Ultralight, Superelastic, and Washable Nanofibrous Sponges with Rigid-Flexible Coupling Architecture Enable Reusable Warmth Retention

Nano Letters ◽  
2022 ◽  
Author(s):  
Hongyan Wu ◽  
Hang Cai ◽  
Shichao Zhang ◽  
Jianyong Yu ◽  
Bin Ding
Keyword(s):  
Flexible Coupling ◽  
Warmth Retention

Stretchable and resilient fibrous sponges tailored by interlocking double-network for warmth retention

2021 ◽  
pp. 100788
Author(s):  
Zuobao Zheng ◽  
Hongyan Wu ◽  
Yang Si ◽  
Yongtang Jia ◽  
Bin Ding
Keyword(s):  
Double Network ◽  
Warmth Retention

The Research of Warmth Retention Property of Non-Woven Wadding

2011 ◽  
Vol 197-198 ◽  
pp. 1708-1711
Author(s):  
Cheng Qian
Keyword(s):  
Heat Loss ◽  
Air Permeability ◽  
Loss Reduction ◽  
Warmth Retention

Nowadays in the market, there are many kinds of warm retention materials. Although each material has its own heat loss reduction, there should be methods for evaluating the warmth properties and giving out reliable results. In this paper, the warmth retention properties of three typical non-woven wadding were studied. On the basis of four warming related tests and analyses, the conclusions were got that after filming, because of existence of motionless air, their warmth retention properties increase obviously. In the same time, the air permeability of the three non-woven wadding decrease clearly because of the film on the wadding surface which obstructs air from flowing easily.

Analysis of Drive Shaft Speed Variations in a Scotch Yoke Mechanism

1982 ◽  
Vol 104 (1) ◽  
pp. 239-246 ◽  
Author(s):  
J. L. Wiederrich
Keyword(s):  
Practical Importance ◽  
Drive Shaft ◽  
Constant Speed ◽  
Shaft Speed ◽  
Flexible Coupling ◽  
Harmonic Content ◽  
Common Drive ◽  
Scotch Yoke Mechanism

Two analyses are presented for determining the drive shaft speed variations in a scotch yoke mechanism. The first analysis determines the speed variations when the mechanism is rigidly connected to a motor having a quadratic speed versus torque characteristic. The second analysis determines the speed variations when the mechanism is connected to a constant speed source through a flexible coupling. Together these models represent the two most common drive configurations. The results are of practical importance since they can be used in the preliminary calculations necessary in either the design of a main drive or the diagnosis of a drive problem in an existing machine. The methods are also of theoretical importance since they may be extended to the analysis of mechanisms having a greater harmonic content than the simple scotch yoke mechanism.

Reliability Study of Thin Seam Hearer Cutting Unit under Multi-Condition

2011 ◽  
Vol 199-200 ◽  
pp. 591-596 ◽  
Author(s):  
Li Juan Zhao ◽  
Zhong Gang Sun
Keyword(s):  
Mechanical Properties ◽  
Model Simulation ◽  
Comprehensive Analysis ◽  
Weak Links ◽  
Prototype Model ◽  
Simulation Environment ◽  
Reliability Study ◽  
Flexible Coupling ◽  
Thin Seam ◽  
Cutting Unit

Application of a variety of software construct co-simulation environment, establishment of model of thin seam shearer cutting unit rigid-flexible coupling multimode system, do correctness verification to model from speed characteristics and mechanical properties. Simulation by loading, get characteristics of principal stress and weak links of key parts. Compared to the prototype model simulation under multi-condition, got the best traction speed of shearer when working in a particular coal seam. Axis of the planet given to different materials to comparative simulation and comprehensive analysis, given the best materials of planetary shaft should be selected, improved the reliability of planetary axis under poor conditions.

Dynamic Characteristic Analysis of Irregularity under Turnout by Vehicle-Turnout Rigid-Flexible Coupling Model

2014 ◽  
Vol 945-949 ◽  
pp. 591-595 ◽  
Author(s):  
Meng Chen ◽  
Yan Yun Luo ◽  
Bin Zhang
Keyword(s):  
Finite Element ◽  
Longitudinal Direction ◽  
Element Model ◽  
Vertical Displacement ◽  
Coupling Model ◽  
Interaction Force ◽  
Vertical Acceleration ◽  
Characteristic Analysis ◽  
Flexible Coupling ◽  
Multi Body

Finite element model of track in frog zone is built by vehicle-turnout system dynamics. Considering variation of rail section and elastic support, bending deformation of turnout sleeper, spacer block and sharing pad effects, the track integral rigidity distribution in longitudinal direction is calculated in the model. Vehicle-turnout rigid-flexible coupling model is built by finite element method (FEM), multi-body system (MBS) dynamics and Hertz contact theory. With the regularity solution that different stiffness is applied for rubber pad under sharing pad of different turnout sleeper zone, analysis the variation of vertical acceleration of bogie and wheelset, rail vertical displacement and wheel-rail interaction force, this paper proves that setting reasonable rubber pad stiffness is an efficient method to solve rigidity irregularity problem.

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