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学者姓名：杨庆生
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摘要 ：
Hydrogel is one of typical smart materials and has been used in many engineering applications, such as flexible electronics, flexible robots, and biomedical engineering. Modern industries with complex working environments require hydrogel to have higher strength without losing flexibility. Many published experimental studies focus on the preparation technique of hydrogel composite with high strength and toughness. However, the theoretical investigation into the influence of entanglements on the hydrogel deformation is rarely reported for the structure analysis and deformation mechanism of hydrogel composite, as a purpose to design of hydrogel devices. In this paper, the constitutive model is developed for thermal responsive hydrogel with chain entanglements, based on Flory-Rehner theory and slip-link model, and numerically solved by a user subroutine in ABAQUS. The uniaxial tensile and compressive simulations of standard specimens are carried out to validate the proposed model and demonstrate the applicability of the hydrogel composite, in which a great agreement is obtained by comparing the simulation results to the experimental data from published work. Subsequently, the hydrogel composites with three types of structure, such as hydrogel grippers, scaffolds and skins, are designed to improve the overall strength and maintain the flexibility of the devices, inspired by the deformation mismatch characteristics of multilayer hydrogels. The results show that the properties of composite hydrogels are closely related to the level of entanglements, cross-link and composite structures. This work may contribute to the preparation of reinforced hydrogels and provide insights for the design of hydrogel multifunctional devices.
关键词 ：
mechanical properties mechanical properties composite structures composite structures finite element method finite element method chain entanglements chain entanglements Hydrogel Hydrogel
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| GB/T 7714 | Nian, Xiangchuan , Yang, Qingsheng , Ma, Lianhua et al. Constitutive modeling for hydrogel with chain entanglements and application to adaptive hydrogel composite structures [J]. | MECHANICS OF ADVANCED MATERIALS AND STRUCTURES , 2022 , 30 (24) : 5122-5136 . |
| MLA | Nian, Xiangchuan et al. "Constitutive modeling for hydrogel with chain entanglements and application to adaptive hydrogel composite structures" . | MECHANICS OF ADVANCED MATERIALS AND STRUCTURES 30 . 24 (2022) : 5122-5136 . |
| APA | Nian, Xiangchuan , Yang, Qingsheng , Ma, Lianhua , Zhang, Xingyu . Constitutive modeling for hydrogel with chain entanglements and application to adaptive hydrogel composite structures . | MECHANICS OF ADVANCED MATERIALS AND STRUCTURES , 2022 , 30 (24) , 5122-5136 . |
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摘要 ：
Metamaterial is a new type of structure constructed by artificially designed geometries and possessing extraordinary physical properties. However, the functions of metamaterial are currently difficult to be adjusted and switched. A novel type of multi-pattern composite metamaterial with tunable Poisson's ratio and band gap is designed and fabricated using shape memory polymers based on curved-beams. The effects of geometric parameters and temperature on pattern switching and vibration performance is investigated by using theoretical analysis, finite element simulation and experiments. Based on this new metamaterial, a bionic multi-degree-of freedom dexterous finger tube is designed and the major geometric parameters affecting its bending angle is investigated. The present intelligent regulation combining with the mechanical regulation provide a valuable contribution to the design of novel multifunctional tunable metamaterials, as well as further extending the applications in biomedical field.
关键词 ：
Multifunctional composites Multifunctional composites Vibration Vibration Smart materials Smart materials Shape memory behaviour Shape memory behaviour
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| GB/T 7714 | Wang, Jia-Xin , Liu, Xia , Yang, Qing-Sheng et al. A novel programmable composite metamaterial with tunable Poisson's ratio and bandgap based on multi-stable switching [J]. | COMPOSITES SCIENCE AND TECHNOLOGY , 2022 , 219 . |
| MLA | Wang, Jia-Xin et al. "A novel programmable composite metamaterial with tunable Poisson's ratio and bandgap based on multi-stable switching" . | COMPOSITES SCIENCE AND TECHNOLOGY 219 (2022) . |
| APA | Wang, Jia-Xin , Liu, Xia , Yang, Qing-Sheng , Tao, Ran , Li, Ying , Ma, Lian-Hua . A novel programmable composite metamaterial with tunable Poisson's ratio and bandgap based on multi-stable switching . | COMPOSITES SCIENCE AND TECHNOLOGY , 2022 , 219 . |
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摘要 ：
The structures evolved by creatures to adapt to the specific living environment have excellent mechanical properties. Studying from nature, we can get inspiration to design the structure with unparalleled mechanical properties. This paper proposed a new multi-bionic strategy, which combined the face centered cubic (FCC) structure with light weight and high specific strength and the concentric circle structure with high toughness. Those two structure were inspired by the arrangement of metal atoms and bone respectively. The multi-bionic metamaterials with different ratios of soft phase material were prepared by 3D printer. The force displacement curves of the metamaterials were obtained by quasi-static compression experiment, and compared with the lattice structure made of pure hard phase material. In addition, the failure behavior of the metamaterials and the effect of the concentric soft and hard rods on the toughness and energy absorption performance of the metamaterials were studied. Results show that for a metamaterial with soft phase ratio of 20%, the strain when rods begin to break and absorbed energy are 2 times and 3.8 times that of the pure hard phase lattice, respectively. The design strategy is not only limited to the combination of the two structures in this work, but can also guide the combination of more biological structures to optimize and customize the performance of metamaterials.
关键词 ：
Energy absorption Energy absorption Metamaterial Metamaterial Multi-bionic Multi-bionic Toughness Toughness
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| GB/T 7714 | Wei, Yu-Ling , Yang, Qing-Sheng , Liu, Xia et al. Multi-bionic mechanical metamaterials: A composite of FCC lattice and bone structures [J]. | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES , 2022 , 213 . |
| MLA | Wei, Yu-Ling et al. "Multi-bionic mechanical metamaterials: A composite of FCC lattice and bone structures" . | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES 213 (2022) . |
| APA | Wei, Yu-Ling , Yang, Qing-Sheng , Liu, Xia , Tao, Ran . Multi-bionic mechanical metamaterials: A composite of FCC lattice and bone structures . | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES , 2022 , 213 . |
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摘要 ：
Peridynamics (PD), as an alternative formulation of classical continuum mechanics, is a powerful method for predicting the spontaneous initiation and propagation of cracks. In this paper, a unified elasto-viscoplastic peridynamics model, named the Bodner-Partom theory-based Peridynamics (BPPD) model, is proposed to describe the whole deformation-damage-fracture process for both brittle and ductile materials under impact loadings. It defines the bond-wise elasto-viscoplastic deformation by incorporating the Bodner-Partom's (B-P) constitutive theory into the ordinary state-based PD framework. In BPPD model, the bond deterioration is introduced as an intrinsic variable coupled with the modified B-P theory and the bond fracture is realized by the critical bond stretch model. The proposed BPPD model permits the natural development of plastic deformation and material deterioration, which shares the same vision as PD theory. Equipped with the elastic short-range force contact model, the present study further investigates the modelling capacity of the BPPD model under various impact loadings. Simulations for brittle drop-ball test, Taylor impact test and ballistic penetration test show a good agreement between numerical results and experiment data. The proposed BPPD model can accu-rately capture the whole deformation processes of various impact fractures and thus contribute a new diversity to the development of PD theory and a new perspective to the understanding of material fracture mechanism.
关键词 ：
brittle fracture brittle fracture peridynamics peridynamics ductile fracture ductile fracture elasto-viscoplastic deformation elasto-viscoplastic deformation impact impact
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| GB/T 7714 | Zhang, Jing , Liu, Xia , Yang, Qing-sheng . A unified elasto-viscoplastic peridynamics model for brittle and ductile fractures under high-velocity impact loading [J]. | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2022 , 173 . |
| MLA | Zhang, Jing et al. "A unified elasto-viscoplastic peridynamics model for brittle and ductile fractures under high-velocity impact loading" . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 173 (2022) . |
| APA | Zhang, Jing , Liu, Xia , Yang, Qing-sheng . A unified elasto-viscoplastic peridynamics model for brittle and ductile fractures under high-velocity impact loading . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2022 , 173 . |
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摘要 ：
Stretchable strain sensors of conductive hydrogels have been widely used in wearable devices and soft robotics. These applications have posed combinational requirements for hydrogels: high fatigue resistance, low hysteresis, and high electrical sensitivity. This combination is hardly realized. Here we propose a composite design principle to fabricate conductive hydrogels with multiple outstanding properties in both mechanical and electrical tests. One phase of the composite hydrogel is a regular polyacrylamide (PAAm) hydrogel, and the other phase is a highly entangled conductive PAAm hydrogel. The topological polymer network of each hydrogel phase is tuned by changing the density of the crosslink and entanglement to achieve different mechanical properties. The composite hydrogel shows a high fatigue threshold (similar to 330 J m(-2)), low hysteresis (<3%), high resolution (1%), and wide range (0-200%) of strain sensing capabilities. In particular, hysteresis is one order of magnitude lower than that of reported conductive hydrogels and elastomers. These merits qualify the strain sensor for monitoring cyclic motion signals, such as bending of joints (fingers, wrists, elbows, and knees), moving of a robotic arm, and beating of a porcine heart in vitro. The resistance of the sensor changes accordingly with the beating of the heart for 500 cycles. This strain sensor of composite hydrogels with high fatigue resistance and low hysteresis may open new opportunities in stretchable electronics and soft robotics.
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| GB/T 7714 | Liu, Jinyuan , Chen, Xi , Sun, Bonan et al. Stretchable strain sensor of composite hydrogels with high fatigue resistance and low hysteresis [J]. | JOURNAL OF MATERIALS CHEMISTRY A , 2022 , 10 (48) : 25564-25574 . |
| MLA | Liu, Jinyuan et al. "Stretchable strain sensor of composite hydrogels with high fatigue resistance and low hysteresis" . | JOURNAL OF MATERIALS CHEMISTRY A 10 . 48 (2022) : 25564-25574 . |
| APA | Liu, Jinyuan , Chen, Xi , Sun, Bonan , Guo, Haoyu , Guo, Yuhan , Zhang, Shengyuan et al. Stretchable strain sensor of composite hydrogels with high fatigue resistance and low hysteresis . | JOURNAL OF MATERIALS CHEMISTRY A , 2022 , 10 (48) , 25564-25574 . |
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摘要 ：
本文利用ABAQUS有限元软件对薄壁圆筒在加工过程中的应力分布进行了分析。薄壁圆筒是一类专用设备的核心部件,属于各向异性结构,由于其刚度较小,在加工过程中容易出现变形较大、加工精度难以保证的情况,该案例的应力分布云图可以作为优化加工工艺的补充。
关键词 ：
有限元 有限元 薄壁圆筒 薄壁圆筒 切削力 切削力
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| GB/T 7714 | 单燕 , 杨庆生 , 尚军军 . 基于ABAQUS的薄壁圆筒有限元分析 [C] //北京力学会第二十七届学术年会论文集 . 2021 . |
| MLA | 单燕 et al. "基于ABAQUS的薄壁圆筒有限元分析" 北京力学会第二十七届学术年会论文集 . (2021) . |
| APA | 单燕 , 杨庆生 , 尚军军 . 基于ABAQUS的薄壁圆筒有限元分析 北京力学会第二十七届学术年会论文集 . (2021) . |
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摘要 ：
以某起重量为3t跨度为16.5m的单梁电动葫芦桥式起重机主梁为例,运用三维建模软件Solidworks建立主梁模型,再利用有限元分析软件ABAQUS进行计算、分析,对分析结果进行讨论并给出合理建议,为以后相近主梁结构设计给出合理建议。
关键词 ：
有限元分析 有限元分析 主梁设计 主梁设计
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| GB/T 7714 | 宗婷 , 刘夏 , 杨庆生 . 单梁桥式起重机主梁结构有限元分析 [C] //北京力学会第二十七届学术年会论文集 . 2021 . |
| MLA | 宗婷 et al. "单梁桥式起重机主梁结构有限元分析" 北京力学会第二十七届学术年会论文集 . (2021) . |
| APA | 宗婷 , 刘夏 , 杨庆生 . 单梁桥式起重机主梁结构有限元分析 北京力学会第二十七届学术年会论文集 . (2021) . |
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摘要 ：
碳纳米管纤维是由数以万计的碳纳米管及管束以近乎平行的方式堆叠排列而成,具有优异的力学性能。本文对碳纳米管纤维作为研究对象进行编织,制备人工肌肉,测试其在凝胶环境下的基本力学性能。
关键词 ：
电化学驱动 电化学驱动 碳纳米管纤维 碳纳米管纤维 人工肌肉 人工肌肉
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| GB/T 7714 | 刘博岩 , 刘夏 , 杨庆生 . 碳纳米管纤维驱动结构及其性能研究 [C] //北京力学会第二十七届学术年会论文集 . 2021 . |
| MLA | 刘博岩 et al. "碳纳米管纤维驱动结构及其性能研究" 北京力学会第二十七届学术年会论文集 . (2021) . |
| APA | 刘博岩 , 刘夏 , 杨庆生 . 碳纳米管纤维驱动结构及其性能研究 北京力学会第二十七届学术年会论文集 . (2021) . |
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摘要 ：
课程是体现"以学生发展为中心"理念的"最后一公里",是落实"立德树人"根本任务的具体体现,课程质量直接决定了人才培养质量。本文以基础力学课程的教学改革和实践为研究平台,探讨了基础力学课程育人体系建设的总体思路与课程思政实践情况,为专业基础课的课程思政建设提供了一些思路和借鉴。
关键词 ：
基础力学 基础力学 力学思维 力学思维 课程思政 课程思政 课程育人 课程育人
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| GB/T 7714 | 叶红玲 , 杨庆生 , 杜家政 . 基础力学课程育人体系建设的思考与实践 [C] //北京力学会第二十七届学术年会论文集 . 2021 . |
| MLA | 叶红玲 et al. "基础力学课程育人体系建设的思考与实践" 北京力学会第二十七届学术年会论文集 . (2021) . |
| APA | 叶红玲 , 杨庆生 , 杜家政 . 基础力学课程育人体系建设的思考与实践 北京力学会第二十七届学术年会论文集 . (2021) . |
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摘要 ：
碳纳米管纤维(CNTB)具有质量轻、强度高、导电率高等优点,是发展人工肌肉纤维的优选材料之一。纤维状的人工肌肉可由多种线性材料通过加捻、并股等工艺制备得到,具有驱动性能优异、结构柔软、易于编织等优点,在柔性机器人、智能穿戴等领域具有韭常重要的应用前景。本文将基于碳纳米管纤维多层级螺旋制备人工肌肉纤维,通过电化学驱动人工肌肉的运动,开发具有丰富运动形式的人工肌肉结构;组装成具有一定应用价值的器件。进一步推动纤维材料的发展和应用。
关键词 ：
结构设计 结构设计 机械爪 机械爪 碳纳米管纤维 碳纳米管纤维 人工肌肉 人工肌肉
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| GB/T 7714 | 季铧 , 刘夏 , 杨庆生 . 碳纳米管纤维人工肌肉的器件设计与应用 [C] //第十八届北方七省市区力学学会学术会议论文集 . 2021 . |
| MLA | 季铧 et al. "碳纳米管纤维人工肌肉的器件设计与应用" 第十八届北方七省市区力学学会学术会议论文集 . (2021) . |
| APA | 季铧 , 刘夏 , 杨庆生 . 碳纳米管纤维人工肌肉的器件设计与应用 第十八届北方七省市区力学学会学术会议论文集 . (2021) . |
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