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Multi-feature bionic gradient hierarchical lattice metamaterials with ...
A multi-feature bionic design strategy is proposed, integrating the radial gradient hierarchy with alternating arrangements of incomplete and complete cells, to overcome the trade-off between the controllability of the crushing process and the mechanical properties of the checkerboard lattices.
Bionic Thermosensation Inspired Temperature Gradient Sensor …
To do so, COF-COOH/PAN was placed between the asymmetric NaCl aqueous solutions (0.5/0.01 M) to mimic the salinity gradient at a river mouth. Given that the concentration gradient and hot stimulation drive the ion transport in opposite directions, the temperature gradient was imposed on the low-salt concentration side.
Enhancement of flow boiling in the microchannel with a bionic gradient ...
A bionic gradient wetting surface is fabricated to overcome the disadvantages caused by inherent features of microchannel flow boiling (narrow space and expanding bubbles). The upstream region of the gradient wetting surface is set as a superhydrophobic surface, aiming to suppress backflow and promote disturbance.
Highly Sensitive Capacitive Pressure Sensors over a Wide …
Herein, we report a novel capacitive pressure sensor employing the hybrid piezoresistive and piezocapacitive responses of a highly porous nanocomposite (PNC) to attain high …
A Highly Sensitive Flexible Capacitive Pressure Sensor With …
A Highly Sensitive Flexible Capacitive Pressure Sensor With Wide Detection Range Based on Bionic Gradient Microstructures Abstract: Introducing microstructures into a flexible pressure sensor is an effective way to improve performance of the sensor. However, existing methods for preparing microstructures in sensors, such as the artificial ...
Bioinspired Engineering of Fillable Gradient Structure into …
The gradient ionic gel is applicated as a flexible capacitive pressure sensor, which exhibits high sensitivity of 1.09 kPa–1 (<100 kPa) and a broad sensing …
Advances in the enhancement of bionic fractal microchannel heat ...
This paper systematically classifies and summarizes the current state of research on the enhancement of heat transfer in microchannels with bionic fractal structure, including fractal structures such as leaf veins, tree branches, lung trachea, spider webs and other biomimetic microchannels. The fractal topology microchannels are also discussed …
Large-area, self-healing block copolymer membranes for energy …
Large-area, self-healing block copolymer membranes for ...
Bioinspired Engineering of Fillable Gradient Structure into …
The sensor can detect Morse code, robotic grabbing, and human motion monitoring. As a result, flexible sensors with a bionic fillable gradient structure pave the …
Investigation on crashworthiness and mechanism of a bionic …
The bionic-antler gradient structure produces many folds due to small folding wavelength, which expands the scope of energy storage area and improves the value of energy storage. Increasing properly the cell size-gradient or decreasing the average cell size can further enhance the crashworthiness performance of the bionic-antler gradient …
Highly Sensitive Capacitive Pressure Sensors over a Wide …
Low sensitivity at large pressure is a long-standing obstacle of capacitive pressure sensors. A novel soft capacitive pressure sensor that employs an electrically conductive porous nanocomposite is a...
Rapid Recovery Hydrogel Actuators in Air with Bionic Large …
Fast recovery in a nonaqueous environment is a big challenge for hydrogel actuators. In this work, a temperature-responsive hydrogel actuator with outstandingly rapid recovery in air was reported. The hydrogel with bionic large-ranged gradient structure was fabricated by copolymerization of hydrophilic monomer …
Bioinspired Engineering of Fillable Gradient Structure into …
The sensor can detect Morse code, robotic grabbing, and human motion monitoring. As a result, flexible sensors with a bionic fillable gradient structure pave the way for wearable …
Crashworthiness design of functional gradient bionic structures …
The bionic principle creates a new research direction for structural lightweighting and crashworthiness. Gradient structures are prevalent in nature, as shown in Fig. 1, the vascular bundles of bamboo [22], the leaf veins of giant lilies [23], the stems of horsetail grasses [24], and spongy (cancellous) bones [25] all have sparse and gradient …
Bionic intelligent soft actuators: high-strength gradient intelligent ...
The addition of NFC changed the gradient microstructure characteristics of NFC0 hydrogel, as shown in Fig. S2(b-1) (ESI†).The NFC content of 1 mg mL −1 compacted the network structure of Layer 1 in the NFC0 hydrogel. In addition, because of the micropore with a relatively small size on the bottom, the original gradient structure cannot be observed …
Progress on Bionic Textured Cutting Tools: A Review and Prospects
In the field of ultra-precision machining, Chen et al. [] designed a bionic micro-texture (BMT) with a directional cutting fluid delivery function based on the surface microstructure of the opening of the Nepenthes, which is composed of an array of micro-grooves and inclined circular pits.They tested it for directional fluid delivery up to a speed of 3.7 m/s.
5.12: Force Between the Plates of a Plane Parallel Plate Capacitor
Force Between the Plates of a Plane Parallel Plate Capacitor
A Highly Sensitive Flexible Capacitive Pressure Sensor With …
A Highly Sensitive Flexible Capacitive Pressure Sensor With Wide Detection Range Based on Bionic Gradient Microstructures
Frontiers | A highly sensitive flexible capacitive pressure sensor …
Specifically, the capacitive pressure sensor, featuring a dielectric layer thickness of 0.5 mm, exhibits a remarkable sensitivity of 0.77 kPa -1 within the pressure …
Highly sensitive flexible capacitive pressure sensor with a broad ...
In principle, the flexible capacitive pressure sensor is a type of traditional parallel plate capacitor, which has a high stability due to its sandwich structure, but its application is limited because of the lack of the sensitivity. ... Capacitive pressure sensor response at gradient pressures are collected and plotted in Fig. 3 d. The ...
Time-varying deposition strategy for comprehensive properties ...
2.1. Design of bionic bidirectional gradient. The bionic gradient design is applied to optimise material properties and functionally by mimicking the gradient structure of materials in nature, as for example the layered structures [Citation 39] and composition gradient structure [Citation 40, Citation 41] this work, a bionic bidirectional structure …
Experiment and numerical simulation study on the bionic tubes …
A class of bionic gradient thickness (BGT) tubes with 2 cross-sectional shapes (circle and rectangle) are proposed. The energy absorption and deformation modes of four thin-walled tubes, including a bionic circular tube (BCT), and a bionic rectangle tube (BRT) with gradient thickness, and the counterpart uniform-thickness (UT) tubes, namely …
Flexible Capacitive Pressure Sensor with High Sensitivity and …
Here, we designed a capacitive pressure sensor based on a bionic cheetah leg microstructure, validated the benefits of the bionic microstructure design, …
Hybrid method based energy management of electric vehicles …
Fig. 9 portray analysis the super capacitor voltage and current of drive cycle 1. Subplot 9(a) displays the super capacitor current the current value is vary amid −40 to 40 A at 0 to 1200 s. Subplot 9(b) shows the super capacitor voltage the voltage value is start from 260 V at 0 s then the slowly reduced to reach 160 V at 0 to 1100 s.
A highly sensitive flexible capacitive pressure sensor with ...
where ε 0 and ε r denote the dielectric constants of the vacuum and the dielectric layer. When a perpendicular pressure is exerted on the sensor, there will be a change in d, resulting in a modification of C nversely, A undergoes alteration when subjected to shear force (Zhao et al., 2015). By optimizing the microstructures of the …
A Highly Sensitive Flexible Capacitive Pressure Sensor With …
A Highly Sensitive Flexible Capacitive Pressure Sensor With Wide Detection Range Based on Bionic Gradient Microstructures @article{Zhang2023AHS, title={A Highly Sensitive Flexible Capacitive Pressure Sensor With Wide Detection Range Based on Bionic Gradient Microstructures}, author={Xuefeng Zhang and Dongrui Dang …
Chapter 5 Capacitance and Dielectrics
0 parallelplate Q A C |V| d ε == ∆ (5.2.4) Note that C depends only on the geometric factors A and d.The capacitance C increases linearly with the area A since for a given potential difference ∆V, a bigger plate can hold more charge. On the other hand, C is inversely proportional to d, the distance of separation because the smaller the value of d, the …
Microstructure and mechanical properties of Ti basic bionic gradient ...
In this study, a large size of Ti basic bionic gradient heterogeneous alloy component from Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (TC11) to Ti6Al4V (TC4) was designed by multi-wire arc additive manufacturing (MWAAM) technology, which aims at the practical application of compressor blades and discs of aeroengines in aerospace industry [23]. …
Time-varying deposition strategy for comprehensive properties ...
ABSTRACT. Inspired by the property mechanism principles of C. squamiferum (impact resistance) and bamboo (energy absorption), a bionic bidirectional gradient NiTi alloy was developed and fabricated by the innovative time-varying deposition strategy (TVDS), including different process parameters (the laser power and scanning …