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Simulational Studyon Biaxial Tensile Test of the Envelope Material of Stratospheric Airship Yanbo Zhang1,a, Mingyun Lv2,b, Shouchao Gu3,c, Junhui Meng4,d 1School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China abuaazhangyanbo@yahoo.cn, blv503@buaa.edu.cn,cdaocaoren123gsc@163.com Keywords:Envelopematerial, Biaxialtensile, Tearstrength, Finite element simulation Abstract.
Currently, people have done many researches on tear strength and failure mechanism of laminated fabric materials.
Xing and Z.GZhou, et al: Journal of MaterialEngineering, Vol.12 (2010).
[6] ShojiMaekawa, KouichiShibasaki, Toyotashi Kurose, et al: Journal of Aircraft, Vol.45 (2008) NO.5, [7] Y.
(InChinese) [9] Aeronautics Research Institute of China: Handbook of Stress Intensity Factor (Science Press, China 1993).

Seshan: Journal of Materials Science Vol. 34(1999), p.5045-5049 [2] G.D.
Zhang: Chinese Journal of Material Research, Vol. 11(1997), p. 649-657 [3] W.S.
Sue: Materials Science and Technology, Vol. 17(2001), p.497-504 [4] D.
Wang, M.H Chen: Development and Application of Materials, Vol. 20(2005), p.29-33 [6] S.
Flower: Materials Science and Technology, Vol. 16(2000), p.806-810

International Conference Series on Science of Hard Materials (ICSHM) : Professor J.
There are: · 2nd ICSHM, 1984, Rhodos, Greece ( Science of hard materials, ed.
· 3rd ICSHM, 1987,Nassau, Bahamas ( Science of Hard Materials -3, ed.
His devotion to cause of the science of such groups of materials was exemplary.
Upadhyaya, Powder Metallurgy: Science, Technology and Materials, CRC Press, Boca Raton, USA, 2011

Surface Science and Engineering, Vol. 4, No. 1 (2010) [2] H.
Conrad: Effects of Temperature and Ram Speed on the Flow Pattern in Axisymmetric Extrusions of 2024 Al Alloy, Materials Science and Engineering, 12, pp. 47-58 (1973) [4] J.X.
Takahashi: Experimental simulation of metal flow in porthole-die extrusion, Journal of Materials Processing Technology, 49 pp. 1-11 (1995) [5] H.
Valberg: Metal flow in the direct axisymmetric extrusion of aluminum, Journal of Materials Processing Technology, 31, pp. 39-55 (1992) [7] Y.
Murakami: Metal flow in porthole die extrusion of aluminum, Journal of Materials Processing Technology, 121, pp. 107-115 (2002) [9] T.

Klocke, EDM simulation: finite element-based calculation of deformation, microstructure and residual stresses, Journal of Materials Processing Technology, 142 (2003) 434-451
Schumacher, After 60 years of EDM the discharge process remains still disputed, Journal of Materials Processing Technology, 149 (2004) 376-381
Kogmen, Comparison of mathematical models for electric discharge machining, Journal of Material Processing & Manufacturing Science, 4 (1995) 163-176
Luo, The dependence of inters space discharge transitivity upon the gap debris in precision electro-discharge machining, Journal of Materials Processing Technology, 68 (1997) 121-131
Fauziah, Investigation on the influence of machining parameters when machining tool steel using EDM, Journal of Materials Processing Technology, 116 (2001) 84-87

The advantages of soft magnetic materials prepared by MIM are exhibited, the research status and development of soft magnetic materials prepared by MIM are reviewed.
Metallic Functional Materials. (6) (1994), p. 37.
Materials Science Forum, (534-536) (2007) , p. 1353-1356
Journal of Magnetic Materials and Devices.
Rare Metal Materials and Engineering.

When comparing both materials it can be observed that they are similar, with a small advantage in performance for the 240 mm beam.
Analysing the materials under the microscope it couldn’t be observed any imperfection.
Construction and Building Materials, 189, 1264-1285
Construction and Building Materials, 263, 120632
In IOP Conference Series: Materials Science and Engineering (Vol. 1090, No. 1, p. 012108).

Computer simulation becomes a new method for developing ceramic tool materials.
The simulation of crack propagation behavior of ceramic tool materials can help to design the higher property materials.
Wakayama, Simulation of microfracture process of brittle polycrystals: Microcracking and crack propagation, Computational Materials Science 8 (1997) 327-334
Part II: Numerical examples, Mechanics of Materials 35 (2003) 365-394
Ilschner, Fracture behaviour of composites based on Al2O3-TiC, Journal of Materials Science 15 (1980). 875-885.

Critical Factors for the Construction Company to Select the Green Building Materials Kuei-Yang Wu1*, Yen-Yu Wu2 , I-Ting Tsai1, Shi-Wen Yung3 1 Department of Architecture , National United University, Miao-Li City 36003, Taiwan 2 Graduate Institute of Environmental Engineering, National Taiwan University, Taipei City 10617, Taiwan 3 Department of Materials Science and Engineering, National United University, Miao-Li City 36003, Taiwan * Tel.: +886 37 381645; Fax: +886 37 354838.
Green Building Materials and Estimate Factor The concept of green materials was proposed in International Union of Materials Research Societies-IUMRS in 1988.
We can understand the building environment [5] through the relationships among human beings, environment, buildings and materials science.
[6] Che-Ming Jiang, Chen-Cheng Chen, Chiang-Chang Li, Wen-Cheng Shao, Jui-Lin Chen, Ming-Chin Ho: A Study on Healthy Green Building Materials Applying ISO Standards to the Climatic Features of Taiwan, Journal of Architecture, No 62, Special Issue on Technology, 2007, p1-18
[17] Chii-Reid Wu, Using ANP Method to Evaluate the Subsidization Policy of the Irrigation Association Membership Fee, Journal of Hummanities and Social Sciences of NHCUE, Vol. 2, No. 2, 2009, p.101-122

It is composed of two elastic, isotropic and homogenous materials that are perfectly bonded along the interface.
The material above the interface is termed material 1 and the material below is termed material 2.
There are interfacial cracks (the crack positioned at the interface between two materials), crack embedded in material 1 (case 1) and lastly, cracks formed in the materials 2 (case 2).
Crack deflection is another important issue especially when interfacial crack appeared in dissimilar materials or structures.
Abdul Razzaq, Stress intensity factors under combined bending and torsion moments, Journal of Zhejiang University-SCIENCE A. 13 (2012) 1-8