Search results

Experimental coefficients a,a’,b,b’ are functions of the laminate thickness, material, layup, impact mass and size, and boundary conditions.
References [1] Vermeulen B., van Tooren M.J.L., Design case study for a comparative performance analysis of aerospace materials, Materials and Design 27: 10-20, 2006
[8] Davies G.A.O., Olsson R., Impact on composite structures, The Aeronautical Journal (2004), pp.541-563
[9] Boll D.J., Bascom W.D., Weidner J.C., Murri W.J., A microscopic study of impact damage of epoxy-matrix carbon-fibre composites, J. of Materials Science, Vol 21 (1986), pp.2667-2677

However, the shell of refrigerating system must be made of resisting pressure materials because the saturation pressure of CO2 is high.
The disks were cut from the cylindrical bar of the roller material.
The lower flat disk (roller material) was mounted on a rotating shaft in an oil bath.
Lorentzen: International Journal of Refrigeration Vol. 18 (1995), pp. 190-197 [2] M.
Bullard: Progress in Energy and Combustion Science Vol. 30, (2004), pp. 119-174 [3] S.

The workpiece material is 45# steel with hardness of HRC50.The finished surface integrity was evaluated by surface morphology and roughness, and cross-section micro texture, surface hardness, residual stresses et al [4].
From the Fig.7, it can be induced that 5% abrasive concentration in micro hardness value is largest among three abrasive concentrations which may be resulted from its remove workpiece material effectively.
Acknowledgements This research were financially supported by the National Natural Science Foundation of China (Grant No. 50475052) and the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20040145001) References [1] C.H.
Li: Key Engineering Materials, Vols.304-305 (2006), pp.555-559
Cai: Journal of Qingdao Technological University, Vol.28 (2007) No.2: pp.6-13.

Experimental Setup and Material The laser used was a 4kW YAG laser.
And vapor/plasma is formed by weld material absorbing laser energy, then vaporizing and ionizing.
This mainly is related with thermal physical parameters of the weld materials (see in table1), such as for Ai-Li alloy, it has quite bigger thermometric conductivity and lower melting point than that of TC4.
Acknowledgements This work was financially supported by National Key Laboratory of Science and Technology on Power Beam Processes.
Journal of Laser Applications, 2007,19(4):245-251

In global economy, more than 95% energy, more than 80% industrial raw materials and above 70% agricultural production materials come from mineral resources.[1] In this sense, richness of mineral resources o f an area demonstrates potentials for economic development to certain degree.
In Qilianhe River coal nonferrous mineral resource area alone, the reserves for nickel and platinum have accounted for 61.8% and 57.0% of national reserves respectively.[2] In terms of chemical raw materials, the western area has strong advantage with China’s 97.1% potassium and 80.9% sodium salt reserves in the area.
Technical chain shall be formed by interfiling science, technology, design, production and construction.
Heat Mass Transfer 26 (1983) [3] Zhanli Jin, Zongli Wang and Hongyun Li: Journal of Shanghai Jiaotong University, Vol. 34 (2000) No.8, p.1079.
[5] Wang Baomin: Mechanical Science and Technology.

MoS2/Al2O3 composite coatings on A356 alloy for friction reduction Zhijing Penga, Tse Chengb, Xueyuan Niec Mechanical, Automotive and Materials Engineering, University of Windsor Ontario, N9B 3P4, Canada apeng7@uwindsor.ca, bjcheng@uwindsor.ca, cxnie@uwindsor.ca Keywords: MoS2; Alumina ; Plasma Electrolytic Oxidation; Coefficient of Friction; Wear Abstract A plasma electrolytic oxidation (PEO) ceramic coating process was used to form ceramic MoS2/oxide coatings on aluminum.
A higher brightness of transferred materials on Sample 1 should indicate the Fe was oxidized to a larger degree than the transferred Fe on Sample 5.
Liu, D.M Zhuang: Science and Technology of Advanced Materials 6 (2005) 535–539 [7] X.D.
Castillo: Journal of Applied Physics, 63 (1988) 3275 - 3277 [11] R.
Yellup: Composites Science and Technology, 57 (1997) 415-435

Because of its wide source and cheap price, fly ash is widely used in construction, building materials, road construction, etc..
Experimental materials and equipment This experiment used a new homemade purifying agent of granulated fly ash called Y-FMH.
The Y-FMH was made into the purifying agent after powder fly ash, binder, the pore forming material and other additive agents were mixed on a certain proportion, then cleaned, dried, granulated, etc., manufacture processes.
[3] Runping Han, Weihua Zou, etc.: In Chinese, Journal of Hazardous Materials[J], 2007, B141(1), p.156-162
[4] Chunfeng Wang, Jiansheng Li, Lianjun Wang, etc.: In Chinese, China Environmental Science[J], 2009, 29(1), p.34-36

For cohesive materials (e.g. clays), it is possible to establish similitude in a normal gravitational environment (1-g) by reducing the undrained shear strength of the model soil [1].
Therefore, to develop a soil can consider all of the mechanical properties of soil materials , both in technology or the time and funding is currently not a reality.
Based on the above considerations, this study uses the actual filling as the analog material.
Fig.1 Change laws of PGA amplification coefficients under different seismic waves Acknowledgement This work was supported by the Western Region Science & Technology Development Projects, Ministry of Communications of the People’s Republic of China (No. 2009-318-740-099, 2008-318-221-96).
Submitted to Journal of Soil Mechanics and Foundation Div., ASCE, 82(SM2)(1956) [3] Roscoe, K: Soils and model tests.

Nitride-related Compounds Preparation from Waste Aluminum Dross by Self-propagating High-temperature Process Jaeryeong Lee a, Ikkyu Lee b, Heeyoung Shin c, Jonggwan Ahn d, Dongjin Kim e and Hunsaeng Chung f Minerals & Materials Processing Div., Korea Institute of Geoscience and Mineral Resources, 30 Gajeong-dong, Yuseong-gu, Daejeon 305-350, Korea a jrlee@kigam.re.kr, blik7595@hanmail.net, chyshin@kigam.re.kr, ddran@kigam.re.kr, e jkim@kigam.re.kr, fhschung@kigam.re.kr Keywords: Aluminum Dross, Aluminum Oxynitride, Self-propagating High-temperature Process Abstract.
Al-dross with a high Al content is generally called "white dross", which typically occurs as a compact material in large clotted lumps or blocks.
Aluminum powder was also used as a reactant material with the mean size of 34 µm and a purity of 99% (granular shape, Alcoa Inc., USA).
Kevorkijan: Composites Science and Technology, Vol. 59 (1999), p. 1745 [4] T.
Holt: Journal of Materials Science, Vol. 22 (1987), p. 710 [6] H.

Karimi Zarchi3,c 1,2,3 Iran University of Science and Technology Engineering, Narmak, Tehran,16844 ,Iran am_ghadi@metaleng.iust.ac.ir, bmansour_soltanieh@iust.ac.ir, cKarimizarchi@iust.ac.ir Keywords: TRD, Borax salt bath, Low & High carbon Ferro Chromium, Diffusion chromium layer, Carbide chromium.
Xiaoxu: Materials Journal of Wuhan University of Technology- Materials Science Edition Vol. 25 (2010), p. 596
Ohta: Material Engineering Vol. 9 (1987), p. 183
Chen: Materials Chemistry and Physics Vol. 91 (2005), p. 192