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Kurzydlowski Warsaw University of Technology, Faculty of Materials Science and Engineering, Woloska 141, 02507 Warsaw, Poland kjk@inmat.pw.edu.pl Keywords: composite modelling, polycrystalline metallic materials Abstract Grain boundaries significantly influence the properties of polycrystalline metallic materials, particularly with grain sizes in the nano-metre range.
Micro-macro modelling of the effects of the grain size distribution on the plastic flow stress of heterogeneous materials, Computational Materials Science Volume: 39, Issue: 1, March, (2007), 96-105 [5] Hae-Chang, C., Park, K.T.
Boundary strengthening in undeformed and deformed polycrystals, Materials Science & Engineering A Volume: 409, Issue: 1-2, November 15, (2005), 39-45 [9] Watanabe, I., Terada, K., de Souza Neto, E.A., Peric, D.
And Van der Giessen, E.: Discrete dislocation plasticity analysis of the grain size dependence of the flow strength of polycrystals, International Journal of Plasticity Volume: 24, Issue: 12, December, (2008), 2149-2172 [11] Martin, G. and Perrailon, B. in Grain Boundary Structure and Kinetics, ASM Materials Science Seminar, Milwaukee, (1979), 239 [12] ASM Handbook, volume 13 A, Corrosion: fundamentals, testing and protection, ASM International, 2003 [13] Nguyen-Manh, D., Vitek, V. and Horsfield, A.P.: Environmental dependence of bonding: A challenge for modelling of intermetallics and fusion materials, Progress in Materials Science 52, (2007), 255-298 [14] Sot, R., and Kurzydlowski, K.J.: Atomic modelling of point defects in B2-RuAl, Materials Science - Poland, 23, (2005), 407 - 411 [15] Muzyk, M. and Kurzydlowski, K.J.
Modelling the influence of the structure on the properties of nanometals, Computer Methods in Materials Science, Vol. 9, (2009), No. 1 [27] Dobosz, R.

The research of crack-tip field in damage materials is a very complex problem.
Bui and Ehrlachar present a simple damage model to study the fracture problem of elastic and elastic-plastic materials.
These works provide theoretical foundation to establish failure criterion for materials.
For the non-damage materials，则要求, they are requested, λ and μ are 为材料（无损伤时）的 Lame 系the Lamé coefficients of materials (no damage).
[4] Sun Q H, Cai Y H, Tang L Q: Journal of Harbin Engineering University, Vol.24 (2) (2003), p.192-197.

Composition and Microstructure of Cement-like Materials Synthesized by Solution Combustion Technique Oratai Jongprateep1, a Prawin Laomorakot1 and Krongkarn Sirinunwatana2 1Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Ngamwongwan Rd., Chatuchack, Bangkok, Thailand 2Department of Science Service, Faculty of Science, Ministry of Science and Technology, Rama VI Rd., Ratchathewi, Bangkok, Thailand afengotj@ku.ac.th Keywords: Ceramic processing, Cement, Combustion synthesis, Waste, Cockleshells, Rice husk ash Abstract.
Raw materials used in production of ordinary Portland cement mainly consist of limestone, shale, and clay.
Acknowledgement Equipment support from the Department of Materials Engineering, Faculty of Engineering, Kasetsart University, the Department of Physics, Faculty of Science, Kasetsart University and the Department of Science Service, Ministry to Science and Technology, Thailand are gratefully acknowledged.
Journal of Construction and Building Materials. 25: 798-805 [3] R.
Journal of Materials Characterization. 73: 89-95

Bahavior of Composite Materials to Withstand Impact and Compressive Design Allowables Zhen Shen1 Shengchun Yang1 Puhui Chen2 1 Aircraft Strength Research Institute of China, Xi'an, 710065 , China 2 Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China 1 shenzhen623@yahoo.com.cn 1shengchunyang@yahoo.com.cn 2phchen@pub.xaonline.com Keywords: Composite Materials; Material Evaluation; Damage tolerance; Damage Resistance; CAI Abstract.
Introduction CAI(Compression After Impact) values obtained by NASA (or SACMA) test standards usually are used as the very important index for material scientists to develop new composite systems and aircraft designers to select materials.
During the past 20 years CAI has been used to evaluate the behavior of composite materials to withstand impact.
Preliminary study on evaluation system of composite materials to withstand impact Recently Authors [2-5] carried out a lot of experimental study on the evaluation system of composite materials to withstand impact.
To be published in Journal of Composite Structures Vol 75, 2006 [5] Z.Shen, P.H.Chen, S.C.Yang.

As shown in Fig.1, the side length of the 0.1 kg cubic concentrated explosive charge is 0.04 m, with its mesh size 5 mm, and as the blasting center distance increases, the mesh has a very sparse gradient coefficient of two. 73926 nodes and 68688 elements were created in total, and all the materials were divided into Eulerian meshes, which allows multiple materials in one element.
In an Euler solver, the numerical mesh remains undeformed, while several kinds of materials are allowed to flow freely from one element to another.
This solver is suitable for modeling fluid phase materials, such as gas or liquid.
International Journal of Rock Mechanics & Mining Sciences. 44(2007)730–738 [3] Yang Xiumin, Jin Yiliang, Liu Dianzhong.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS.

Wu: Materials and Design.
Xiao: Materials Review.
Zhu: Materials Science and Engineering A.
Yamanaka: Materials Letters.
Wu: Materials Science and Engineering A.

FEM of ECDM Process on Semi Conducting Materials Lijo Paula*, P.V.
The scope of ECDM in micro machining of semiconducting materials is still found to be promising challenge for researchers.
Many researchers have carried out the modeling of ECDM for various engineering materials.
From the literature review it is found that very less work has been reported in FEM of ECDM in semi conducting materials.
An isothermal curve is generated with respect to melting point of the workpiece materials.

Having in mind these extreme requirements we have analyzed the effectiveness of friction materials used in the braking system of wind turbines.
The component composition of braking pads materials.
Nezhnikova, Energy efficiency and the quality of housing projects ARPN Journal of Engineering and Applied Sciences, 11(3) (2016) 2023-2029
Rosso, Study and Optimization of Metal Based Sintered Materials for Automotive Brake Friction Production, Solid State Phenomena, 254 (2016) 20-26
Popa et al., Research on Composite Materials Used for Brake Shoes Manufacture, Solid State Phenomena, 254 (2016) 207-211

Introduction Nanosized materials are a field that takes a materials science-based approach to nanotechnology.
In recent years, computer simulation technology as an effective method has been widely used in materials science, especially the study of nanosized materials [2].
Materials sciences have turned from the traditional "trial and error" research into a quantitative science based on the basic principles.
Due to the unique properties of nanosized materials and broad application prospects, its structure and properties has become the focus of materials science, physics and chemistry, and other cross-disciplinary research [3].
Journal of Liaoning Technical University, Vol.27(1), pp.9-12, 2008.02

The New Materials Institute of Shandong Academy of Sciences [17] has successfully developed V-Ti black ceramics hollow solar panels in small size.
With unique structure and property, the rare-earth vanadate materials are extensively applied as optical materials, laser materials, magneto-optical materials, dielectric materials, magneto-resistive materials, adsorbing materials, catalysts and chemical sensors.
VC wear-resistant materials.
Nano-vanadium materials.
[21] Jiaqiang Xu, Hailin Zhang, Chao Li, Xiaona Chen, Shengli Zhang: Journal of Zhengzhou University of Light Industry(Natural Science), Vol, 22(1), (2007), p. 5.