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Figure 1.1 Film plate coupling three-dimensional model diagram Flexible membranous disc coupling material properties are shown as table 1.
Figure 3.1 The first principal stress nephogram Figure 3.2 Mises stress nephogram From The figure 3.1 and figure 3.2, it is known that In nominal working condition, The first principal stress maximum 295.342 MPa, mises stress maximum 251.601 MPa in film plate coupling, far less than film plate material allowable stress.
(2)0.8 mm film plate coupling the first principal stress and mises stress of static stress analysis have appeared on the plate, both value were 292.4 MPa and 295.2 MPa, plate and sleeve stress value are far less than material yield stress。
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (Grant No.51275081 ).
Mechanics performance study and optimization design of flexible membranous disc coupling [J]，Journal of southeast university，vol.23 No.6:135-138 [4]Hengjingwu，metal flexible membranous disc coupling application of aviation [J]，CSSA 2000-PH-032:164-167.

(2) From Eq.2, roll material tension T is also influenced by unwinding speed v1 and unwinding roll radius R.
So the tension of the roll material T is mainly controlled by unwinding speed v1. 2 Mathematical model and control strategy of unreeling tension system The specific relationship between speed and tension are analyzed by Hooke's law and we can get the formula as follows： (3) Here A is sectional area of thin film.
The most important thing to adjust the motor speed n precisely is to calculate the real-time radius R of the roll material.
Tension Control System for Spin-Draw-Winder Used in Vacuum Coating[J].Chinese Journal of Vacuum Science and Technology.2011,1(31):44-49
Huazhong University of Science and Technology,2004

Study on the Parametric Optimal Design of a Different-Speed Mixer Fan Zhimin1,a，Hu Weifei2,b，Choi Dong-Hoon2,c, Xu Jun1,d 1 College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, P.
Introduction The different-speed mixer is a new type and high efficiency and all phase double horizontal shaft mixer, which has strong ability of smashing and oneself cleaning and can well resolve the problem in the high viscosity material stirring and mixing[1].
(11) Fig.5 Differential element on the screw flight Fig.6 Force analysis of the screw flight The Figure 7 shows the expansion of the screw flights on different radius, there (12) (13) Fig. 7 Expansion of the screw flights on different radii Fig.8 Mechanics analysis of material element According equation（10）～（13）, we can get the torque on the main shaft and the clean axis.
The objective function is shown in the equation (18). 2.2 design variables and constraint conditions According to the actual conditions, the design variables were identified as R, r1, n1, θ1 and λ1, the constraint conditions are: a) R, r1 (19) (20) b) the maximum speed range is, (21) Thus, the restrain condition n 1 and R is (22) c) θ1 [7] (23) d) The length h of the screw flight (24) (25) e) λ1 (26) f) n1 The mechanics analysis of material element is shown in Fig. 8.
Journal of Qingdao University of Science and Technology, 2006, NO. p. 330-332

For example: concrete (7 including crack, spalling, corrosion etc.); steel (4 including corrosion and deformation etc.); timber (7 including shrinkage and splitting etc.); and other materials (3 including cracking, spalling, slitting etc.).
Such a selection is based on the fact that concrete is the most commonly used material in bridge structures; and there are 46 varieties of concrete materials used in bridge construction, constituting 40.7% of all material types.
Furthermore, cracking in concrete materials is one of the most common and significant types of defect in bridge structures because cracking causes, over time, serious surface deterioration and concrete spalling..
Types of deterioration for major bridge materials [8] Methodology Bridge elements exhibit different deterioration behaviour due to different material types and their surrounding environment [8].
Moore: Routine highway bridge inspection condition documentation accuracy and reliability, Journal of Bridge Engineering, Vol. 9(4) (2004), pp. 403–413

The greatest challenge in modelling of PAMs is their properties, especially the flexibility of materials used for their design and realization.
Boržíková, Operating modes of pneumatic artificial muscle actuator, Applied Mechanics and Materials 308 (2013) 39-44
Balara, The upgrade methods of the pneumatic actuator operation ability, Applied Mechanics and Materials 308 (2013) 63-68
Hošovský, Numerical approximation of static characteristic of PAM-based antagonic actuator, Journal of Applied Science in the Thermodynamics and Fluid Mechanics 1/1 (2007) 1-4
Mižáková, Electro-pneumatic robot actuator with artificial muscles and state feedback, Applied Mechanics and Materials 460 (2014) 23-31

Materials NR, EPDM(KEP-570P), HDPE(5000S), LDPE(2012TN26), LLDPE(7042) and PP(T30S) were commercial products.
Therefore, the FMR242 OMMT/natural rubber composite was more conducive to the preparation of nano-composite materials.
Polymer Materials Science ＆ Engineering. 32(2016)119-123
Composites Science and Technology. 139(2017)57-63
Journal of Hunan City University：Natural Science. 26(2017)76-78

However, drawback of thermal blending method is that it is difficult to elevate amount of ceramic particles in the composites and occurrence of a phase separation due to different wettabilities between two materials.
However, the reported process to make a composite is hard to get porous structure, which is required for growth of blood vessels into the material.
Materials and Methods 15CaO-85SiO2 (in mole ratio) particles were prepared by hydrolysis and condensation of tetraethyl orthosilicate (TEOS, Aldrich) in Ca(NO3)2·4H2O (Aldrich) and polyethylene glycol (PEG, Aldrich) in deionized water.
This composite showed bioactivity in SBF and it means it has a high potential to be used as a bone grafting material or a scaffold material for bone tissue engineering.
Clem: submitted to Journal of Materials Research (2003) [5] P.G.

The workpiece material is Q235 designated as plain carbon steel in Chinese standard.
ABAQUS provides a lot of material models, but it does not contain the stress-strain behavior of material in high temperature [4].
In order to improve the accuracy of simulation, the material is tested by the Gleeble-1500 thermo-mechanical tester to get the true stress-strain data, and then the VUMAT(User-defined Material Mechanical Behavior) programme is written to define material model.
Acknowledgements This work is financially supported by the Science and Technology Development Program of Shandong (Grant No. 2010GGX10421) and Program for New Century Excellent Talents in University (2007).
Im: Journal of Materials Processing Technology vol. 127 (2002), p. 57 [6] H.L.

Introduction Corrugated paperboard and honeycomb paperboard are the most widely used materials for transport package, assembly package and cushioning protection, they both belong to sandwich structure.
The second is the testing standards of sandwich structure, they can be applied to all of sandwich structure materials.
Material.
Carlsson: Fatigue & Fracture of Engineering Materials & Structures, Vol. 34 (2011), pp. 839-853
Ge: Journal of Beijing Institute of Light Industry, Vol. 19 (2001) No.1, pp.11-16 (in Chinese)

The chemical composition of raw materials is shown in Table 1.
Table 2 | Sludge incineration ash, clay, coal gangue mass ratio (%) Materials NO. sewage sludge incineration ash clay coal gangue 1 0 100 0 2 10 50 40 3 20 40 40 4 30 30 40 5 40 20 40 6 50 10 40 Results and Discussion Water absorption ratio and saturation coefficient.
Journal of Hazardous Materials, 2008, 160(2-3): 489 [2] Zhao M, Wu GB, Li G.
Environmental Science & Technology, 2005, 28(2):92 [3] Shih-Cheng Pan, Dyi-Hwa Tseng, Chih-Chiang Lee, Chau Lee.
Hydration characteristics of waste sludge ash utilized as raw cement material.