Author
Daochun Li
Other affiliations: Cranfield University
Bio: Daochun Li is an academic researcher from Beihang University. The author has contributed to research in topics: Aerodynamics & Flapping. The author has an hindex of 15, co-authored 47 publications receiving 724 citations. Previous affiliations of Daochun Li include Cranfield University.
Topics: Aerodynamics, Flapping, Wing, Airfoil, Aeroelasticity
Papers
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TL;DR: It became apparent that the adoption of morphing concepts for routine use on aerial vehicles is still scarce, and some reasons holding back their integration for industrial use are given.
186 citations
TL;DR: In this paper, a review of the design, implementation, and demonstration of energy harvesting devices that exploit flow-induced vibrations as the main source of energy is presented, including limit cycle oscillations of plates and wing sections, vortex-induced and galloping oscillation of bluff bodies, and atmospheric turbulence and gusts.
122 citations
TL;DR: In this article, a state feedback suboptimal control law is derived for aeroelastic response and flutter suppression of a three degree-of-freedom typical airfoil section.
87 citations
TL;DR: In this paper, the authors investigated the design, theoretical study, numerical modelling and experiment of a novel flapping wing rotor for micro aerial vehicles (MAV). Attention was firstly focused on the design of a simple, reliable and lightweight configuration of the flappingwing structure and the rotor.
57 citations
TL;DR: In this paper, the authors proposed a new bionic bi-tubular thin-walled structure (BBTS) inspired from the internal structure of the lady beetle elytron.
Abstract: Thin-walled tubular structures are commonly used in automotive and aerospace applications because of their high strength and lightweight characteristics. In this paper we propose a new bionic bi-tubular thin-walled structure (BBTS) inspired from the internal structure of the lady beetle elytron. Six types of BBTSs with different geometric parameters and same type of material were simulated under axial dynamic impact loading with a weight of 500 kg and a velocity of 10 m/s using nonlinear finite elements. The comparison between BBTSs with equal mass shows that the thickness of the inner wall and the cross-sectional configurations influence significantly the energy absorption of the structure. BBTSs show an optimized crashworthiness behavior when the inner wall thickness is between 1.6 and 2.0 mm. In addition, circular and octangular BBTSs show improved absorption characteristics when the inner wall thickness is 2.0 mm. We also evaluate the energy absorption of periodically distributed BBTS against cellular configuration with irregular topology. The energy absorption characteristic of BBTS with regular distribution is better than that of BBTS with irregular distribution, which indicates that the optimized regular structure has an improved mechanical performance to the original bionic topology.
57 citations
Cited by
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TL;DR: A comprehensive review on the state-of-the-art of piezoelectric energy harvesting is presented, including basic fundamentals and configurations, materials and fabrication, performance enhancement mechanisms, applications, and future outlooks.
Abstract: The last decade has witnessed significant advances in energy harvesting technologies as a possible alternative to provide a continuous power supply for small, low-power devices in applications, such as wireless sensing, data transmission, actuation, and medical implants. Piezoelectric energy harvesting (PEH) has been a salient topic in the literature and has attracted widespread attention from researchers due to its advantages of simple architecture, high power density, and good scalability. This paper presents a comprehensive review on the state-of-the-art of piezoelectric energy harvesting. Various key aspects to improve the overall performance of a PEH device are discussed, including basic fundamentals and configurations, materials and fabrication, performance enhancement mechanisms, applications, and future outlooks.
513 citations
TL;DR: A comprehensive overview of recent advances in the development of bio-inspired structures for energy absorption applications is provided in this paper, where the authors describe the unique features and remarkable mechanical properties of biological structures such as plants and animals, which can be mimicked to design efficient energy absorbers.
Abstract: It is widely known that the availability of lightweight structures with excellent energy absorption capacity is essential for numerous engineering applications. Inspired by many biological structures in nature, bio-inspired structures have been proved to exhibit a significant improvement over conventional structures in energy absorption capacity. Therefore, use of the biomimetic approach for designing novel lightweight structures with excellent energy absorption capacity has been increasing in engineering fields in recent years. This paper provides a comprehensive overview of recent advances in the development of bio-inspired structures for energy absorption applications. In particular, we describe the unique features and remarkable mechanical properties of biological structures such as plants and animals, which can be mimicked to design efficient energy absorbers. Next, we review and discuss the structural designs as well as the energy absorption characteristics of current bio-inspired structures with different configurations and structures, including multi-cell tubes, frusta, sandwich panels, composite plates, honeycombs, foams, building structures and lattices. These materials have been used for bio-inspired structures, including but not limited to metals, polymers, fibre-reinforced composites, concrete and glass. We also discussed the manufacturing techniques of bio-inspired structures based on conventional methods, and adaptive manufacturing (3D printing). Finally, contemporary challenges and future directions for bio-inspired structures are presented. This synopsis provides a useful platform for researchers and engineers to create novel designs of bio-inspired structures for energy absorption applications.
424 citations
TL;DR: Recent literature in the field of energy harvesting from aeroelastic vibrations during the last few years is reviewed and Qualitative and quantitative comparisons between different existing flow-induced vibrations energy harvesters are discussed.
368 citations
TL;DR: In this paper, a review of 2D and 3D chiral mechanical metamaterials is presented, and their mechanical behaviors and deformation mechanisms can be investigated through equilibrium principle, strain energy analysis, micropolar elasticity and homogenization theories.
328 citations
TL;DR: In this paper, an experimental study of wind energy harvesting by self-sustained oscillations (flutter) of a flexible piezoelectric membrane fixed in a novel orientation called the "inverted flag" is presented.
304 citations