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Investigation of Material Properties and Force of 6-year-old Children Lumbar FEM Jesse RUAN, Aoyang YU, Wei ZHAO and Haiyan LI College of Mechanical Engineering Tianjin University of Science & Technology Tianjin, China Keywords: Children lumbar; FE model; Biomechanics Abstract: The purpose of this study was to investigate injury mechanism and injury biomechanical response of children lumbar segment L4-L5.
Material Properties in FE Model.
Different parts of the same ligament were assumed to have the same material properties under tension loads when treated by linear material.
Chinese Journal of Clinical Anatomy. 1999, 17(2) [5] Diane R.
Journal of Orthopaedic Research 22（2004）901-909 [6] King H.

By determining the necessary work, unnecessary work and shape factors β[2] and other parameters, we can obtain materials’ fracture properties.
Due to its simplicity of experiment and data analysis, many domestic and foreign scholars apply this method to a variety of materials in the study of fracture.
So, in order to ensure the consistency, we use the same batch of the raw materials, the same processing equipment and experiment under the same external environment to process and do the experiment.
[4] Y.W.Mai, et al: Journal of Polymer Science Part B: Polymer Physics.
[5] Chang Wu-jun, et al: Introducing Journal of China Ordnance.

Study on the performance of new foamed cement insulation material XiaoLong Li, GuoZhong Li a* Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, School of Material Science and Engineering, University of Jinan, Jinan 250022, Shandong, China amse_ligz@ujn.edu.cn, *correspondence author Keywords: foamed cement; chemical foaming; thermal conductivity; microscopic morphology; action mechanism Abstract.
Nowadays widely used insulation material mainly includes three types: organic insulation materials, inorganic thermal insulation materials, and metallic insulation materials [3].
[2] Fengxiang TU: New Building Materials. (1) (2001), p. 32-35
[3] Chunsheng LIU: Guangdong Building Materials. (8) (2005), p.113-114
[4] Yasser MHunaiti: Journal Of Materials In Cival Engineering. (5) (1997), p. 60-62.

Mesoporous materials are porous materials (pore size ranging from 2-50 nm), and M41S family mesoporous materials was first successfully synthesized by Mobil Oil in 1992, then mesoporous oxidation silicon SBA-15 with adjustable pore (2-30 nm) were synthesized by Zhao and co-workers in 1998 [5-7].
The material of SBA-15 which has many advantages for larger pore size and surface area, highly ordered two-dimensional hexagonal straight pore structure, good spread property, machinery and hydrothermal stability, controllability morphology and surface features organic functionalized, comparing with the other porous materials (such as microporous materials, macroporous materials).
Materials and methods Materials Recombinant human bFGF in Pichia yeast strain ( Life Science Research Center, Beihua University); NIH 3T3 cells (Life Science Research Center, Peking University); Triblock copolymer polyethylene glycol - polypropylene glycol - polyethylene glycol (P123 average molecular weight of 5800) (USA Aldrich); Tetraethyl orthosilicate (TEOS, AR) (Aldrich, USA); Peptone, yeast extract (British OXOID company); Yeast nitrogen, agarose (U.S.
At last, the mesoporous materials of adsorpting protein were freeze-dried.
Stucky, Science 279,548. (1998) [8] Yj.

Copper coated iron powder prepared by chemical reduction process Xiaoyun Zhu1,a, Zhongcheng Guo 2,b 1Faculty of Material and Science and Engineering, Kunming University of Science and Technology 2Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Kunming, P.
Raw material and experiment method for fabrication of CCIP Raw materials for the experiment.
The main raw materials for making CCIP are reduced iron powder, cupric sulphate, complexing agent and reductant etc.
Liu, Journal of Central South University of Technology(natural science), 28(4) (1997), p340-342
[3] Leon CA and Drew RAI, Journal of Materials Science, 35(19) (2000), p4763-4768

International Journal of Plasticity, 24(6): pp. 1071-1096
On fracture locus in the equivalent strain and stress triaxiality space, International Journal of Mechanical Sciences, 46(1), p.81-98
Journal of the Mechanics and Physics of Solids, 17(3), p.201-217
Lemaitre, A continuous Damage Mechanics Model for Ductile Fracture, Journal of Engineering Materials and Technology 107, pp.83-89, 1985 [11] Y.
Wierzbicki, Forming severity concept for prediction sheet necking under complex loading histories, International Journal of Mechanical Sciences, 50, pp.1012-1022

The formation mechanism and influence factors for mullite whiskers materials were discussed.
Introduction Due to the excellent mechanical properties, especially the high temperature mechanical properties, mullite whiskers are often used to toughen high temperature ceramic materials.
Therefore, in this paper, the effects of mullite whisker morphology and length to diameter ratio were studied using different aluminum source, the formation mechanism and influence factors materials were discussed.
Acknowledgements The present work was supported by the National Natural Science Foundation (Grant No. 51462016 and 51562013) and Major Natural Science Foundation of Jiangxi Province (No.20152ACB21022).
Han, New growth technology and mechanism of mullite whiskers, Journal of Inorganic Materials，1 (1996) 101-106

The change in process behavior and final properties of materials during processing is essential for the design of new processes and products.
Chen, A critical review of experimental results and constitutive description for metals and alloys in hot working, Materials and Design 32, 1733-1759, 2011
Materials Science and Engineering A309-310, 377-381, 2001
Gottstein, Work hardening model based on multiple dis-location densities, Materials Science and Engineering A400-401, 231-233, 2005
Sherby, Creep behavior of Fe–C alloys at high temperatures and high strain rates, Materials Science and Engineering A317, 101 -107, 2001

Preparation and Properties of Al2O3 Ceramic Reinforced Mo-based Composites by Al(NO3)3 Precursor Liujie Xu 1, a, Shizhong Wei1,b, Guoshang Zhang2, Jiwen Li2, Xiangdong Ma1, Baozhu Dai2 1 Henan Engineering Research Center for Wear of Materials, Henan University of Science and Technology, Louyang 471039, China 2 School of materials science and engineering, Henan University of Science and Technology, Louyang 471003, China awmxlj@126.com, bwsz@mail.haust.edu.cn Keywords: Molybdenum, Composites, Al (NO3)3, Al2O3, Property Abstract.
It is very important for the application of molybdenum in structural materials to research and develop new molybdenum alloys.
But ceramics exhibit poor toughness which restricts their application for structural materials.
Raw materials of experiment adopt analytically pure Al(NO3)3·9H2O (purity higher than 99.0%) and analytically pure MoO3 ( purity higher than 99.0%).
M.Molodets: High Pressure Res Vol. 25(2005), p211 [7] M.Nawa, T.Sekino and K.Niihara: Journal of Materials Science Vol. 29(1994), p3185 [8] Sheng-Chang Wang and Wen-Cheng J.Wei: Nanostructured Materials, Vol.10(1998), p983 [9] Liu Kaiqi, Pan Wei, Fan Zhenkun, et al.: Rare metal materials and engineering Vol. 36(2007), p238

The methodology of testing was similar to the one used in thin-layered or textile materials [12].
The tensile strength and stiffness were tested on both materials, each represented by more than 6 samples.
Chaikof, Engineered collagen-PEO nanofibers and fabrics, Journal of Biomaterial Science, Polymer edition 12 (2001) 979-94
Nežerka, Influence of copper ions on mechanical properties of PVA-based nanofiber textiles, Applied Mechanics and Materials 486 (2014) 201-204
Nežerka, Mechanical properties of single and double-layered PVA nanofibers, Key Engineering Materials 586 (2014) 261-264.