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The maximum contact pressure which the material can support in the elastic range in steady state conditions is known as the ‘shakedown limit’.
An advanced cyclic plasticity model was implemented into a finite element code via the material subroutine.
The wheel and the rail have the same elastic material property in terms of Young’s modulus E1=210GPa and Poisson’s ratio v1=0.3, while lower elastic modulus E2=0.2E1 and same Poisson’s ratio v2=v1 is applied to the insulation material.
In all numerical simulations, the insulation material was assumed to be perfectly bonded with the rail ends.
Tan, X., and Bushan, B., 1996, A numerical three-dimensional model for the contact of rough surfaces by variational principle, Journal of Tribology, 33-42.

Nature Materials 8 (2009) 203-207
Materials Research Express 1 (2014) 025031
Advanced Functional Materials 22 (2012) 2123-2128
Materials Letters 64 (2010) 2180-2183
Nature Materials 10 (2011) 443-449

Optimization on Control Time Sequence of Double-pump Hydraulic System of Concrete Pump Haibo Xie1,a, Jian Chen1,b, Huayong Yang1,c, Zhibin Liu1,d, Yu Zhen2,e, Jin Zhang2,f, Jiaqian Wang2,g 1 The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, Zhejiang Province, China 2 Zoomlion Heavy Industry Science & Technology Development Co., Ltd., Changsha, Hunan Province , China ahbxie@zju.edu.cn, baaaachenjian@163.com, dlbaddie@zju.edu.cn, fzhangj@zlzk.com Keywords: concrete pump, hydraulic system, AMESim simulation, control time sequence Abstract.
He[[] He Shanghong Dynamic Simulation of Concrete-pump Hydraulic System[J] Journal of Changsha University of Science and Technology(Natural Science) 2004, Vol.1, No.1 ] used the Power Bond Graph to establish the simulation model of the hydraulic control system of single pump and analyzed the switching process of the system.
The same method was used by He[[] He Guohua, Hu Junke, Wang Qingbiao, Wu Shifei Research on the Reversing Impact of Main Pumping Loops of a Concrete Delivery Pump [J] MECHANICAL SCIENCE AND TECHNOLOGY 2006, Vol.25, No.9 ] and Fu[[] Fu Lei, Qu Fengzheng, Gao Shunde, Miao Yubin Digital simulation of concrete-pump hydraulic system [J] Journa l of Dalian University of Technology 2000, Vol.40, No.1 ] to analyze the impact pressure of the main pump.
Xie used AMESim to establish simulation model for the hydraulic system of the concrete pump and improve the pumping ability of the system[[] Haibo Xie, Shuyong Lin, Huayong Yang, Yu Zhen, Jin Zhang Research on the Dynamic Characteristics of Master Cylinder in the Hydraulic System on Concrete Pump [J] Advanced Materials Research Vols. 317-319 (2011) pp 2398-2403 ].
Acknowledgement The authors acknowledge the support of National Natural Science Foundation of China (Grant No.:51275451), Science Fund for Creative Research Groups of National Natural Science Foundation of China (Grant No.:51221004), Major State Basic Research Development Program of China (973 Program) (Grant No.: 2013CB035400), and National High Technology Research and Development Program of China (86 3Program) (Grant No.:2013AA040200).

Materials and Methods GNRs can be divided into armchair graphene nanoribbons (AGNRs) and zigzag graphene nanoribbons (ZGNRs).
Computational Materials Science 81 (2014): 348-52
Computational Materials Science 124 (2016): 142-50
International Journal of Damage Mechanics 28, no. 3 (2019): 325-45
Computational Materials Science 95 (2014): 84-88

Materials and methods Polymer composites.
General definition of composite materials is the heterogeneous materials consisted of two or more phases or systems in the macroscopic scale.
International Journal of Polymer Science [online]. 2011, vol. 2011, p. 1-35 [cit. 2012-05-18].
Rheology and processing of polymeric materials : Polymer rheology. vol. 1.
Mechanics and analysis of composite materials.

Incineration is used to get rid of plastic material and other organics to concentrate metal components, and oxidation is a subsequent process to remove all the remaining carbonate materials.
Hoffmann, Journal of Metal, 11 (1992) pp. 43-48
Wuth, Minerals Metals and Materials Society (TMS), EPD Congress (1997) p. 363
Gaskell: An Introduction to Transport phenomena in materials engineering (1997) pp. 146-147
Song: Metallurgical and Materials Transactions B vol. 33B (2002) p. 724.

The new method for material samples with low thermal conductivity has outstanding advantages and potential applications.
China (NIM) established an accurate and reliable material spectral emissivity measurement facility [1, 2] to satisfy the demand from science and industry.
This heating method is applicable to materials emissivity measurement with good thermal conductivity properties. 2.4 The principle and application of the new heating method- hot airflow heating As mentioned, for the low thermal conductivity material samples ,if we still use the heating block method, the uncertainty of the tested material emissivity measurements caused by temperature measurement will increase。
Theoretical analysis and experimental results show that hot airflow heating method has outstanding advantages to the samples with low thermal conductivity, such as various thermal insulation materials, although the preliminary experimental program and the level obtained now are still needed to be improved further.
Shanghai Traffic University Journal, 37, (2003) [6] J Ishii, N P Fox.

Compressive residual stress, which depends on preferred orientation [6], substrate material [7], the properties of interface layer [8], coating thickness [9] and deposition process [10], can reach values up to several GPa in TiN coatings, It is well known that compressive residual stress has beneficial effects on the fatigue life, crack propagation and stress corrosion of materials, whereas tensile residual stress reduces their performance capacity [11], but too high compressive stress may also cause coating delamination [12].
The variation of residual stress with coating thickness can be used in industry to instruct the material design.
Acknowledgements This research was funded by the National Natural Science Foundation of China under the contracts 50772089 and Project of Natural Science Foundation of Zhanjiang Normal University under the contracts ZL0903.
Wang: Chinese Journal of Mechanical Engineering Vol. 42(2006), p. 18(In Chinese) [3] J.H.
Lipinskaya: Strength of materials Vol. 33(2001), p. 344 [10] N.B.

Introduction ACF is a new type of efficient adsorption material developed in recent years.
Thus ACF has wide application prospects in air purification, water purification, solvent recovery, wastewater treatment, surgical dressing, protective materials, fruit and vegetable preservation, solar energy received, etc.
Usually it needs to be compounded with other materials to form new functional materials with high adsorption and certain mechanical strength [1].
Acknowledgements This work is supported by the Natural Science Research Project of Nantong University of China. (09Z015), its corresponding author is Yidan Zhou References [1] Xiaoyan Liu, Peng Xu: Wool Textile Journal, 2003(6), pp.55-57
[4] Tao Ji, Hancheng Wang, Qiang Gao, etc:Textile Science Research, Vol.13,No.4(2002), pp.38-42

Study on the Weldability and Metallurgical Structure of 15CrMoR Hu Xiaodong1, 2, Lv Jiantao1, Zhang Yong1, Zhang Sen1 Li Yajiang2 (1 College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266510, China) (2 Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials; Ministry of Education; Shandong University, Jinan 250061, China) huxdd@sohu.com, Yajli@sdu.edu.cn Keywords: 15CrMoR, welding, metallurgical structure, mechanical properties Abstract: The butt weld of 15CrMoR with the thickness of 55mm has been manufactured with the bonding methods of manual electric arc welding (SMAW) and submerged-arc welding (SAW), and the mechanical properties of which have been tested with the corresponding test, and the metallurgical structures have been analyzed with microscope.
The metallurgical structure of the steel material of 15CrMoR has been studied in this paper with the procedure of welding operating, mechanical properties tests and the microscope structure analysis.
The main objective of this paper is to study the relationships of mechanical properties and the microscope structure in the butt weld seam with the steel material of 15CrMoR.
Table 2 Welding parameters layer Welding Filling material Polarity Current (A) Arc voltage (V) Welding speed (m/h) Grades Diameter (mm) Positive layer 1 SMAW R307 Ø4 DC reverse 150-180 22-26 8-15 Positive layer 2-3 SMAW R307 Ø5 DC reverse 180-210 22-26 8-15 Remaining of positive SAW H13CrMoA+SJ110 Ø5 DC reverse 680-730 36-38 27-30 Remaining of back SAW H13CrMoA+SJ110 Ø5 DC reverse 680-730 36-38 27-30 Mechanical tests designed for the butt weld seam include tensile (room temperature tensile and high tensile), impact and bending test.
Journal of Xihua University (Natural Science Edition), 2006, (04), [4] Wang Huaijian, Li Lei.