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学者姓名：王冰
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Abstract ：
A bistable composite tape-spring (CTS) structure is stable in both extended and coiled configurations, which can be fully coiled or folded. Its bistable coiling feature has been employed in a Roll-Out Solar Array and successfully deployed in space; its foldable characteristics is analogous to a flexible mechanical hinge, showing great potential to be applied in an aircraft landing gear. Both the structural coiling and folding mechanics are dependent on tape geometry; whilst the correlated scale effect has not been investigated, which significantly constrains its foldable mechanical hinge designs and smart driving analysis in order to further reduce weight and complexity for conventional mechanical hinges. Here, we studied the folding stability mechanics of the CTS structure towards its full tape-length range, where novel stress and shape transitional mechanisms are revealed. This is achieved by investigating the quasi-static folding process of the CTS, where new stable shape features in terms of critical transitional length and stable folded angle are observed and identified through experimental observations, finite element model, as well as theoretical analysis. Theoretical criteria were then determined from the strain energy analysis in comparison to the predefined folded tape shape features. The folding stability mechanisms towards its full tape-length range were proposed in order to facilitate customized flexible hinge design and in-situ smart driving analysis in order to replace conventional mechanical hinges.
Keyword ：
Composite Composite Folding Folding Mechanism Mechanism Stability Stability Tape-spring Tape-spring
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| GB/T 7714 | Chen, Hui , Wang, Bing , Lin, Xueqi et al. Folding mechanics of a bistable composite tape-spring for flexible mechanical hinge [J]. | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES , 2024 , 272 . |
| MLA | Chen, Hui et al. "Folding mechanics of a bistable composite tape-spring for flexible mechanical hinge" . | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES 272 (2024) . |
| APA | Chen, Hui , Wang, Bing , Lin, Xueqi , Seffen, Keith A. , Zhong, Shuncong . Folding mechanics of a bistable composite tape-spring for flexible mechanical hinge . | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES , 2024 , 272 . |
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Abstract ：
Space deployable structures are able to be deployed from a folded state to a predetermined or desired configuration. They are superior in terms of spatial packaging ratio, controllability, and structural complexity, in order to solve the space limitations for aerospace vehicles. Therefore, they have been applied in structural designs and concepts for various aerospace missions, including space support booms, space deployable antennas, solar panels, as well as flexible solar sails. Recent development of advanced manufacturing technologies and applications of novel smart materials and structures, brings new degree of design freedom to space deployable mechanics, inspiring novel space deployable mechanisms, especially for smart driving and control strategies. Here, we present a review on development of mechanics and smart driving of space deployable structures. Advantages and limitations for various deployable mechanisms are also presented to reveal further insights. The trends and future deployable mechanics are directed by further advancements in terms of modularisation, intelligences, and deployment precision. Multi-disciplinary cross-integrations are leading the way for future breakthroughs in novel deployable mechanics and intelligent driving control for space explorations.
Keyword ：
Deployable Deployable Driving Driving Mechanics Mechanics Smart Smart Structure Structure
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| GB/T 7714 | Wang, Bing , Zhu, Juncheng , Zhong, Shuncong et al. Space deployable mechanics: A review of structures and smart driving [J]. | MATERIALS & DESIGN , 2024 , 237 . |
| MLA | Wang, Bing et al. "Space deployable mechanics: A review of structures and smart driving" . | MATERIALS & DESIGN 237 (2024) . |
| APA | Wang, Bing , Zhu, Juncheng , Zhong, Shuncong , Liang, Wei , Guan, Chenglong . Space deployable mechanics: A review of structures and smart driving . | MATERIALS & DESIGN , 2024 , 237 . |
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Abstract ：
A composite tape-spring (CTS) structure is a thin-walled open slit tube with fibres oriented at +/- 45, which is stable in both extended and coiled configurations. The governing factors of its bistability include composite constitutive behaviour, initial geometrical proportions, and geometrically non-linear structural behaviour. Its bistable principle can be employed to produce a flexible multistable hinge structure with tailorable stability. This is achieved by introducing variable stiffness design within a cylindrical shell structure, where folding stability is dependent on central functional patch region, and then connected to linking ploy regions. Thus, a novel multistable composite hinge structure can be designed with positive Gaussian curvature deformation, and its multistability is highly tailorable: a lengthy one-dimensional mechanical arm can be designed to coil and fold multiple times to enable large folding ratio. An analytical model was established based on the strain energy principle, in order to determine effects from functional tape length; the typical structural stability and stable configurations were then predicted with respect to regional length of the functional layer. It is found that the stability of a multistable composite hinge structure is dependent on geometry and combination of both the functional patch region, and connecting ploy region; the stable criteria are then proposed and show good agreement with experimental observations and FE analysis. These enrich the diversities of functional deployable structures to benefit novel requirements for various deployable mechanisms, and enable customised design, as well as smart driving for flexible and multifunctional mechanical composite hinge applications.
Keyword ：
Composite Composite Hinge Hinge Mechanics Mechanics Multistable Multistable
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| GB/T 7714 | Zhao, Chenmin , Lin, Xinyu , Wang, Bing et al. A multistable composite hinge structure [J]. | THIN-WALLED STRUCTURES , 2024 , 198 . |
| MLA | Zhao, Chenmin et al. "A multistable composite hinge structure" . | THIN-WALLED STRUCTURES 198 (2024) . |
| APA | Zhao, Chenmin , Lin, Xinyu , Wang, Bing , Zhu, Juncheng , Guan, Chenglong , Zhong, Shuncong . A multistable composite hinge structure . | THIN-WALLED STRUCTURES , 2024 , 198 . |
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Polymers and composites have been widely applied in many industries, especially in aerospace. There are growing demands for understanding their natural viscoelastic performance, especially in aerospace applications, where precise dimensional control and prediction of the residual strength and modulus are vital for the success of an aerospace vehicle. The existing superposition principles mainly focus on the well-known WLF-based horizontal shift to predict the long-term behaviour through short-term experimental tests in terms of creep or stress relaxation. Whilst the intrinsic microstructural changes or damages within a polymeric material due to viscoelastic deformation are not considered, which may lead to large differences for long-term predictions. Here, we look into the very fundamentals of the existing superposition principles, aiming to develop towards a unified theory to better predict the long-term relaxation modulus or creep of a polymeric solid. This is achieved by considering both the free volume theory-based horizontal shift factors and activation energy-based shift factors; microstructural changes or damages induced vertical shift factors are then coupled to improve the prediction accuracy of the superposition methods. These will facilitate long-term predictions and accelerated aging tests for viscoelastic solids. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.
Keyword ：
Accelerated Aging Accelerated Aging Arrhenius Arrhenius Shift Factor Shift Factor Superposition Principle Superposition Principle WLF Equation WLF Equation
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| GB/T 7714 | Chen, X. , Wang, B. , Zhao, C. et al. Towards a Unified Theory on the Superposition Principles [未知]. |
| MLA | Chen, X. et al. "Towards a Unified Theory on the Superposition Principles" [未知]. |
| APA | Chen, X. , Wang, B. , Zhao, C. , Du, D. , Guan, C. , Zhong, S. . Towards a Unified Theory on the Superposition Principles [未知]. |
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Abstract ：
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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A bistable composite cylindrical shell is a thin-walled structure that can change shape between two stable configurations under small energy input, showing great potential to be applied to space deployable mechanics. The internal stress level within a cylindrical shell plays a vital role in determining its morphing mechanics, whilst tailoring the internal stress is tricky for traditional composite manufacturing methods. In this paper, we devise a novel biaxial elastic fibre prestressing (EFP) method to systematic design and produce prestrained carbon-based composite cylindrical shells, with tailorable bistability and morphing mechanics, as well as improved loadcarrying capabilities. A biaxial fibre stretching rig was devised to apply tensions on both directions of a plainweave carbon prepreg simultaneously; prestrained cylindrical shell samples were produced with various prestrain levels to fully evaluate the fibre prestraining effects; a finite element model was established and showed good agreement with experimental observations. The fibre prestraining mechanisms were then proposed. It is found that EFP is effective in tailoring the internal strain/stress level within a composite cylindrical shell, which in turn altering the structural morphing mechanics, and able to significantly lower the maximum tensile strain during shape-changing, thus improve the load-carrying capability. These findings are expected to facilitate structural design of the deployable composite structures and flexible mechanical hinges, by allowing further design freedoms in terms of morphing mechanics and load-carrying capability.
Keyword ：
Bistable composite Bistable composite Morphing mechanics Morphing mechanics Prestress Prestress Residual/internal stress Residual/internal stress Strain Strain
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| GB/T 7714 | Zhao, Chenmin , Wang, Bing , Chen, Xiayu et al. On tailoring morphing mechanics of a bistable composite cylindrical shell through elastic fibre prestressing [J]. | THIN-WALLED STRUCTURES , 2024 , 207 . |
| MLA | Zhao, Chenmin et al. "On tailoring morphing mechanics of a bistable composite cylindrical shell through elastic fibre prestressing" . | THIN-WALLED STRUCTURES 207 (2024) . |
| APA | Zhao, Chenmin , Wang, Bing , Chen, Xiayu , Guan, Chenglong , Zhong, Shuncong . On tailoring morphing mechanics of a bistable composite cylindrical shell through elastic fibre prestressing . | THIN-WALLED STRUCTURES , 2024 , 207 . |
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Thermal residual stress generated during curing is known to be detrimental to mechanical performance of a fibre reinforced composite. Elastic fibre prestressing has been developed to reduce the negative effects induced by the curing generated thermal residual stress, but the acting mechanisms of prestrain on dynamic interfacial strengthening within the composite is still unknown. In this paper, a bespoke fibre prestressing device was developed to apply biaxial stretching to a plain-weave carbon fibre reinforced epoxy prepreg with different prestrain levels. The effects of prestrain were then investigated by carrying out dynamic thermomechanical analysis. It is found that fibre prestraining is able to improve the fibre-matrix interface strength, and there is an optimal prestrain level to maximise the prestrain benefits. The prestrain mechanisms are then presented based on these observations. The prestrain composite can effectively improve its negative impact due to thermal residual stress, thereby improving its industrial applications.
Keyword ：
Interface Interface Mechanism Mechanism Prestrain Prestrain Thermodynamic Thermodynamic
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| GB/T 7714 | Zhao, Chenmin , Wang, Bing , Chen, Xiayu et al. Interfacial Strengthening Mechanics within a Prestrained Composite [J]. | PROCEEDINGS OF THE 2024 3RD INTERNATIONAL SYMPOSIUM ON INTELLIGENT UNMANNED SYSTEMS AND ARTIFICIAL INTELLIGENCE, SIUSAI 2024 , 2024 : 390-394 . |
| MLA | Zhao, Chenmin et al. "Interfacial Strengthening Mechanics within a Prestrained Composite" . | PROCEEDINGS OF THE 2024 3RD INTERNATIONAL SYMPOSIUM ON INTELLIGENT UNMANNED SYSTEMS AND ARTIFICIAL INTELLIGENCE, SIUSAI 2024 (2024) : 390-394 . |
| APA | Zhao, Chenmin , Wang, Bing , Chen, Xiayu , Guan, Chenglong , Zhong, Shuncong . Interfacial Strengthening Mechanics within a Prestrained Composite . | PROCEEDINGS OF THE 2024 3RD INTERNATIONAL SYMPOSIUM ON INTELLIGENT UNMANNED SYSTEMS AND ARTIFICIAL INTELLIGENCE, SIUSAI 2024 , 2024 , 390-394 . |
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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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Abstract ：
Composite structures have been widely applied in aerospace. Their dimensional geometries and residual strength predictions in service are critical to ensure structural integrity and safety for aerospace applications. Composites are known to show significant viscoelasticity. In this research, we have established a theoretical model and investigated the creep behaviour of a polymeric carbon composite. A Weibull distribution function was fitted to establish the master curve based on the superposition principles in order to construct explore the service-life prediction model. The time-temperature boundary of the composite was created to benefit long-term creep predictions of the aerospace composite.
Keyword ：
Arrhenius Arrhenius Superposition principle Superposition principle Time-Temperature boundary Time-Temperature boundary Weibull distribution function Weibull distribution function
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| GB/T 7714 | Chen, Xiayu , Wang, Bing , Zhao, Chenmin et al. Long-term Creep Prediction of a Carbon Composite [J]. | PROCEEDINGS OF THE 2024 3RD INTERNATIONAL SYMPOSIUM ON INTELLIGENT UNMANNED SYSTEMS AND ARTIFICIAL INTELLIGENCE, SIUSAI 2024 , 2024 : 395-398 . |
| MLA | Chen, Xiayu et al. "Long-term Creep Prediction of a Carbon Composite" . | PROCEEDINGS OF THE 2024 3RD INTERNATIONAL SYMPOSIUM ON INTELLIGENT UNMANNED SYSTEMS AND ARTIFICIAL INTELLIGENCE, SIUSAI 2024 (2024) : 395-398 . |
| APA | Chen, Xiayu , Wang, Bing , Zhao, Chenmin , Guan, Chenglong , Zhong, Shuncong . Long-term Creep Prediction of a Carbon Composite . | PROCEEDINGS OF THE 2024 3RD INTERNATIONAL SYMPOSIUM ON INTELLIGENT UNMANNED SYSTEMS AND ARTIFICIAL INTELLIGENCE, SIUSAI 2024 , 2024 , 395-398 . |
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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 . |
| MLA | Zhao, Chenmin et al. "Multiscale shear failure mechanisms within a prestrained composite" . | POLYMER COMPOSITES (2024) . |
| APA | Zhao, Chenmin , Wang, Bing , Guan, Chenglong , Jiang, Shihan , Zhong, Jianfeng , Zhong, Shuncong . Multiscale shear failure mechanisms within a prestrained composite . | POLYMER COMPOSITES , 2024 . |
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