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A Multi-Bionic Design Strategy for Flexible, Efficient and Robust High-Performance Energy Absorption Systems Based on Interlocking Sutures Integrated with Bouligand-Arranging Perforations

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SSRN 2024年

作者： Wang, Chao Li, Jiaxuan Sui, Chao Sang, Yuna Zhou, Yichen Zang, Zifu Zhao, Yushun He, Xiaodong National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China School of Astronautics Harbin Institute of Technology Harbin150001 China

As an emerging protective device, the self-locked systems are lightweight, flexible, customizable, and portable. However, existing systems suffer from a low degree of deformation and mechanically inefficient connection structures. To address these issues, a multi-bionic design strategy for high-performance self-locked system was proposed in this work, which perfectly combines the robust joint structure of the interlocking suture with the efficient deformation mode of the Bouligand structures. In the design process, the interlocking suture-inspired system was first studied separately, and its structural stability and deformation behavior were investigated through FEM simulations and experiments. The results showed that, the self-locked system has good structural stability and scalability, while its deformation degree still needs to be improved when the radius/length ratio of the tube units is small. Therefore, inspired by the efficient deformation mode of the Bouligand structure, perforated self-locked systems were developed by perforating a sequence of holes with Bouligand-like distribution in the sidewalls of the tube units. Simulations show that the perforated systems are not only structurally robust, but also have an efficient deformation mode. Compared to other perforated systems, the double-helix perforated system with four vertical perforations is absolutely dominant in the comprehensive evaluation of various mechanical performance indicators. In addition, experimental results showed that the double-helix perforated system can reduce the weight by 10% while increasing the specific energy absorption by 58% compared to non-perforated systems. Therefore, this multi-bionic strategy can integrate the advantages of different natural structures and provide new insights for the design of high-performance protection systems. © 2024, The Authors. All rights reserved.

关键词： Energy absorption

Structural design and performance analysis of large inflatable solar membrane reflector

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Space Solar Power and Wireless Transmission

Space Solar Power and Wireless Transmission 2025年第1期2卷 54-64页

作者： Shuo Bian Size Ai Jianzheng Wei Zhimin Xie Guochang Lin Dongjie Zhang Huifeng Tan Qingxiang Ji Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150080 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 China Université de Franche-Comté Institute FEMTO-ST CNRS Besançon 25000 France

With the growing global energy demand and the pursuit of sustainable energy, solar energy has received widespread attention as a clean and renewable energy source. A structural design of an inflatable, large-scale solar concentrating reflector based on in-orbit assembly is proposed in this paper. The axisymmetric inflated reflector surface is inversely designed through membrane mechanics, and the internal pressures to maintain the reflector surface morphology at different orbital positions and the tiny deformation produced by the reflecting surface under the action of the uniform pressure are determined. A inflatable-rigidizable support structure is prepared by using a rigidizable aramid fabric-reinforced composite. The support structure used to the parabolic reflecting surface is designed, and the diameter and spacing distance of the resistance wire of the heating layer are determined by electrothermal simulation; the combination of solar radiation and electric heating is used to rigidize the reflector in orbit, and the corresponding electric heating time at different orbital positions is also analyzed by in orbit simulation. The heating voltage, folding radius and folding method of the rigidizable support structure are determined through the experimental design, and the folding and deployment experiments are carried out by using the heating and internal pressure and the final shape recovery rate of the support tube is approximately 100 %, which verifies the feasibility of its folding and deployment.

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Gradient C f /ZrB 2 -SiC composites integrating low-density, good mechanical properties and heat-resistant

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Journal of Materials science & technology 2026年 242卷 156-165页

作者： Qiang Gao Ping Hu Yuxuan Xia Yuan Cheng Guangdong Zhao Jiaxin Feng Zibin Chen Xinghong Zhang National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150080 China Beijing Power Machinery Institute The Third Academy of State-owned Aerospace Giant China Aerospace Science & Industry Corporation (CASIC) Beijing 100074 China School of Chemistry and Materials Science Heilongjiang University Harbin 150080 China

Ultra-high temperature ceramic composites (UHTCCs) with low density and exceptional heat resistance are essential for hypersonic vehicle applications, enabling increased payload capacity and higher Mach numbers. However, developing a fabrication process that enables UHTCCs with both lightweight and superior thermal protection performance is still a challenge. To tackle this problem, in this study, a combinatorial process of vibration-assisted slurry impregnation and polymer infiltration pyrolysis was developed to fabricate gradient lightweight C f /ZrB 2 -SiC composites, consisting of continuous carbon fiber fabric, ZrB 2 -SiC and a carbon aerogels (CAs) layer. The resulting composites exhibit a low density of (0.62–0.96 g cm −3 ) but excellent oxidation and ablation resistance, which can withstand ultrahigh temperatures between 2100 °C and 2500 °C. The porous C f /CAs layer, with a density of 0.38 g cm −3 and specific bending and compressive strengths of 43.47 MPa/(g cm −3 ) and 15.53 MPa/(g cm −3 ), respectively, provides both structural integrity and lightweight properties to the C f /ZrB 2 -SiC composite. Furthermore, the density of the composites can be precisely tailored by adjusting the thickness of the C f /ZrB 2 -SiC layer, allowing for customized fabrication to meet diverse service environment requirements. This flexibility highlights the adaptability of the combined processing techniques. The unique combination of controllable low-density properties and exceptional oxidation and ablation resistance endows gradient lightweight C f /ZrB 2 -SiC composites are promising as lightweight, ultra-high temperature thermal protection systems for hypersonic vehicle applications.

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Bioinspired Multi-Stimulus Responsive Mxene-Based Soft Actuator with Self-Sensing Function and Various Biomimetic Locomotion

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SSRN 2023年

作者： Xu, Liangliang Zheng, Haowen Xue, Fuhua Ji, Qixiao Qiu, Changwen Yan, Qian Ding, Renjie Zhao, Xu Hu, Ying Peng, Qingyu He, Xiaodong National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology Harbin150080 China Institute of Industry and Equipment Technology Hefei University of Technology Hefei230009 China

Although a series of outstanding achievements have been realized so far, developing soft actuators that can respond to various stimuli and simulate biological versatility (e.g., self-sensing function, diverse locomotion, etc.) is still a great challenge. Here, by utilizing internal stress generated spontaneously during the preparation process, an originally rolled MXene/polydimethylsiloxane (PDMS) bimorph soft actuator has been designed and fabricated. Based on the outstanding photothermal/electrothermal conversion efficiency and adjustable interlayer d-spacing change of Ti3C2Tx MXene, and the large thermal/chemical vapor expansion of crosslinked PDMS, this actuator can produce reversible large deformation under various forms of stimulus, including heat, light, electric, and n-hexane vapor. More importantly, microcracks can be formed spontaneously on the surface of MXene layer during the fabrication process of the actuator, which causes the resistance of MXene layer to be very sensitive to mechanical deformation. Based on this, a light-driven artificial tongue is fabricated, which not only mimic the ejection motion and catching prey behavior of the frog’s tongue, but also perceive the touching object. Moreover, a series of sophisticated biomimetic locomotion such as jumping, crawling, and self-oscillation all can be realized by using this soft actuator. Besides, the actuator with rolled initial structure can also be an intelligent gripper with low energy consumption. By doping Fe3O4 nanoparticles in PDMS matrix, the composite actuator can carry object to through complex maze in adjustable magnetic field without additional stimulation. This MXene-based actuator provides new insights in design of next generation of smart actuators with multi-functions and multiform motions. © 2023, The Authors. All rights reserved.

关键词： Magnetite

Microstructural Formation and Evolution of Near-Eutectic Al2o3-Zro2 Powders Prepared by a Rapid Cooling Technique: An Extended Composition Range for Complete Eutectic Microstructures Without Primary Dendrites

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SSRN 2022年

作者： Yuan, Yuchen Yu, Wanjun Zheng, Yongting Yu, Yongdong Liu, Xudong Yin, Hang National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology Harbin150080 China

Regulation of eutectic compositions is a difficult challenge due to the limited formation range of this microstructure. Al2O3-ZrO2 powders were successfully prepared through a modified high-temperature melt-assisted air atomization technique. The high-temperature melt (3500 K) was obtained based on the exothermic reaction between Al and O2, which was subsequently atomized and quenched to form composite powders. Eutectic colonies with nanolamellae (62–79 nm) were observed in the as-prepared Al2O3-(28–58 mol%) ZrO2 powders. Importantly, the powders with ZrO2 contents of 38 mol% and 42 mol% showed complete eutectic microstructures without primary dendrites, which indicated an extended obtainable range deviating by ~4.9 mol% from the eutectic composition (CE). The microstructural formation mechanism was discussed based on solidification behavior analysis. Furthermore, the evolution of the microstructure and phase in Al2O3-42 mol% ZrO2 powders was investigated. This work provides a reference for the composition regulation of oxide eutectics. © 2022, The Authors. All rights reserved.

关键词： Eutectics

Designing hard wear-resistant conductors by introducing high-plasma-energy heterogeneous metals into transition metal nitrides

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Journal of Materials science & technology 2023年第26期157卷 213-219页

作者： Yuankai Li Chaoquan Hu Yao Wu Zhenan Qiao Yifan Cheng Zhiqing Gu Gang Gao Weitao Zheng State Key Laboratory of Superhard Materials Key Laboratory of Automobile Materials of Ministry of EducationSchool of Materials Science and EngineeringJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsJilin UniversityChangchun 130012China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China SINOPEC Star Co.Ltd. Beijing 100083China Key Laboratory of Medical Electronics and Digital Health of Zhejiang Province College of Information Science and EngineeringJiaxing UniversityJiaxing 314001China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025China

*** Hard and wear-resistant conductors(HWCs)refer to functional films with simultaneously high hardness,high wear resistance,and good electrical *** have important applica-tions such as next-generation sliding electrical contacts,high-end conductive probe-tip,and oval hole guides for the precision rolling mill[1-4],which has drawn extensive research ***,it is still challenging to integrate high hardness,super wear resis-tance,and high electrical conductivity in one ***-ally,researchers have mainly alloyed the highly conductive met-als Cu,Au,and Pt to improve their hardness and wear resistance.

关键词： wear high electrical

Ultra-fast synthesis and thermodynamic analysis of MoAlB by self-propagating high temperature combustion synthesis

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arXiv

arXiv 2022年

作者： Yin, Hang He, Xiaodong Song, Guangping Yu, Yongdong Zheng, Yongting Bai, Yuelei National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Centre for Composite Materials and Structures Harbin Institute of Technology Harbin150080 China

MoAlB as a typical member of the MAB phases has attracted much growing attention due to its unique properties. However, the low production of MoAlB powders limits its further development and potential applications. To respond this challenge, the ultra-fast preparation of high-purity MoAlB powders is achieved in a few seconds by self-propagating high temperature combustion synthesis (SHS) using the raw powder mixture at the atomic ratio of 1Mo/1.3Al/1B. The reaction mechanism in SHS process was obtained by analyzing the corresponding composition changes of starting materials. Furthermore, the thermodynamic prediction for the SHS reaction of Mo + (1+ y) Al + B = MoAlB + yAl is consistent with the present experiments, where the preparation of MoAlB also conforms to two common self-propagating conditions of SHS. Enthalpy vs temperature curve shows that the adiabatic temperature of the reaction decreases with increasing the amount of excuse Al, but increases when pre-heating the reactants. The thermodynamic calculation method also provides a new idea for the preparation of other MAB phases by SHS. © 2022, CC BY-NC-SA.

关键词： Temperature

Ablation-Cooling Effect During Nanosecond Laser Precision Machining of Cfrp

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SSRN 2024年

作者： Chen, Guanglei Ye, Yunxia Hong, Ziqin Yuan, Zhao Ren, Xudong Shi, Liping School of Mechanical Engineering Jiangsu University Zhenjiang212013 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150006 China

Heat-affected zone (HAZ) in laser machining of carbon fiber reinforced plastic (CFRP) is an important factor affecting the assembly and service performance of CFRP. The ablation-cooling effect induced by nanosecond laser can be used to control HAZ of CFRP and improve the machining efficiency simultaneously. In this paper, the influence of key parameters such as peak power density, pulse width and repetition frequency on the formation mechanism of HAZ and the conditions for ablation-cooling are studied based on simulation and experiment. The simulation results show that ablation-cooling is more likely to occur at the high peak power density and high repetition frequency. The pulse width affects the width of HAZ through the ablation mechanism. The experimental results show that when the peak power density is greater than 108 W/cm2, the ablation-cooling effect effectively reduces HAZ and increases the removal amount, which is consistent with the simulation law. © 2024, The Authors. All rights reserved.

关键词： Carbon fiber reinforced plastics

Near-Zero Thermal Expansion Zrw2o8/Sio2f Wave-Transparent composites: Interfacial Anti-Debonding Structures Based on Polymeric Films

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SSRN 2024年

作者： Wang, Xiaofei Yang, Xuan Ding, Yongwen Zhang, Hui Li, Jinping Meng, Songhe National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150080 China

The interfacial debonding effect on composites limits their wide application in aerospace. This work utilized the unique water-retention properties of hyaluronic acid by adding it to the sintered liquid phase to form polymeric films. A polymeric film wrapped extended sintering time strategy was adopted to synthesize the interface structure with anti-debonding properties. This interface bonding structure enhances the sintering densification ofZrW2O8/SiO2f composites and effectively improves operational accuracy by providing creep resistance. Furthermore, the interface bonding structure reduces the composites' interfacial polarization and reflection loss, enhancing wave-transparent properties in the 2–18 GHz frequency range. Simultaneously, the composites achieve a controllable coefficient of thermal expansion (CTE) by regulating the liquid phase content and reach near-zero CTE (-0.246 × 10-6 °C-1 [30–300 °C]). Finally, the connection between the thermodynamics and sintering densification of composites was revealed by finite element analysis, and it was deduced that increasing sintering densification is beneficial in reducing the thermal stresses and strains inside the composites. This approach effectively solves the interface debonding problem of composites and provides a unique route to design composites. © 2024, The Authors. All rights reserved.

关键词： Finite element method