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With further increase of the elastic tool pressure, the excessive material wave deforms along the bending former radius (fig. 1, c).
Akdemir, Computer aided modelling of flexible forming process, Journal of Materials Processing Technology. 148 (2004) 376–381
Ahmad, Sheet metal forming with the aid of flexible punch, numerical approach and experimental validation, CIRP Journal of Manufacturing Science and Technology. 3 (2010) 196–203
Ahmad, Computer aided modelling of friction in rubber-pad forming process, Journal of Materials Processing Technology. 209 (2009) 4925–4934
Plotnikov, Constrained Bend in Cold Sheet Press-Forming by Elastomer, Bulletin of Samara Scientific Center of the Russian Academy of Sciences. 6(4) (2013) 855-860

Erbium doped tellurite glasses are very interesting materials in the field of basic science and for several photonic applications [10].
All materials were prepared with high purity raw materials (99.99%).
To achieve homogeneity, the liquid materials shaked before poured.
Zainal, Optical properties of ternary tellurite glasses, Materials Science-Poland. 28 (2010) 173-180
Refractive index and optical properties, Journal of Optoelectronics and Advanced Materials. 6 (2004) 747-753

Study on Volume Stability of High Strengthen High Performance Concrete Runxia Hao1, Xiaoyan Guo1 Junmei Zhao2 1.School of Architecture and Civil Engineering, Inner Mongolia University of Science and Technology, Baotou ,China ,014010; 2 School of Resource and Security, Inner Mongolian University of Science and Technology, Baotou, China, 014010 haorx5300630@163.com gxy.jiang@yahoo.com.cn zhao_junmei@sina.com Keywords: high performance concrete; fine mix material; expansibility; air shrinkage ratio; volume stability Abstract.
Specimen preparation and test method Raw material and sample mix proportion.
It illustrate that shrinkage of cement material clean paste occurred in the early days, and preventing shrinkage in the early days of cement material was very important.
Acknowledgements: Innvovation fund of Inner Mongolian University of Science and Technology (code: 2009NC026) References [1] H.J..Ba, X.J.Gao Y..Z.Yang.
[3] Wu Zhong-wei,Lian Hui-zheng.High performance concrete[M]Beijing:China Railway Press [4] Nihal A,ZCanna G,Ergin A.Evaluation of ratio between splitting tensile strength and compressivestrength for concretes up to 120 MPa and its application in strength citerion[J].Aci Materials Journal,2006(1/2):18-24.

In ocean science research, it often requires the integrity of the gas content in samples of seawater.
Fig. 3b is a mesh model of the PTEF coated O-ring which is made from two materials.
Annual Review of Earth Planetary Sciences, 2002, 30：385-491
Journal of Oceanography, 2002. 58: 775-785
CHINESE JOURNAL OF MECHANICAL ENGINEERING. 2011, accepted.

JJKH20180093KJ), Jilin Provincial Science & Technology Department (Grant No. 20180201004GX), China Post Doctoral Science Foundation (Grant No. 2016M601382).
Materials Science & Engineering A, 2009, 499(1): 234-7
Journal of Materials Processing Technology, 2012, 212(1): 120-7
Materials & Design, 2014, 54(2): 498-506
Journal of Materials Processing Technology, 2014, 214(9): 1820-7

To begin with, statistics of research journals about learning community of recent three years was made.
All of the teachers are supposed to learn in a group or a community; they are willing to help with each other by sharing teaching materials and resources online.
Table1, Statistics about the Journals of Learning Community Based on CNKI from 2011 to 2013.
It is high time to establish resources database, not only including course materials and knowledge database, but also teachers’ self-made resources, such as PPT, teaching plan, sound materials uploaded to be shared with in the community.
Acknowledgements This work is financially supported by the Science and Research Department of my work unit.

Developing humanoids is critically dependent of the use of highly efficient, compact, lightweight actuators and electroactive materials are offering great potential.
This paper reviews the state-of-the-art of humanlike robots, potential applications and challenges, as well as the actuation materials that are used or could be used.
Progress in materials science have led to covering of robots that is increasingly being humanlike.
Many of the EAP materials that are known today have been discovered and emerged in the 1990s.
Bar-Cohen, (Ed.), Proceedings of the SPIE’s Electroactive Polymer Actuators and Devices Conf., 6th Smart Structures and Materials Symposium, SPIE Proc.

Introduction The application of polymer materials is widely expanded due to their advantages, e.g., law cost, lightweight, high strength and machinability, etc.
The amount of disposed oyster shells is approximately 200,000 ton per year in Japan [5], and the availabilities of waste oyster shells are researched such as water clarification [6,7] and composite materials [8-10].
Experimental Materials.
References [1] K.Okubo, T.Fujii and N.Yamashita, JSME International Journal Series A: 48(2005), p. 199 [2] H.Takagi and R.Takura: Journal of the Society of Materials Science, 52(2003), p. 357 [3] L.Qin, J.Qiu, M.Liu, S.Ding, L.Shao, S.Lu, G.Zhang, Y.Zhao and X.Fu: Chemical Engineering Journal, 166(2011), p. 772 [4] M.S.Huda, A..K.Mohanty, L.T.drzal, E.Schut and M.Misra: Journal of Material Science, 40(2005), p. 4221 [5] M.Demura: Monthly review of agriculture, forestry and fishery finance The Norin kinyu, 57(2004), p. 666 [6] M.Torii: Fisheries Engineering, 44(2008), p. 205 [7] H.Kwon, C.Lee, B.
Jun, J.Yun, S.Weon and B.Koopman: Resources, Conservation and Recycling, 41(2004), p. 75 [8] M.Kitagawa, P.Li, F.Maejima and W.Mizuno: Journal of the Society of Materials Science, 51(2002), p. 943 [9] K.Fujita, T.Torii, M.Shibata, A.Hirahara and K.Murakami: Journal of the Japan Research Association for Textile End-Uses, 46(2005), p. 297 [10] H.Kani, T.Yamagami, M.Yoshida, T.Uchiyama, N.Nagano and H.Minoshima: Reports of the Hokkaido Industrial Research Institute, No. 303(2004), p. 75

Its specific gravity and strength are one-fifth and five times as large as steel materials, respectively.
Then, the CNF is expected to be used as a composite material [6-8].
Peijs, Review: Current international research into cellulose nanofibres and nanocomposites, Journal of Materials Science, 45 (2010) 1-33
Yano, Production of cellulose nanofibers and their applications, Journal of The Society of Rubber Science and Technology, Japan 85 (2012) 376-381
Kobayashi, An experimental study of fabrication of cellulose nano-fiber composited Ni film by electroplating, Materials Transactions 63 (2022) 821-828

But the studies of coupling agents used in calcium-plastic composite packing materials were little, especially fruits and vegetables packaging.
Experiment Experimental Materials.
Therefore, for the calcium plastic materials, the optimum amount of coupling agent is 2.25 wt. %.
[8] Carmen Albano and Miren Ichazo: European Polymer Journal 38 (2002) 2465–2475
Maji: Composites Science and Technology 70 (2010) 1755-1761