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Introduction Slake Durability Index test which was firstly developed by Chandra [1] and then improved by Franklin & Chandra [2] is being widely used in rock mechanics, engineering geology and the selection and evaluation of natural building material.
The slake durability test was suggested as a standard test for rocks by the International Society of Rock Mechanics [5] and also by the American Society for Testing and Materials [6].
Materials and Methods Rock Samples.
Chandra: The Slake Durability Test, International Journal of Rock Mechanics and Mining Sciences, 9 (1972) 325-341
Daloglu: Assessment of Eskisehir-Derbent tuffs as a natural building stone material, MSc Thesis, Eskisehir Osmangazi University, Eskisehir, Turkey, 2008

So it is believed that the research and development of these alloys with excellent properties will attract increasing attention of the materials researchers and the foundry men [2-4].
Experimental material has high ultimate tensile strength Rm - 247 MPa in as-cast state after rapid cooling.
In the experimental material the presence of the Fe impurity enables the crystallization of acicular plate-like phase Al5FeSi (about the size 80 -100 µm) (Fig. 3b) during solidification, even though the Fe content is low (0.15 %) in a melt.
Guthy, The aluminium-silicon eutectic reaction: mechanisms and crystallography, Journal of Light Metals. 1 (2001) 199-218
Dúl, Effects of strontium on the microstructure of Al-Si casting alloys, Materials Science and Engineering.

Mechanical Properties and Microstructures of Ferritic-Rolled High-Strength Interstitial-Free (IF) Steel Sheets Weimin Guoa , Zuocheng Wangb , Sheng Liuc, Libin Songd School of Materials Science and Engineering, Shandong University, Jinan, 250061, China a gweimin84@gmail.com bzcwang@sdu.edu.cn cliusheng6690@163.com dderby@sdu.edu.cn Keywords: Ferritic rolled, Interstitial-Free (IF) steel, deep drawability, r-value, microstructure, P, high-strength IF steel Abstract.
Experimental Procedure The material used in this study is a Ti-stabilized high-strength IF steel and its chemical compositions are listed in Table 1.
JOURNAL OF IRON AND STEEL RESEARCH, INTERNATIONAL Vol. 15(5), (2008) 70-76 [5] Jing Cainian, Wang Zuocheng, Han Futao, et al.
Key Engineering Materials Vol. 353-358 (2007), P. 1657-1660 [7] Wang Zuocheng, Guan Xiaojun, Wang Xianjin.
MATERIALS REVIEW Vol. 15(9) (2005), p. 20-54 (in Chinese)

Introduction The fiber reinforced composite materials are used widely in aerospace applications and various machine components because of their high strength-to-weight and stiffness-to-weight ratios as compared with many traditional metallic materials.
Thus by reducing the material stiffnesses by a certain amount, we account by the loss of stiffness [7].
The material and geometrical characteristics of analyzed specimen are shown, respectively, in Table 1 and in Fig. 1 [9].
Composite Science Technology, Vol. 66(2006), p. 264–272
Hashin: Failure Criteria for Unidirectional Composites, ASME Journal of Applied Mechanics, Vol. 47(1980), p. 329–334

Brief comments on “Unloading Rock Mechanics” and Engineering Applications ZHAO Baoyun 1,2, ZHU Keshan1 1Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University) Ministry of Education, Chongqing University, Chongqing, 400045, China 2School of Civil Engineering and Architecture; Chongqing University of Science & Technology Chongqing, Chongqing 401331, China Email: baoyun666@163.com Keywords : Rock engineering; discontinuity; excavation; unloading Abstract.
Excavation is to remove rock material from within the rock mass resulting an opening in a sequential way.
Ha et al[3] developed an apparatus to study the size effects of unloading rock mass using aeromechanical model materials.
Removed materials.
Based on the direct tension creep behaviors of sandstone Burgers model’s improvement and application, Chinese Journal of Geotechnical Engineering, 33(11), 1741-1744.(2011)

Setting material properties:The material of bit body is carbon steel, material density is 7.8 × 106 g/mm3, elastic modulus E is 2.1 × 1011 N/m2, Poisson ratio μ is 0.28, the yield strength is 2.21 × 108 N/m2 .The materia of tooth carbide is hard alloy, the yield strength is 6.2 × 108 N/m2.
Based on the model geometry and default material properties, the program can estimate the solution time.
The node 23027 of step 2 ‘s maximum stress is 2.51 × 108 N/m2 in 1039μs,beyond the yield stress of 2.21 × 108 N/m2.It will not influence the material when the stress beyonds the material yield stress instantly , but when the drill falling on the ground periodically, where the fracture will be occured firstly.So the step 2 is more easily to be fractured than the other steps.
Computer and Information Science.2009,2(3):75~86
International Journal of Recent Trends in Engineering.2009,1(5):66~70

Influence of nanoscaled SiO2 particles on the pervaporation performance of PDMS membranes Rui Mana, Xinhua Dengb School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin, 300387, China amanruilove@163.com, bdengxinhua@tjpu.edu.cn Keywords: polydimethylsiloxane (103-PDMS); propylene glycol methyl ether (PGME); nanoscaled silica particles; pervaporation performances.
Due to its special polymer structure having both inorganic and organic structures, PDMS membrane is a novel kind of membrane materials, which could be used as organic permselective membranes[1,7].
Especially, from Fig. 9, when the weight ratios of major material (103-silastic:PMTSi:SiO2) is 100:4:0.20, the agglomerated particles appeared on the surface heavily, and the size of agglomerated particles was larger many times than the single nanoscaled SiO2 particle.
When the weight ratios of major material (103-silastic:PMTSi:SiO2) is 100:4:0.08, the α of 103-PDMS membranes can reach to 17.64, and its J was 31.82 g•m-2•h-1.
Journal of Jilin institute of chemical technology.

Fig. 1 General view of the sample for high research and its scheme of weld metal scraps The material for the study of selected high speed steel Т1 (ASTM USA)-quenched martensite on, and corrosion-resistant chromium steel 430 (ASTM USA), relating to ferritic grades.
The Structure and Properties of Hard Metals Irradiated by High-Energy Electron Beam // Advanced Materials Research. - 2014 - Vol. 872. - p. 214-218
Forecasting of Hard-Alloyed Cutting Tool Resistance Based on Thermal Diffusivity // Materials Science Forum. - 2013 - Vol. 762. - p. 777-781
[5] Kuznetsov, M.A., Zhuravkov, S.P., Zernin, E.A., Kolmogorov, D.E., Yavorovskiy, N.A Influence of nanostructured powder modifiers on the structure of a welding bead // Advanced Materials Research.
Valuev // MINING INFORMATIONAL AND ANALYTICAL BULLETIN (SCIENTIFIC AND TECHNICAL JOURNAL). – 2012. - № 12. – С. 96. – 104

Preparation of PNIPAAm Grafted Cotton via O2 Plasma and its Thermal Sensitivity Yongqiang LI1, 2, a, Tingting LIU1, b and Jinqiang LIU1, 2, c 1Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Ministry of Education,Zhejiang Sci-Tech University,Hangzhou 310018, China 2Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China ayqqli@163.com, bliutinghome@163.com, cjqliu@zstu.edu.cn (corresponding author) Keywords: Cotton fabric; Poly (N-isopropylacrylamide); Plasma; Grafting; Temperature-sensitivity Abstract.
Low temperature plasma modified fiber materials with multiply effects, such as surface etching, cross linking and initiating grafting.
Experimental Materials and chemicals.
Reference to Chinese national patent “A method and device for testing the temperature-sensitivity of thermal-smart textiles” [9] which covers the measurement of the water permeability at different temperatures—the rate of water flowing perpendicular through a known area under a constant pressure between two surface of a material, we can detect the thermal-sensitivity by the variation of water permeation time.
B, You-Lo Hsieh, Journal of Applied Polymer Science. 89 (2003) 999-1006

A new material—physically based calculation method is used to evaluate the load capacity of bevel and hypoid gears [4].
A finite element numerical modeling of materials response in gears tooth root and life prediction considering crack initiation period is developed [13].
Can, Three point load application in single tooth bending fatigue test for evaluation of gear blank manufacturing methods, International Journal of Fatigue 26 (2004) 785–789
Rosa, Bending Fatigue Tests of Helicopter Case Carburized Gears: Influence of Material, Design and Manufacturing Parameters, Gear Technology (Nov/Dec 2009) 68-76
Bereza, Method for the evaluation of wear and durability of involute conical straight-bevel gears, Materials Science, Vol. 45, No. 4, 2009, 595-604