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学者姓名：关成龙
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Abstract ：
A bistable composite tape-spring (CTS) structure is a thin-walled open slit tube with fibres oriented at +/- 45 degrees, which is stable at both the extended and fully coiled configurations. Owning to its positive Gaussian curvature deformation mechanics and high stowage-to-pack ratio, it has been successfully applied and launched to International Space Station and microsatellites to construct deployable solar sails. Intelligent driving designs of the CTS-based deployable structures are becoming more and more important to further reduce weight and complexities for space applications. Here, we presented novel findings on the passive thermal driving mechanics of the bistable CTS structure. This is achieved by exploring the thermal energy-induced microstructural expansion and contraction, which would change the structural curvature, and thus regulating the strain energy within the CTS. An analytical model on the strain energy evolution under thermal effects was established to predict the minimum stable shape transition paths, as well as to determine the critical boundary conditions for thermal driving. Both experiments and finite element model were then carried out to reveal underlying mechanisms. It is found that a CTS is able to be passively deployed under thermal energy, there is a minimum energy constraint to initiate the shape morphing process, and the critical boundaries are dependent on the thermal expansion of the structural material. These findings provide a novel low cost, simple and reversed smart morphing design principle of the CTS structure, enriching the theoretical analysis and deployable control of the bistable composites to benefit future deep space explorations.
Keyword ：
Bistable Bistable Composite Composite Mechanism Mechanism Strain energy Strain energy Thermal driving Thermal driving
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| GB/T 7714 | Peng, Yulin , Zhu, Juncheng , Wang, Bing et al. Passive thermal driving mechanics of a bistable composite tape-spring [J]. | THIN-WALLED STRUCTURES , 2025 , 210 . |
| MLA | Peng, Yulin et al. "Passive thermal driving mechanics of a bistable composite tape-spring" . | THIN-WALLED STRUCTURES 210 (2025) . |
| APA | Peng, Yulin , Zhu, Juncheng , Wang, Bing , Guan, Chenglong , Zhong, Jianfeng , Zhong, Shuncong . Passive thermal driving mechanics of a bistable composite tape-spring . | THIN-WALLED STRUCTURES , 2025 , 210 . |
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Metamaterials (MMs) have become increasingly prominent in terahertz flexible devices. However, bending deformation often alters the structure of the unit, which affects the response performance and stability of MMs. Here, a metal-aperture metamaterial (MA-MM) utilizing the strong coupling effect induced by two resonance modes is innovatively proposed to address the mentioned limitations. Specifically, it is found that the coupling state between multiple resonance modes remains consistent at different bending angles. Under these circumstances, the generated Rabi splitting peak presents stable response performance even under low resonance intensity caused by excessive deformation. The experimental results demonstrate that despite the amplitude of two resonant peaks decreasing significantly by 87.6%, the Q-factor of the Rabi splitting only reduced by 14.8%. Furthermore, armed with the response mode of the Rabi splitting being unaffected by plasma excitation range, the designed MA-MMs are able to maintain constant Q-factors and frequencies on curved surfaces of varying sizes. These findings exhibit the characteristics of electromagnetic response for multi-mode resonance-coupled MAMMs on different curved surfaces, presenting a novel design approach for terahertz flexible functional devices. (c) 2024 Chinese Laser Press
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| GB/T 7714 | Zeng, Qiuming , Shi, Tingting , Huang, Yi et al. Freestanding metamaterial with constant coupling response for terahertz flexible functional devices [J]. | PHOTONICS RESEARCH , 2025 , 13 (1) . |
| MLA | Zeng, Qiuming et al. "Freestanding metamaterial with constant coupling response for terahertz flexible functional devices" . | PHOTONICS RESEARCH 13 . 1 (2025) . |
| APA | Zeng, Qiuming , Shi, Tingting , Huang, Yi , Zhong, Shuncong , Sun, Fuwei , Guan, Chenglong et al. Freestanding metamaterial with constant coupling response for terahertz flexible functional devices . | PHOTONICS RESEARCH , 2025 , 13 (1) . |
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The composite segmented tools, used as the internal mandrel, are crucial in the integrated curing process of aerospace composite tanks. Their precise manufacturing demands stringent curing process requirements. Current studies lack reports on the curing simulation and process optimization of the segmented tools, making it challenging to provide effective guidance for the high-quality manufacturing of aerospace composite tanks. This study focuses on the composite segmented tools for a Phi 3.35 m liquid oxygen tank. The curing kinetics equations and thermophysical properties of T800/epoxy composites were tested and fitted. Finite element prediction models for the temperature and deformation evolution during the curing process were constructed. Based on the orthogonal experimental design, the curing parameters were optimized, and an engineering trial of the composite panel was completed. The results indicate that the heating rate has the most significant impact on the curing deformation of segmented tools, while the curing temperature has the greatest effect on curing uniformity. Under the optimized process parameters, the curing deformation of the composite panel obtained by the finite element model only has a 6.67% error compared to the experimental results, which not only validates the accuracy of the simulation models but also achieves precise manufacturing of the composite segmented tools.
Keyword ：
aerospace composite tank aerospace composite tank curing deformation simulation curing deformation simulation process optimization process optimization segmented tools segmented tools
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| GB/T 7714 | Zhan, Lihua , Yao, Shunming , Guan, Chenglong et al. Curing simulation and experimental analysis of composite segmented tools for aerospace applications [J]. | POLYMER COMPOSITES , 2025 . |
| MLA | Zhan, Lihua et al. "Curing simulation and experimental analysis of composite segmented tools for aerospace applications" . | POLYMER COMPOSITES (2025) . |
| APA | Zhan, Lihua , Yao, Shunming , Guan, Chenglong , Zhang, Dechao , Wang, Bing , Zhong, Shuncong . Curing simulation and experimental analysis of composite segmented tools for aerospace applications . | POLYMER COMPOSITES , 2025 . |
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Bistable composite cylindrical structures have been developed over the last four decades, and show great potential for shape morphing applications, especially in aerospace. Their bistabilities are known to be induced by unsymmetric composite layups, while the governing factors on shape geometries and viscoelastic mechanics remain an enigma. Here, we investigated the intricate relationship between structural geometry and stable mechanics of a bistable unsymmetric composite cylindrical structure. A polylactic acid (PLA)-based carbon composite laminate was prepared through 3D printing, which released design freedom on structural fiber volume fraction that could be controlled by modulating hatch spacing between the composite yarns. This strategic adjustment allowed the regulation of grid density, hence the in-plane stress level, which dominates the bistable geometries. The cylindrical composite samples were produced with hatch spacing changed from 1.25 to 5 mm, corresponding to a fiber volume fraction ranged from 24.2% to 6.6%, where the structural curvature was also changed by up to 50% difference and gradually became viscoelastic dependent. It is found that the internal stress difference in thickness direction dominates the structural bistability, and there is a threshold value on the stress difference magnitude to essentially maintain the bistable configurations. These findings are expected to facilitate reversed structural design and manufacturing of the bistable cylindrical shells with tailorable stability, and promote their viscoelastic-based large shape morphing fatigue life predictions.Highlights Bistable composite cylindrical shells were produced with various grid density. A theoretical model was established to predict the time-dependent bistability. Stress difference in thickness direction dominates the structural curvature. Stress contour reveals the viscoelastic-dependent bistable mechanics.
Keyword ：
analytical modeling analytical modeling multifunctional composites multifunctional composites residual/internal stress residual/internal stress viscoelastic mechanics viscoelastic mechanics
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| GB/T 7714 | Wang, Bing , Ye, Junjie , Zhang, Shunnan et al. Viscoelastic mechanics of a bistable composite cylindrical structure [J]. | POLYMER COMPOSITES , 2025 . |
| MLA | Wang, Bing et al. "Viscoelastic mechanics of a bistable composite cylindrical structure" . | POLYMER COMPOSITES (2025) . |
| APA | Wang, Bing , Ye, Junjie , Zhang, Shunnan , Guan, Chenglong , Zhong, Jianfeng , Zhong, Shuncong . Viscoelastic mechanics of a bistable composite cylindrical structure . | POLYMER COMPOSITES , 2025 . |
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The rapid development of aerospace technology has continuously promoted the demand for lightweight and systematic design of twisting structures, where advanced composites have drawn great expectations. A double helical structure has been developed to introduce large axial twistable capability, where thin-walled cured composite strips with a longitudinal curvature were prestressed or flattened to be employed as shape-changing units, and then assembled by using rigid spokes, pins, or webs; however, its twisting performance would be susceptible to thermal effects, and affected by the curvature variations induced by flattening and assembling of the precured curved strips. Here, we proposed a novel double helical structural design, where thin-walled curved tapes with transverse curvature were applied as the shape-changing units without prestressing. The double helical structures were produced and investigated with isotropic transverse curved tapes, orthotropic flat strips, as well as orthotropic transverse curved tapes, in order to reveal its geometric curvature effects-induced twisting mechanics. An inextensible shell model was formulated to analyse the shape-changing process, and expose the regulating mechanisms on structural stability. Experiments and finite element analysis were carried out to investigate the material and geometric curvature dependencies. It is found that the material orthotropy contributes to the bistability of the helical structure; geometric curvature promotes the stiffness and shape-changing stability of the double helix. The twisting mechanisms were then concluded in detail. These findings are expected to facilitate torsional structural design and application of deployable composite structures for aerospace engineering.
Keyword ：
Composite Composite Helical Helical Mechanics Mechanics Structure Structure Twisting Twisting
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| GB/T 7714 | Wang, Bing , Xu, Biao , Zhao, Chenmin et al. Geometric curvature effects-induced twisting mechanics of a double helical structure [J]. | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES , 2025 , 315 . |
| MLA | Wang, Bing et al. "Geometric curvature effects-induced twisting mechanics of a double helical structure" . | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 315 (2025) . |
| APA | Wang, Bing , Xu, Biao , Zhao, Chenmin , Chen, Xiayu , Guan, Chenglong , Zhong, Jianfeng et al. Geometric curvature effects-induced twisting mechanics of a double helical structure . | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES , 2025 , 315 . |
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The vibration pretreatment-microwave curing process is an efficient, low energy consumption, and high-quality out-of-autoclave curing process for carbon fiber resin matrix composites. This study aims to investigate the impact of vibration pretreatment temperature on the fiber weight content, microscopic morphology and mechanical properties of the composite laminates by using optical digital microscopy, universal tensile testing machine and thermogravimetric analyzer. Additionally, the combined mode of Bragg fiber grating sensor and temperature measurement fiber was employed to explore the effect of vibration pretreatment on the strain process during microwave curing. The study results revealed that the change in vibration pretreatment temperature had a slight impact on the fiber weight content when the vibration acceleration remained constant. The metallographic and interlaminar strength of the specimen formed at a vibration pretreatment temperature of 80 °C demonstrated a porosity of 0.414% and a 10.69% decrease in interlaminar shear strength compared to autoclave curing. Moreover, the introduction of the vibration energy field during the microwave curing process led to a significant reduction in residual strain in both the 0° and 90° fiber directions, when the laminate was cooled to 60 °. (Figure presented.) © Central South University 2024.
Keyword ：
curing strain curing strain interlaminar shear strength interlaminar shear strength microwave curing microwave curing porosity porosity thermo-gravimetric analysis thermo-gravimetric analysis vibration vibration
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| GB/T 7714 | Zhang, D.-C. , Zhan, L.-H. , Ma, B.-L. et al. Experimental investigation of vibration pretreatment-microwave curing process for carbon fiber reinforced resin matrix composites; [碳纤维增强树脂基复合材料振动预处理-微波固化工艺的实验研究] [J]. | Journal of Central South University , 2024 , 31 (6) : 1838-1855 . |
| MLA | Zhang, D.-C. et al. "Experimental investigation of vibration pretreatment-microwave curing process for carbon fiber reinforced resin matrix composites; [碳纤维增强树脂基复合材料振动预处理-微波固化工艺的实验研究]" . | Journal of Central South University 31 . 6 (2024) : 1838-1855 . |
| APA | Zhang, D.-C. , Zhan, L.-H. , Ma, B.-L. , Yao, S.-M. , Guo, J.-Z. , Guan, C.-L. et al. Experimental investigation of vibration pretreatment-microwave curing process for carbon fiber reinforced resin matrix composites; [碳纤维增强树脂基复合材料振动预处理-微波固化工艺的实验研究] . | Journal of Central South University , 2024 , 31 (6) , 1838-1855 . |
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The elastic fiber prestressing (EFP) technique has been developed to balance the thermal residual stress generated during curing of a polymeric composite, where continuous fibers were prestretched under either constant stress or constant strain throughout the curing process. The tension was only removed after the resin was fully cured. It has been demonstrated that EFP is able to enhance the shear properties of the composite, while the underlying mechanics is still unknown. Here, we investigated the multiscale shear failure mechanisms induced by the EFP within a carbon composite. A bespoke biaxial fiber prestressing rig was developed to apply biaxial tension to a plain-weave carbon prepreg, where the constant strain-based EFP method was employed to produce prestrained composites with different prestrain levels. Effects of EFP on macro-scale shear failure were subsequently characterized through mechanical tests and micro-morphological analysis. Both the micro- and meso-scale representative volume element (RVE) finite element models were established and experimentally verified. These were then employed to reveal the underlying stress evolution mechanics induced by EFP. It is found that EFP would improve the shear performance of a composite by enhancing the fiber/matrix interfacial bonding strength. This attributes to the elastic strain recoveries of the prestrained fibers locked within a polymeric composite, which generate compressive stresses to counterbalance the external loading. The multiscale shear failure mechanisms were then proposed. These findings are expected to facilitate structural design and application of the EFP for aerospace composites.Highlights Biaxial tension is applied to produce prestrained woven composite. Prestrain effects on microstructural stress evolution mechanics are revealed. Multiscale shear failure mechanisms are proposed for prestrained composites. Prestrain effects on microstructural stress evolution mechanics within a woven composite. image
Keyword ：
composite composite mechanism mechanism multiscale multiscale prestrain prestrain shear failure shear failure
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| GB/T 7714 | Zhao, Chenmin , Wang, Bing , Guan, Chenglong et al. Multiscale shear failure mechanisms within a prestrained composite [J]. | POLYMER COMPOSITES , 2024 , 46 (2) : 1442-1453 . |
| MLA | Zhao, Chenmin et al. "Multiscale shear failure mechanisms within a prestrained composite" . | POLYMER COMPOSITES 46 . 2 (2024) : 1442-1453 . |
| APA | Zhao, Chenmin , Wang, Bing , Guan, Chenglong , Jiang, Shihan , Zhong, Jianfeng , Zhong, Shuncong . Multiscale shear failure mechanisms within a prestrained composite . | POLYMER COMPOSITES , 2024 , 46 (2) , 1442-1453 . |
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A bistable composite tape-spring (CTS) is a thin-walled open slit tube, which can be coiled or folded into two stable configurations. The CTS has been applied to roll-out-solar-array and successfully launched to space station and micro-satellites based on their one-time deployment performance. There is growing interest on CTS to be applied in reversible deployable structures and foldable mechanical hinges; however, its high-cycle fatigue under large shape folding is still unknown. Here, we device a novel folding fatigue setup to investigate the foldingunfolding cyclic behaviour of the CTS. This is achieved by using a bespoke folding fatigue rig, where both the tape ends of the CTS were clamped separately on rotatable shafts to enable folding under cyclic axial displacements. Since stress concentration is more significant in the snapping fold region, analysis is focused on the peak fatigue stress. It is found that the folding peak stress decreases with the folding cycle: although progressive local damage is observed during 3000 to 100,000 cycles, the CTS is still functional and tends to be stablised after 300,000 folding cycles. The Basquin's law is applied to predict the fatigue life of the CTS, indicating a fatigue life of 1.4E11 folding cycles with a 40% decrease in peak folding stress. These findings are expected to facilitate the structural designs and applications of the CTS to flexible composite hinges.
Keyword ：
Bistable Bistable Composite Composite Folding fatigue Folding fatigue Functional Functional Structural Structural
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| GB/T 7714 | Chen, Xiayu , Du, Dongmei , Wang, Bing et al. High-cycle folding fatigue mechanics of a bistable composite tape-spring [J]. | MATERIALS LETTERS , 2024 , 368 . |
| MLA | Chen, Xiayu et al. "High-cycle folding fatigue mechanics of a bistable composite tape-spring" . | MATERIALS LETTERS 368 (2024) . |
| APA | Chen, Xiayu , Du, Dongmei , Wang, Bing , Jiang, Shihan , Guan, Chenglong , Zhong, Shuncong . High-cycle folding fatigue mechanics of a bistable composite tape-spring . | MATERIALS LETTERS , 2024 , 368 . |
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The vibration pretreatment-microwave curing process is an efficient, low energy consumption, and high-quality out-of-autoclave curing process for carbon fiber resin matrix composites. This study aims to investigate the impact of vibration pretreatment temperature on the fiber weight content, microscopic morphology and mechanical properties of the composite laminates by using optical digital microscopy, universal tensile testing machine and thermogravimetric analyzer. Additionally, the combined mode of Bragg fiber grating sensor and temperature measurement fiber was employed to explore the effect of vibration pretreatment on the strain process during microwave curing. The study results revealed that the change in vibration pretreatment temperature had a slight impact on the fiber weight content when the vibration acceleration remained constant. The metallographic and interlaminar strength of the specimen formed at a vibration pretreatment temperature of 80 degrees C demonstrated a porosity of 0.414% and a 10.69% decrease in interlaminar shear strength compared to autoclave curing. Moreover, the introduction of the vibration energy field during the microwave curing process led to a significant reduction in residual strain in both the 0 degrees and 90 degrees fiber directions, when the laminate was cooled to 60 degree celsius.
Keyword ：
curing strain curing strain interlaminar shear strength interlaminar shear strength microwave curing microwave curing porosity porosity thermo-gravimetric analysis thermo-gravimetric analysis vibration vibration
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| GB/T 7714 | Zhang, De-chao , Zhan, Li-hua , Ma, Bo-lin et al. Experimental investigation of vibration pretreatment-microwave curing process for carbon fiber reinforced resin matrix composites [J]. | JOURNAL OF CENTRAL SOUTH UNIVERSITY , 2024 , 31 (6) : 1838-1855 . |
| MLA | Zhang, De-chao et al. "Experimental investigation of vibration pretreatment-microwave curing process for carbon fiber reinforced resin matrix composites" . | JOURNAL OF CENTRAL SOUTH UNIVERSITY 31 . 6 (2024) : 1838-1855 . |
| APA | Zhang, De-chao , Zhan, Li-hua , Ma, Bo-lin , Yao, Shun-ming , Guo, Jin-zhan , Guan, Cheng-long et al. Experimental investigation of vibration pretreatment-microwave curing process for carbon fiber reinforced resin matrix composites . | JOURNAL OF CENTRAL SOUTH UNIVERSITY , 2024 , 31 (6) , 1838-1855 . |
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Reducing structural weight and improving the efficiency of the structure are the eternal themes of the spacecraft. The cryogenic tank accounts for more than 60% of the dry weight of the whole vehicle, which directly determines the overall lightweight level of the vehicle. Compared with metal tanks, carbon fiber reinforced resin matrix composite tanks could achieve a structural weight reduction of more than 20%, which is the key to improve the efficiency of transportation and lead the upgrade of the aerospace industry. In this paper, aiming at the problems of unknown deformation/performance evolution law and difficult determination of process parameters in the curing process of composite tank under the constraints of large size and complex structure, the variations of thermophysical parameters of aerospace composite materials with temperature and curing degree is found out, and the simulation prediction models of temperature field and deformation field in the whole curing process of components is established. The effective prediction of the deformation and quality of tank wallboard is realized, which provides theoretical and methodological support for the high-quality forming of aerospace composite components.
Keyword ：
Composite cryogenic tank Composite cryogenic tank Deformation-performance synergetic manufacturing Deformation-performance synergetic manufacturing Finite element simulation Finite element simulation
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| GB/T 7714 | Guan, Chenglong , Chen, Junhao , Zhan, Lihua et al. Simulation Analysis for Deformation and Performance Evolution of Aerospace Composite Tank During Curing Process [J]. | PROCEEDINGS OF THE 2024 3RD INTERNATIONAL SYMPOSIUM ON INTELLIGENT UNMANNED SYSTEMS AND ARTIFICIAL INTELLIGENCE, SIUSAI 2024 , 2024 : 210-215 . |
| MLA | Guan, Chenglong et al. "Simulation Analysis for Deformation and Performance Evolution of Aerospace Composite Tank During Curing Process" . | PROCEEDINGS OF THE 2024 3RD INTERNATIONAL SYMPOSIUM ON INTELLIGENT UNMANNED SYSTEMS AND ARTIFICIAL INTELLIGENCE, SIUSAI 2024 (2024) : 210-215 . |
| APA | Guan, Chenglong , Chen, Junhao , Zhan, Lihua , Chi, Tongming , Wang, Bing , Zhong, Shuncong . Simulation Analysis for Deformation and Performance Evolution of Aerospace Composite Tank During Curing Process . | PROCEEDINGS OF THE 2024 3RD INTERNATIONAL SYMPOSIUM ON INTELLIGENT UNMANNED SYSTEMS AND ARTIFICIAL INTELLIGENCE, SIUSAI 2024 , 2024 , 210-215 . |
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