Results 71 to 80 of about 2,244,717 (304)

Aerodynamic Optimization Based on Continuous Adjoint Method for a Flexible Wing

International Journal of Aerospace Engineering, 2016
Aerodynamic optimization based on continuous adjoint method for a flexible wing is developed using FORTRAN 90 in the present work. Aerostructural analysis is performed on the basis of high-fidelity models with Euler equations on the aerodynamic side and ...
Zhaoke Xu, Jian Xia
doaj   +1 more source

Effect of twist, camber and spanwise bending on the aerodynamic performance of flapping wings

Journal of Biomechanical Science and Engineering, 2018
Insect wings change its shape dynamically through the interactions of the structure, and the aerodynamic and inertial forces when flapping, which can greatly affect its aerodynamic performances.
Toshiyuki NAKATA, Ryusuke NODA, Hao LIU
doaj   +1 more source

Role of fluid-structure interaction in generating the characteristic tip path of a flapping flexible wing

Physical Review E, 2018
This study shows that characteristic modes, such as the figure-eight mode, can be created in the path of the wing tip, which is caused by the fluid-structure interaction, using a flapping model wing with two lumped flexibilities describing the elevation ...
D. Ishihara
semanticscholar   +1 more source

Biobased Bionic Spider Silk via Electrostatic Complexation for Simultaneously Harvesting Atmospheric Water and Triboelectric Energy

Advanced Functional Materials, EarlyView.
Bio‐based bionic spider silk and spider web are first prepared using polyelectrolyte complexation technique for the simultaneous harvesting of water and triboelectric energy. The advantage of this process lies on entirely bio‐based materials, fully green water‐processable procedures, extremely high production rate (99.36%), excellent fog harvesting ...
Qin Chen, Araz Rajabi‐Abhari, Tongtong Fu, Haonan Zhang, Siqi Huan, Liang Chen, Jinchao Li, Cheng Hao, Yaping Zhang, Ning Yan   +9 more
wiley   +1 more source

Aeroelastic characteristics of slender wing/bodies with freeplay non-linearities [PDF]

, 2011
This article presents a time domain approach to the flutter analysis of a missile-type wing/body configuration with concentrated structural non-linearities.
Arevalo Lozano, Felix, Garcia-Fogeda Nuñez, Pablo   +1 more
core   +2 more sources

Block Copolymers: Emerging Building Blocks for Additive Manufacturing

Advanced Functional Materials, EarlyView.
This review addresses how block copolymer (BCP) physics and rheology have led to the widespread use of BCPs in advanced additive manufacturing techniques, with particular emphasis on the untapped potential of these nanostructured materials toward achieving multi‐scale architected materials with unique, programmable material properties.
Alice S. Fergerson, Hemish B. Thakkar, Jiaen Wu, Emily C. Davidson   +3 more
wiley   +1 more source

Transonic calculations for a flexible supercritical wing and comparison with experiment [PDF]

Pressure data measured on the flexible DAST ARW-2 wing are compared with results calculated using the transonic small perturbation code XTRAN3S. A brief description of the analysis is given and a recently-developed grid coordinate transformation is ...
Bennett, R. M., Sandford, M. C., Seidel, D. A.   +2 more
core   +1 more source

Rainbow Photonic Crystals: Self‐Assembly of Carbohydrate Bottlebrushes Block Copolymers

Advanced Materials, EarlyView.
Full‐color reflective 1D photonic crystals, capable of a tunable, responsive, and reversible color with high repeatability, are created from the self‐assembly of carbohydrate‐based brush block copolymers (BR01‐04). Abstract Tunable and responsive photonic crystal systems are the subject of great research interest owing to their ability to actively ...
Hong Li, Muhammad Mumtaz, Takuya Isono, Toshifumi Satoh, Cheng‐Liang Liu, Wen‐Chang Chen, Redouane Borsali   +6 more
wiley   +1 more source

Boundary control for an unmanned aerial vehicle with a nonhomogeneous rigid–flexible coupling wing

工程科学学报
With the rapid development of unmanned aerial vehicle technology and the continuous growth of requirements demanded in engineering applications, flapping-wing unmanned aerial vehicles are playing an increasingly important role in the national economy and
Yun FU, Ao XIAO, Bei LIU, Yunjun YU, Yushui HUANG, Xiaofeng WAN   +5 more
doaj   +1 more source

Mode-Based Sensing and Actuation Techniques for Multi-Objective Flexible Aircraft Control [PDF]

Intelligent sensing and actuation designs are explored as a means to improve performance of a gust load alleviation control design for a flexible wing aircraft equipped with wing-shaping control surfaces. The proposed techniques rely on identification of
Alder, Andrew, Cramer, Nick, Hashemi, Kelley E., Nguyen, Nhan T.   +3 more
core   +1 more source