which proved its bidirectional self-locking capacity. This proposed origami-based system possesses excellent energy absorption efficiency, and the unique bidirectional self-locking strategy can significantly expand the design space for periodic energy absorption metamaterials. © 2022, The Authors. All rights reserved.

关键词： Energy absorption

Influence of Assembly Parameters on Tensile Behavior of Hybrid CMC and Superalloy Bolted Joints by Progressive Damage Analysis

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Journal of Harbin Institute of technology(New Series) 2021年第3期28卷 53-60页

作者： Chao Lv Feng Li Shuyuan Zhao Qian Sun Mingrui Li Xinyang Sun China Academy of Aerospace Aerodynamics Beijing 100074China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Shenyang Aircraft Design and Research Institute Aviation Industry Corporation of ChinaShenyang 110000China School of Aeronautics and Astronautics Harbin Institute of TechnologyHarbin 150001China

With the considerable applications of ceramic matrix composites(CMC) in aircraft engineering, the design of CMC bolted joint gains paramount attention because of its capacity to to improve load-bearing efficiency of aircraft key structure. In this work, a 3 D finite element model was established to predict tensile performance and failure modes of single-lap, single-bolt 2 D C/SiC composite, and superalloy joint, which considers the progressive damage behavior of 2 D woven C/SiC composites. On the basis of the developed progressive damage model, a parametric study was carried out to illustrate the effects of bolt preload and bolt-hole clearance on mechanical behaviors of the hybrid bolted joint. It was found that the increase in the value of bolt preload made the failure load grow first and then drop, and the optimum value of bolt preload 5.00 kN generated 56.47% rise in the initial failure load and 22.83% rise in the final failure load for the bolted joint in comparison with zero preload case. As the clearance increased from 0 to 2.00%, the initial and final failure loads respectively declined by 45.88% and 24.02% for 2.00% bolt-hole clearance relative to the neat-fit case. The loss in failure loads can be reduced to compressive stress concentration around the fastening hole-edge area, leading to the appearance of earlier damages by the introduction of increasing bolt hole clearance.

关键词： ceramic matrix composite progressive damage analysis tensile performance bolt preload bolt-hole clearance

Composition, Microstructure, and Mechanical Properties Evolution Behavior of Ta/Tahfc2 Laminated Composite between 1873~2673 K

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SSRN 2023年

作者： Xiao, Peng Dai, Hongliang Li, Zhijian Yu, Yiping Wang, Song State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha410082 China Science and Technology on Advanced Ceramic Fibers and Composites Laboratory College of Aerospace Science and Engineering National University of Defense Technology Changsha410073 China

Ta/TaHfC2 laminated composite shows great potential for application in extreme thermal environments. However, the evolution behavior of the composite at high temperatures is still unknown, as such, it is hard to evaluate whether Ta/TaHfC2 can serve as a structural material stably. Here, we investigated the changes in composition, microstructure, and fracture mode of Ta/TaHfC2 before and after annealing at 1873 ~ 2673 K using XRD and SEM. Results show that the interfacial reaction and grain coarsening go on inside the composite at high temperatures, making its main phases change from Ta & TaHfC2 to Ta2C & TaHfC2, Ta4C3 &TaHfC2, and TaC & TaHfC2 in turn and the porosity gradually increased. The flexural strength of Ta/TaHfC2 decreased at high temperatures but it owns a high strength value of 314 ± 32 MPa with a retention rate is 86% after annealing at 2473 K for 10 min. © 2023, The Authors. All rights reserved.

关键词： Laminated composites

Investigation on Potential Barrier of Terminal Pinned Schottky Junction

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SSRN 2022年

作者： Zhang, Sen Liu, Kang Liu, Benjian Dai, Bing Zhang, Xiaohui Qiao, Pengfei Zhao, Jiwen Li, Yicun Hao, Xiaobin Yang, Lei Cao, Wenxin Han, Jiecai Zhu, Jiaqi National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Key Laboratory of Micro-systems and Micro-structures Manufacturing Ministry of Education Harbin150080 China of unmanned Equipment & AI Zhongshan528400 China

The diamond Schottky theory needs to be further improved before exertising its full advantages, especially in terms of the physical properties of the diamond surface and the interface between metals and diamond. In our previous work, we experimentally verified that the oxygen terminal with a ketone bond introduces an acceptor surface state, 2.22 eV above valence band maximum (VBM), into bandgap at a diamond surface. Here, we further investigated the contact band diagram between metals (Au, Ag, Pt, W, and Pd) with different work function and oxygen terminated diamond using X-ray photoelectron spectroscopy. Results showed that the contact Fermi level was at 2.38 eV, 2.33 eV, 2.32 eV, 2.28 eV, and 2.29 eV above VBM, respectively. In addition, the similar symmetrical photocurrent-voltage characteristics under positive and negative bias were observed between Au-Ag and Ag-Pt electrodes deposited on the same oxygen terminated diamond plate. All the data above could be drawn a conclusion that the oxygen-terminal can pin the Schottky barrier height. We believe that the results obtained herein will help in the design and theoretical analysis of diamond Schottky devices. © 2022, The Authors. All rights reserved.

关键词： Oxygen

Design and Bandgap Tuning of Kresling Origami-Inspired Metamaterials

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SSRN 2024年

作者： Zhang, Ji Gao, Tianyu Wang, Changguo School of Civil Engineering and Mechanics Yanshan University Qinhuangdao066004 China Hebei Key Laboratory of Mechanical Reliability for Heavy Equipments and Large Structures Yanshan University Qinhuangdao066004 China School of Mechanical Engineering Yanshan University Qinhuangdao066004 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Center for Composite Materials and Structures Harbin Institute of Technology Harbin150001 China

In this study, a resonant system based on Kresling origami was designed, utilizing the unique geometric properties of the structure to achieve bandwidth tuning for effective vibration control. Finite element analysis was employed to systematically investigate how variations in folding angles, the number of layers, and overall structural symmetry affect the system’s vibration bandgap characteristics. The analysis revealed that significant vibration bandgaps in the low-frequency range, specifically between 60 Hz and 150 Hz, could be achieved through careful adjustments to the Kresling origami configuration. By manipulating the folding patterns and geometric parameters, the structure was able to suppress vibrations within specific frequency ranges, providing a precise and adaptable approach to vibration isolation. This method eliminates the need for additional materials or complex mechanical systems, significantly simplifying the design and fabrication process while enhancing flexibility. Moreover, the inherent adaptability of Kresling origami structures was demonstrated, showing that the design could be extended beyond spiral bases to incorporate a wide variety of origami forms, further broadening its application potential. These findings demonstrate the practical viability of Kresling origami-based systems in real-world engineering, especially in environments requiring efficient and customizable vibration and noise reduction. The study highlights the structure’s potential in industries such as aerospace, automotive, and civil engineering, where adaptable vibration control is crucial under challenging conditions. © 2024, The Authors. All rights reserved.

关键词： Vibration analysis

Efficient Carbon Nanotube Growth from Pyrolysis of Citric Acid-Based Small Organic Molecules

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SSRN 2022年

作者： Liu, Xue Li, Jingwei Luo, Yuan Li, Jianjun Wei, Zhonglin Cao, Jungang Lu, Haibao Zhang, Dongxing National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China School of Materials Science and Engineering Harbin Institute of Technology Harbin150080 China College of Chemistry Jilin University Changchun130012 China

We prepare carbon nanotubes based on the cross-linking reaction between small organic molecules citric acid and amino urea or ethylenediamine. Factors affecting the yield of carbon nanotube are optimized and catalytic effect of hydrated metal nitrate on carbon nanotube growth is investigated. The results demonstrate that carbon nanotube can grow in a wide range of urea content. Even two-dimensional sheet assembled by the prepared carbon nanotubes is observed when ethylenediamine is used. It is believed that such competitive strategy can expand the techniques for efficient, large-scale and low-cost synthesis of carbon nanotubes. © 2022, The Authors. All rights reserved.

关键词： Carbon nanotubes