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Jian LI, Likun GAO, Wentao GAN
《农业科学与工程前沿(英文)》 2017年 第4卷 第4期 页码 459-464 doi: 10.15302/J-FASE-2017178
关键词: bioinspired butterfly wings C/TiO2 photocatalyst visible light
Parametric computational study on butterfly-shaped hysteretic dampers
Ali Reza FARZAMPOUR, Matthew Roy EATHERTON
《结构与土木工程前沿(英文)》 2019年 第13卷 第5期 页码 1214-1226 doi: 10.1007/s11709-019-0550-6
关键词: structural fuse hysteretic damper finite element analysis energy dissipation initial imperfection butterfly-shaped links
基于Inverse Butterlfy网络的高效可重构循环移位单元 Article
Chao MA, Zi-bin DAI, Wei LI, Hai-juan ZANG
《信息与电子工程前沿(英文)》 2017年 第18卷 第11期 页码 1784-1794 doi: 10.1631/FITEE.1601265
Investigations on color variations of
Guanglan LIAO, Haibo ZUO, Xuan JIANG, Xuefeng YANG, Tielin SHI
《机械工程前沿(英文)》 2012年 第7卷 第4期 页码 394-400 doi: 10.1007/s11465-012-0347-y
Experiments and simulations are carried out to investigate the optical properties of butterfly wing scales. The upper surface of a male butterfly wing presents a single-layer of scales, the microstructures of which are responsible for the brilliant blue color. The color varies from cyan blue to yellow green and soon afterwards returns back to cyan blue when some ethanol is dropped on the upper surface. At the start of the ethanol volatilization process, the reflection spectrum remains stable. As the ethanol further volatilizes, the peak reflectance decreases slightly, then increases dramatically. Meanwhile, the peak wavelength keeps approximately constant, then decreases, and keeps almost stable at the end of the process. Therefore, the optical properties depend strongly on the varying ambient conditions, including the refractive index and the thickness of the packing medium. Moreover, the possible causes for the scales in dark green region after several dropping ethanol experiments are clarified. This research benefits our understanding of the color variation mechanisms of the wing scales, and provides inspiration for further studies and applications.
关键词:
Abdelwahhab KHATIR; Roberto CAPOZUCCA; Samir KHATIR; Erica MAGAGNINI
《结构与土木工程前沿(英文)》 2022年 第16卷 第8期 页码 976-989 doi: 10.1007/s11709-022-0840-2
关键词: damage prediction ANN BOA FEM experimental modal analysis
Stress induced polarization switching and coupled hysteretic dynamics in ferroelectric materials
Linxiang WANG, Roderick MELNIK, Fuzai LV
《机械工程前沿(英文)》 2011年 第6卷 第3期 页码 287-291 doi: 10.1007/s11465-011-0230-2
The dynamic responses of ferroelectric materials upon external mechanical and electrical stimulations are inherently nonlinear and coupled. In the current paper, a macroscopic differential model is constructed for the coupled hysteretic dynamics via modeling the orientation switching induced in the materials. A non-convex potential energy is constructed with both mechanic and electric field contributions. The governing equations are formulated as nonlinear ordinary differential equations by employing the Euler-Lagrange equation, and can be easily recast into a state space form. Hysteresis loops associated with stress induced polarization switching and butterfly-shaped behavior in ferroelectric materials are also successfully captured. The effects of mechanical loadings on the electrically induced switching are numerically investigated, as well as the mechanically-induced switching with various bias electric fields.
关键词: differential model state space electromechanical switching butterfly effects hysteresis
基于蝶翅三级微纳米结构的定制光子工程辐射制冷纺织品 Article
郭竑宇, 牛田野, 俞建勇, 王学利, 斯阳
《工程(英文)》 2023年 第31卷 第12期 页码 120-126 doi: 10.1016/j.eng.2023.07.019
通过将被动辐射制冷策略与个人热管理技术相结合,为缓解人体在户外活动中的热不适感提供了新的思路。然而,目前大多数被动辐射制冷材料在穿着舒适性和耐用性方面存在不足。本文采用微阵列技术,成功制备出了具有辐射制冷能力的定制光子工程可穿戴纺织品。所开发的辐射制冷纺织品(RCTs)具有一定的透气透湿性、结构稳定性和扩展光谱响应性(太阳光反射率91.7%、大气窗口发射率95.8%)。在正午炎热环境的室外降温测试中,RCTs所覆盖的皮肤模拟器温度比棉织物低4.4 ℃。这种仿生结构的开发为可穿戴、热湿舒适和结构稳定的辐射制冷纺织品在个人热管理领域的应用提供了新的见解。
标题 作者 时间 类型 操作
Parametric computational study on butterfly-shaped hysteretic dampers
Ali Reza FARZAMPOUR, Matthew Roy EATHERTON
期刊论文
Investigations on color variations of
Guanglan LIAO, Haibo ZUO, Xuan JIANG, Xuefeng YANG, Tielin SHI
期刊论文
Vibration-based crack prediction on a beam model using hybrid butterfly optimization algorithm with artificial
Abdelwahhab KHATIR; Roberto CAPOZUCCA; Samir KHATIR; Erica MAGAGNINI
期刊论文
Stress induced polarization switching and coupled hysteretic dynamics in ferroelectric materials
Linxiang WANG, Roderick MELNIK, Fuzai LV
期刊论文