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However, because of the mismatch coefficients of thermal expansion for thin film and substrate materials, residual strain is developed when the ambient temperature is changed.
Both materials were modeled as linear elastic with element type of SOLID45 and element size of 10µm.
Material ImperfectionMaterial imperfection is realized by introducing orthotropic coefficient of thermal expansion for Al thin film.
Acknowledgments This research was sponsored by the National Natural Science Foundation of China (NO. 90407020).
Bright: Journal of Microelectromechanical Systems, Vol.11 (2002) No.4, pp.372.

Preparation of TiO2 Films on Quartz Glass Plate and Its Study of Photocatalytic Properties in Ultrasound Ping Zhanga, Haifeng Yang, Shiwei Lin ,Yang Caob * and Feng Wen 1Key Laboratory of Ministry of Education for Application Technology of Chemical Materials in Hainan Superior Resources,Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources ,Materials and Chemical Engineering Institute of Hainan University, Haikou, Hainan Province, 570228, PR China azss122766@163.com, bcaowanghui@yahoo.com.cn Keywords: ultrasound, TiO2 film, degradation, methyl orange Abstract.
In recent years,ultrasound-driven technology was also applied in water treatment because it is possible to induce chemical modification on various materials and improve the activity into a photocatalytic reaction [5-8].The aim of this work was to investigate the abality of TiO2 thin films with or wihtout ultrasonic vibrations to treat MO solution.
Materials and methods Materials.
Acknowledgements This work was supported by Higher Education Foundation of Education Department of Hainan Province(Hjkj2010-11), International S&T Cooperation Program of China(2009DFA92550), National Natural Science Foundation of China(51062002), Hainan University Major Project(Hd09xm22) and Higher Education Foundation of Education Department of Hainan Province (Hjkj2011-01).
[5] Lan Suna, Jing Li, Journal of Hazardous Materials.171(2009)1045-1050 [6]Guo B ,Liu Z ,Hong L ,et al .

The main starting materials for the synthesis were Dy2O3,Eu2O3 (99.99%, National Engeering Research Central of Rare Earth Metallutgy and Function Materals), Mn(OOCCH3)2·4H2O, Zn(OOCCH3)2·2H2O and HNO3 (A.
Tompa, Flat panel display materials, in: R.
[4] Yufeng Liu, Zhiping Yang , Quanmao Yu ,XuLi , Yanmin Yang , Panlai Li: Materials Letters Vol65 (2011), p.1956 [5] Y.
Huang: Journal of Alloys and Compounds Vol455(2008), p.420 [6] P.L.
Mennig ,K.Ba¨rner :Materials Science and Engineering B.Vol64 (1999), p.73 [16] C.C.

The third stage is the final forging stage, using the head of the pits, make full of stem, excrescent material discharged into flash chamfer.
Finite Element Model is Established Blank materials brand AISI-1055 [800-1200˚C], young's modulus Y = 29987.1MPa, Poisson's ratio 0.3.
Materials use rigid visco-plastic flow stress model.
Beijing: Science Press, 1982.
Journal of Plasticity Engineering, 2005, 12(1): 58-63.

Introduction Nowadays magnesium alloy is one of the lightest structural materials widely used in aeronautic, automobile, electronics and communications industries, which has good performance, such as low density, high specific bending strength and modulus, good eliminating shaking ability and excellent cutting machining properties[1,2].
Material and experimental The investigation has been carried out on the AZ80 magnesium alloy.
The accumulation of lattice defects in the material during deformation process exerts a considerable influence on structure formation.
References [1] Shi Changxu, Li Hengde, and Wang Dianzuo: Materials Review, Vol, 15(2001), p. 526-531 [2] Mordike B L, Ebert T: Mater.
A302(2001), p. 37-45 [3] Pan Fusheng, Han Enhou: Processing Technology of High-Performance Wrought Magnesium Alloy( Chinese Science Press, Beijing 2007)

Material is proportional to the drying rate and drying temperature, the higher the temperature the faster drying, it does not affect the quality of materials in the premise, as far as possible to improve the drying temperature.
Materials and methods 2.1 Test material The test sample used for the production region of Hubei Province in late Luotian chestnut.
The Drying temperature was higher, or the drying time was longer, the moisture content decreased more quickly; the size of chestnut was larger, the moisture content decreased more slowly. 2）The significant difference of drying between chestnut and other materials was that chestnut would be easily browning when it dried at 75～100. 3）The average drying speed of chestnut reached the maximum value at 85. 4）The mathematical model of chestnut drying:Y=49.02-1.19X1+1.59X2+0.53X3-0.95X1X2 5）The range of safe drying temperature of chestnut was about 0～65; but chestnut would not immediately become metamorphism at above 65, only if it had experienced some time. 6）There was a maximum value of drying speed in each drying temperature.
JOURNAL OF FUJIAN COLLEGE OF FORESTRY,2001,21(3):276～278
Science and Technology of Food Industry,2000,21(2):8～10 [4] Prussia S E.

Table 1 Material Properties NO.
By selecting 25 point stress and strain, it is found in the same strain conditions, the simulation results with the actual results of the stress maximum difference 3.89MPa, the smallest difference 0.22MPa, mainly by the following reasons: 1, the simulation of the physical and mechanical properties of materials parameters data lack of preparation; 2, meshing precision effects: the simulation model selected by modeling a relatively coarse grid through trials, parameters and loading conditions to understand what results will produce responses in order to clearly understand the structure of the nonlinear behavior of expression.
Main reason may be not prepared before the test TC4 alloy material's physical and mechanical properties is not comprehensive enough, Mises yield criterion (von Misses) is set rough and so on.
Chinese Journal of Nonferrous Metals, 2010,20(1):67-71
[2] Cheng Donghai,Huang Ji Hua,Zhang Hua．Super-plastic deformation of laser welded Ti-6Al-4V sheet[J].Materials Science and Technology,2010,26(4):457-460.

Simultaneous Improvement of Mechanical Properties and Thermal Stability of Polyurethane by Polyethylene Glycol Grafted Cellulose Nanocrystals Zhen-Jun DOU1,a, Miao CHENG1,b, Yun-Feng QIN1,c, Long CHEN1,d, Zong-Yi QIN1,e 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, and College of Material Science and Engineering, Donghua University, Shanghai 201620, China a406074875@qq.com, bchengmiao91@126.com, cqinyunfeng2010@sina.com, dhappyjack@dhu.edu.cn, ephqin@dhu.edu.cn Keywords: Polyurethane, Cellulose Nanocrystals, Polyethylene Glycol, Nanocomposite.
Experimental Materials Commercial microcrystalline celluloses as raw materials for extracting cellulose nanocrystals were purchased from Shanghai Chemical Reagents (Shanghai, China).
All the materials and reagents were used as received without further purification.
Oréfice: European Polymer Journal Vol. 49 (2013) P. 3761

Experimental procedure The material used in this study is Esshete 1250 pipe.
Using these parameters, the model provides an adequate description of the real elasto-plastic material behavior.
Inactive elements have been activated initially to simulate the addition of filler material.
During the thermal analysis, the temperature and the temperature-dependent material properties change very rapidly.
Smith, Measurement of the residual stresses in a stainless steel pipe girth weld containing long and short repairs, International Journal of Pressure Vessels and Piping 82 (2005) 299-310 [2] STYLE Deliverable report D-2.2.1: Weld Residual Stress Simulation, 2014 [3] Zhibo Dong, Yanhong Wei, Yanli Xu, Predicting weld solidification cracks in multipass welds of SUS310 stainless steel, Computational Materials Science 38 (2006) 459-466 [4] M.

In the existing literature, the main researches on the failures of clamp used for aerospace focus on materials technology, structure and static strength calculation[1,2,3,4].The research of the analysis on dynamic strength is yet to see.
Metal Materials and Metallurgy Engineering.39(2011) 12-14
Ordnance Material Science and Engineering, 32(2009) 84-86
Applied Mechanics and Materials.456(2014) 567-570
Journal of materials engineering and performance.22(2013) 926-935