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That is: KIC=σc Y (1) Obviously, the greater KIC is , the greater the capacity of material to resist fracture is, and KIC values of various materials can be tested out by experiment method, as shown in Fig.2, the penetrating crack with length 2a is in the center of a sample.
Acknowledgments This research is sponsored by Natural Science Fund of China(NSFC)(GrantNo.50575187) and Fund of Chinese Aviation Science(01I53073)and Fund of Natural Science of Shaanxi Province in China (2004E219)and Graduate Carve Out Seed Fund of Northwestern Polytechnical University (Z2011079).
Zuo and Anand Parey: Journal of Sound and Vibration Vol. 317 (2008), p. 608–624
[6] Hui Li: Key Engineering Materials Vols. 474–476 (2011), p. 1012–1018
Eaton et al.: Applied Mechanics and Materials,Vols. 24–25 (2010), p. 45–50

Freel, International Small Business Journal, 18 (2000) 60
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Tippett, Engineering Management Journal, 20 (2008) 36
Barclay, IEE Proceeding Science Technology 149 (2002) 105
Thompson, Journal of Advanced Nursing 55 (2006) 330

[6] T.Haga, K.Takahashi, H.Watari, Semisolid strip casting using a vertical type twin roll caste, Materials Science Forum, 426(2003)477-482
[7] T.Haga, Casting of Clad Strip Consisting of Al-Sn Alloy and Pure Aluminum, Materials Science Forum Volume 1007(2020)23-28
[8] T.Haga, S.Suzuki, Casting of aluminum alloy ingot for thixoforming using a cooling slope, Journal of Materials Processing and Technology, 118(2001)169-172
Kapranos, Billetless simple thixoforming process, Journal of Materials Processing and Technology, 130(2002)581-586
Kapranos, Thixoforming of laminate made from semisolid cast strips, Journal of Materials Processing and Technology, 157(2004)508-512.

This paper studied on the modification effect of coupling agent on the rubber concrete while the quality of silane coupling agent was 0.5% of that of cementitious material which compared with the mechanical properties of unmodified rubber concrete and the test of concrete under tension and compression ratio and compression ratio were analyzed at the same time.
As the most widely used in building materials, the performance of cement concrete toughness was poor.
Test Materials The model of cement is P·O 42.5R;Sand is medium of coarse river sand, and with continuous gradation, the fineness modulus is 3.0,Particle size of stones is 5～25mm, and grading qualified.The type of silane coupling agent is KH-560,Water reducer is high-effect of UNF-5, the rate of less water is more than 20% in the condition of mixing the quantity of 0.75% cementing material.It was used a rubber for fine rubber powder, particle size of 60-80 in test.
Journal of Dalian University of Technology. 2012, 52(2):233-238
Journal of Wuhan Institute of Technology. 2012, 34(9):17-21.

Analysis and Experiment of an Air Vibration Isolation System with Auxiliary Chambers Rong Wei Wen1, a, Jiu Bin Tan2,b, Lei Wang3,c and Guan Hua Wang 1 Building D, Science Park, No. 2 YiKuang Street, Nangang District, Harbin, China 2 Building D, Science Park, No. 2 YiKuang Street, Nangang District, Harbin, China 3 Building D, Science Park, No. 2 YiKuang Street, Nangang District, Harbin, China ahgoier@yeah.net, b jbtan@hit.edu.cn, c hit_wanglei@hit.edu.cn Keywords: Air Vibration Isolation, Damp, Chambers Abstract.
The influence of the structural damping of the rubber material used in the air spring is often ignored in practical design.
In the actual analysis must consider the impact of structural damping on the vibration response. in a repeated stretching, energy is constantly consumed in the material.
References [1] Sugahara, Y, Takigami, T. and Kazato, A.: Suppressing vertical vibration in railway vehicles through air spring damping control, Journal of system design and dynamics, Vol. 1 (2007) No. 2, pp.212 [2] K.
Shi: Journal of Mechanical Strength, Vol. 33 (2011) No.1, p.131.

Introduction In the truss structure, the bars are mainly loaded with axial forces, with area of the bar being much smaller, hence the truss structure has less material and mass.
Acknowledgments This work was supported in part by the Fundamental Research Funds for the Central Universities (HEUCF140700), The natrual science foundation of Heilongjiang province(E201417), State Key Laboratory of Robotics and System (HIT) and the Heilongjiang Postdoctoral Science Foundation (323630297).
Journal of hebei institute of architecture and civil engineering Vol.31(2013), p.8 [2] Zhu Zheda, Shu Ganping, Jin Ruyuan, Zhao Wei and Mi Jinxin: Structural design and progressive collapse analysis on an internal-break arch-truss structure.
Journal of Chang’an University(Natural Science Edition) Vol.33(2013), p.100 [4] Luo A-ni, Liu He-ping, Wang Yong-fan, Song Jian-hua and Ma Wen-tao: Analysis of Instability for the String-net Structure in the Deployable Antenna.
Key Engineering Materials Vol.10 (2013), p.124

Acknowledgment This research is supported by the National Science Foundation (50375147, 50535040).
[5] J.L.Yuan, L.N.Chen,P.Zhao, et al: Key Engineering Materials,Vol.259-260(2003), pp.195-200
[6] J.L.Yuan, Z.W.Wang,B.H.Lv et al:Key Engineering Materials,Vol.304-305(2006), pp.300-304
[7] B.H.Lv, J.L.Yuan,Y.X.Yao, et al: Key Engineering Materials, Vol.304-305 (2006),pp.403-407
[8] R.T.Lee, Y.C.Hwang,Y.C.Chiou: International Journal of Machine Tools and Manufacture, Vol.46(2006).pp.1146-1156

The liquidity of the bulk material can fill the cavity spaces.
Journal of Chongqing Jiaotong University, 2006,25(B06): 85-88
Applied Clay Science，2009,46 (2): 156-160
Dynamic deformation characteristic of grading macadam mixture[J] China Journal of Highway and Transport, 2003,16 (1): 22-26
Resilient deformation behavior of unbound stone aggregates[J] Journal Of Chang'an University(Natural Science Edition), 2007, 27 (6): 29-33.

Apparatus and materials Sample preparation The materials (pure olive oil, soybean oil and rapeseed oil) purchased from the supermarket.
Journal of Beijing Technology and Business University (Natural Science Edition), 2010.9, 28(5):56-59
JOURNAL OF HENAN UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE EDITION), 2008,29(1): 12-16
Science Press ,Beijing, China, 2002
Science Press ,Beijing, China, 2002

Materials and Methods “Materials and Methods” was narrated in “Effects of AOC and Phosphorus on Bacterial Growth under Oligotrophic Condition(1)”.
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