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Effects of Geometric Misalignment Caused by Girth Weld on Fatigue Behavior of a Cylindrical Pressure Vessel Musharaf Abbas1,a, Rehan Qayyume1,b, Jamal Hussain Afridi1,c 1School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics No. 37 Xueyuan Road, Beijing100191, China .ametabbas@gmail.com, , brehan.qayyume@live.com, cjamalafridi10@hotmail.com Key words: Pressure vessel; Misalignment; Fatigue life; Finite element analysis Abstract.
Beden et al presented the fatigue life assessment of shell structure of different materials with application of measured variable amplitude loading [5].
Material of the vessel is steel 1025.
Journal of Pressure Vessels and Piping (2010)
[11] American Society for Materials: Fatigue and Fracture, ASM Metals Handbook Vol.19, 1998.

They also renewable and sustainable materials.
Materials and Methods Materials.
Bakar, Kenaf fiber reinforced composites: A review, Materials & Design 32(8-9) (2011) 4107-4121
Hinrichsen, Biofibres, biodegradable polymers and biocomposites: An overview, Macromolecular materials and Engineering 276(1) (2000) 1-24
Ellis, Performance of pineapple leaf fiber–natural rubber composites: the effect of fiber surface treatments, Journal of Applied Polymer Science 102(2) (2006) 1974-1984

Preparation and Properties of Sulphoaluminate Cementitious Materialswith Low Alkalinity Xiaobo Yan1,a Lingchao Lu1,b * Chenchen Gong1,c and Shoude Wang1,d 1Shandong provincial key laboratory of preparation and measurement of building materials, University of Jinan, Jinan 250022, China ayyxxbb@126.com, bmse_lulc@ujn.edu.cn, cmse_gongcc@ujn.edu.cn, dmse_wangsd@ujn.edu.cn *corresponding author：Lingchao Lu Keywords: Low alkalinity, Anhydrite, Sulphoaluminate cement clinker Abstract.
Experimental program Raw materials.
Acknowledgments This work is supported by the “973” National Key Fundamental Research Plan of China (No.2009CB623101) and National Natural Science Foundation of China (No.51072070).
Vol. 40 (2010), p. 1290 [8] Z.L.Meng, Z.B.Wu: Journal of Chongqing University.

The shape retention was studied by different concentrations of tackifier content.A reference value for the subsequent study of the mechanical properties of composite materials was provided. 2.
Materials and experimental methods 2.1 Materials The experimental research is designed to characterize the influence of the different concentrations of tackifier content on perform shape retention behavior.
EST321 tackifier was developed by Beijing Institute of Aeronautical Materials.
Application to the double dome benchmark, Journal of Materials Processing Technology,Volume 210, Issue 2, 19 January 2010, Pages 378-388 [2] J.
James Lee ,Tackification of Textile Fiber Preforms in Resin Transfer Molding, Journal of Composite Materials, Vol. 35, No. 21, 1954-1981

"Calculations of the Room-Temperature Shapes of Unsymmetric Laminates" Journal of Composite Materials, Vol.15 (1981), p.296 [2] Gigliotti M., Wisnom M.R., Potter K.D.
"Process Modelling of Composite Materials: Residual Stress Development during Cure.
Part II: Experimental Validation" Journal of Composite Materials, Vol.26 (1992), p.2423 [5] Sarrazin H., Kim B., Ahn S.H., Springer G.S.
"Effects of Processing Temperature and Lay-up on Springback" Journal of Composite Materials, Vol.10 (1995), p.1278 [6] Tarsha-Kurdi K.E., Olivier P.
C. et Ahn, K., Development of the transient simulated laminate (TSL) methodology for moisture ingression studies using unsymmetric laminates, Journal of Composite Materials, Vol. 34 (2000), p.1998 [8] Carslaw H.S., Jaeger J.C.

In this paper, abandoned flax fibers were adopted as reinforcing materials, polyurethane particles were adopted as matrix materials.
Scholars devote to exploring abandoned textile materials’ recycle problems.
These can be used as waterproof materials and construction materials[14].
Experiment Raw materials.
Journal of applied polymer Science 2001; 80 :1013- 1020

Fatigue life is one of the most important physical characteristic that is investigated by materials engineers and scientists.
Introduction Magnetorheological materials belong to a family of so-called smart materials whose rheological properties can be controlled rapidly and reversibly by the application of an external magnetic field.
Since their discovery in 1948 [1], magnetorheological materials have attracted intense interest.
Stenberg, Improving the magnetorheological effect in isotropic magnetorheological rubber materials, Polymer Testing 22 (2003), 677–680 [4] W.
Large elastic deformations of isotropic materials, IX: The deformation of thin shells, F.R.S., 244 (1952), 505-531 [14] D.

Introduction Nowadays, the main goals of the nanostructured materials science are developing the technologies of receiving the nanomaterials and forming nanocrystalline structures (NCS) with specific physico-mechanical properties.
Kyryliv, Improvement of the wear resistance of medium–carbon steel by nanodispersion of surface layers, Materials Science. 48 (2012) 119-123
[6] Kyryliv V.I., Chaikovs’kyi B.P., Maksymiv O.V., Shal’ko A.V., Contact fatigue of 20KHN3A steel with surface nanostructure, Materials Science, 51 (2016) 833–838
[7] Nykyforchyn H.M., Lunarska E., Kyryliv V.І., Maksymiv О.V., Hydrogen permeability of the surface nanocrystalline structures of carbon steel, Materials Science. 50 (2015) 698-705
[13] Berezhnitskaya M.F., Gritsishin P.M., Formation of residual stresses in surface layers by combined treatment, Soviet materials science transl. of Fiziko-khimicheskaya mekhanika materialov. 25 (1989) 95-96

Study on nitridation behavior of Mg-Ca alloy under Nitrogen Xiaoxia Yang1,a, Dunqiang Tan1,b, Dongfei Xiao1,c, Yijie Zhan1,d 1School of Materials Science and Engineering, Nanchang University,Nanchang 330031, China ayilan_2010@126.com,bcntdunqiang@yahoo.com.cn, cxiaodongfei898@tom.com,dzhanyijie666@126.com Keywords: Mg-Ca alloy; Spray deposition; Surface film; Nitridation behavior Abstract.
References [1] Hairong Luo,Hua Cui,Yongbing Li,et al:Materials Review,2006,20(8),p.119 (In Chinese) [2] S.K.
Panigrahi: Journal of Materials Processing Technology,2007,182: 343–351 [3] C.Y.
Chen, Chi Y.A.Tsao: Materials Science and Engineering A,2004,383：21-29 [4] M.
Proceeding of the fifth Asian foundry congress, 1997 [5]M.Sakamoto, S.Akiyama, K.Ogi: Journal of materials science letters,16(1997):1048-1050 [6] Xiaofeng Huang, Hong Zhou, Zhenming He: Rare Metal Materials and Engineering, 2002,3: 221-224(In Chinese) [7] Jianfeng Fan,Gencang Yang,Suling Cheng,et al:The Chinese Journal of Nonferrous Metals,14 (2004) :1667-1670.

Since cement-based materials are considerably used in constructions, determination of thermal conductivity of these materials is of great importance.
In a theoretical study, proposed to represent complex materials as composites made of materials perfectly represented by one of the four following models: series, parallel, One-dimensional heat flow and Maxwell’s model.
[3] ASTM D3171 Standard Test Methods for Constituent Content of Composite Materials: American Society for the Testing of Materials (2011)
Cleland, Thermal conductivity bounds for isotropic, porous materials.
Construction and Building Materials 23 (2009) 2487-2491