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Sintered materials tend to have low strength and ductility compared to the melted materials due to their low densities [2-4].
Deng: Materials Science and Engineering A 390 (2005), p. 98-112
Chawla: Materials Science and Engineering A308 (2001), p. 180-188
Torralba: Journal of Materials Science and Engineering Vol. 259 Issue 1 (1999), p. 98-104
Fontanari, G Straffelini: Experimental Results and Modeling, Journal of Engineering Materials and Technology Vol. 120 (1998), p. 248-255.

Introduction Nanometer technology changes with each passing day，nanometer material science is also unceasing and progressive.
Nanometer SiO2，as one of nanometer materials，its preparation method emerges continuously，such as Sol–gel technique, the vapor deposition, precursor, intercalation polymerization, and supermolecular self-assembly techniques[1-2].
Now, the high purity spherical nano-silica which is used in our country was almost importation, and its application scope is also extended continuously，such as materials of electronic encapsulation, photonic crystals, catalyst supports, accurate ceramic material, rubber, coating material etc[3].
[2] Guo Cai Xu, Ai Yuan Li, Li De Zhang, Guo Sheng Wu, Xiao You Yuan, Ting Xie, Journal of Applied Polymer Science, Vol. 90, (2003), p.837–840
Journal of Electrostatics, vol. 46, (1999), p. 171

Experimental Design Materials.
In the testing of soft materials, because of the low strength of soft materials, the transmission stress is small; the semiconductor strain gauge becomes the most effective method to test weak signals.
Bennett, An implicit finite element material model for energetic particulate composite materials, Int.
Lewis, A rate-dependent damage model for brittle materials based on the dominant crack, Int.
Song, One-Dimensional Dynamic Compressive Behavior of EPDM Rubber, Journal of Engineering Materials & Technology, 125 (2003) 294-301

Effect of Different Microstructures on the Performance of Air-Cooled Forging Steel 46MnVS5 Fracture Splitting Connecting Rod Yang WEI1,a, Wen FANG1,b, Chaolei ZHANG1,c*, Baorun CAI2,d, Yazheng LIU1,e 1School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 2Xining Special Steel Co.
It will provide support of date for new type of splitting fracture connecting rod materials.
C70S6, 36MnVS4, 46MnVS5, HM150, HM160 are materials for splitting fracture.
Application and development of air-cooled forging steel for automotive fracture splitting connenting rod, Materials Review. 31(3) (2017) 58-64.
Puzak, et al., Effects of chemical composition, heat treatment, and microstructure in splittable forged steel connecting rods, SAE International Journal of Materials and Manufacturing. 8(3) (2017) 765-773

Science in China Series E: Technological Sciences. 2009,52(3):634-640 [2] P.
Exact second-order estimates for the effective mechanical properties of nonlinear composite materials[J].
On the imperfectly bonded spherical inclusion problem [J].Journal of Applied Mechanics, 1999, 66 (12):839-846
Journal of SanXia university, 2009, 31(3):46-51
[9] Mori T，Tanaka．Average stress in matrix and average elastic energy of materials with misfitting inclusions[J]．Acta Metall，1973,21:571 - 574

Rock mass and PHBM are regarged as continuous material.
Constitutive relation of material is the ideal elastic-plastic model, and the yield criterion is Drucker-Prager.
(In Chinese) [5] Luyu Zhang, Yingren Zheng and Shangyi Zhao: Journal of Hydraulic Engineering, Vol. 1 (2003), p. 21-27.
(In Chinese) [6] Hong Zheng, Chunguang Li, Zhuofen Li, et al: Chinese Journal of Geotechnical Engineering, Vol. 24(5) (2002), p. 626-628.
(In Chinese) [7] Yingren Zheng, Shangyi Zhao and Luyu Zhang: Engineering Science, Vol. 4(10) (2002), p. 57-61.

Experimental Materials and Methods.
Because other sample B's, made up of four or five layers, were more stiff, so they were appropriate materials for be plates.
The four- or five-layers sample B and C were ideal materials for protective plates.
Donnelly: International Journal of Cancer, Vol. 82 (1999), p. 161-170
Lee: Journal of Thermoplastic Composite Materials, Vol. 13 (2000), p. 378-399

The materials and mass property of wheel part also presented as shown in Table 3 and Table 4.
Bandala: International Journal of Advanced Robotic Systems Vol. 13 (2016), p. 1 [6] K.
Cho: International Journal of Advanced Robotic Systems (2018), p. 1 [9] S.
Karthik: International Journal of Robotics and Autonomous System Vol. 3 (2018), p. 1 [10] F.
Aditya: Dhaka University Journal of Science Vol. 60 (2012), p. 115

Experimental Materials and Instruments.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (No. 20771013/B0101), HeBei province higher education teaching reform research support program (103045) and Hengshui Municipal Science and technology research projects (09057Z).
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Liu, Journal of Weinan Teachers College, In Chinese, 2004, 19(2): 47-49 [7] Y.
Chinese Journal of Organic Chemistry, 2009, 29(7): 1001-1017

Journal of Materials Science Vol. 37(17) (2002), p. 3675-3683 [2] J.J.
Mechanics of Composite Materials Vol. 43 (2007), p. 9-28 [5] J.H.
International Journal of Fatigue Vol. 35 (2012), p. 2-9 [13] Cornell Fracture Group.
International Journal of Fracture Fracture Vol. 23 (1983), p. 111-115 [17] Q.
Journal of Jiangsu University (Natural Science Edition) Vol. 32 (2011), p. 355-358