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Spherical Auxetic Shells Teik-Cheng Lim School of Science and Technology, SIM University, Singapore alan_tc_lim@yahoo.com Keywords: Auxetic materials; Bending stress; Membrane stress; Spherical shells.
Materials that exhibit negative Poisson’s ratio are called auxetic materials.
Although such materials are quite rare, they nevertheless exist as naturally occurring materials and artificially made materials.
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Lim: Journal of Materials: Design and Applications Vol.227 (2013), p.111.

The deformation and internal forces of beams on non-linear elastic foundation materials were studied.
Journal of Shenyang Jianzhu University (Natural Science Edition), 23(2007)776-779
Journal of Qinghai University (Nature Science Edition), 32(2014)41-44
Applied Mechanics and Materials, 684(2014)11-20
Applied Mechanics and Materials, 684(2014)21-29.

Pharr, An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments, Journal of Materials Research. 7 (1992) 1564–1583
Series: Natural and engineering sciences. 3 (2012) 19-27.
Series: Natural and engineering sciences. 1 (2014) 207-211.
Energy concept of hardness by the kinetic sphere indentation, Advanced Materials Research. 1061-1062 (2015) 579-583
Pilvin, Materials characterization by instrumented indentation using two different approache, Materials and Dising. 31 (2010) 636-640

Greener Journal of Physical Sciences.
Journal Of Materials Science. 
Australian Journal of Basic and Applied Sciences.
European International Journal of Science and Technology.
Journal on Hazard Material.

Composite is a combination of two or more materials that form a new material.
Materials and Method The materials used are polyester resin (Yukalac BQTN EX Lot No.
ARPN Journal of Engineering and Applied Sciences.
Archives of Materials Science and Engineering.
Journal of Thermoplastic Composite Materials.

This paper introduces the basic methods of corrosion prediction for the materials in natural environment.
Materials corrosion prediction can speculate the long-term corrosion behavior using a short term corrosion data, speculate corrosion behavior of large samples based on small samples and speculate the materials corrosion in actual environmental with the simple condition indoor corrosion data.
Chinese Journal of Computers. 1993, 6(8): 592~598
China Journal of Corrosion and Protection. 2003, 23(1): 56~63
Corrosion Science and Protection Technology,1995,7(3):210-213

Influence of C/N Ratio on SND and Microbiological Analysis in Catching Bed Biofilm Reactor using Acrylic Resin Fiber as Carrier Materials in Civil Engineering Yan Zhang1a, ZhengYang Yang1b, LiLi Wang1a, XuYing Zhao2a HuanGuang Liu1a and Min Zhu1a 1Beijing Key Lab of Water Quality Science and Water Environmental Restoration Engineering College of Arc. and Civ.
In this study, effect of C/N ratio on denitrification were investigated using four sets of parallel catching bed reactors, which were using acrylic resin fiber (ARF) as carrier materials.
Materials and Methods Pilot Test of Catching Bed Biofilm Reactor.
Carrier Materials.
All reactors which using acrylic resin fiber as carrier materials could get high removal efficiencies of CODCr.

After comparing and analyzing the basic physical and mechanical parameters of original rock and model materials, the similar materials for soft rock tunnel are attained.
But most of these similar materials are studied for brittle hard rock [7].
Peking, Science Press.
Journal of Hydroelectric Engineering, 23(1), 48-51.
Beijing, Science Press.

Series: Materials Science and Engineering. 221(2017) 012011
Ayzenshtadt, Some Aspects of Technogenic Metasomatosis In Construction Material Science, Construction Materials. 1 and 2 (2019) 100–106.
World Applied Sciences Journal. 24 (12) (2013) 1691–1695
Alfimova, On the use of volcanic products in building materials science,Bulletin of BSTU named after V.G.
Kozhukhova, Autoclave Composites Containing Ferriferous Industrial By-Products, Materials Science Forum. 945 (2019) 1030-1035

The exchange-coupling interaction enhances magnetic loss of composite materials.
Fig. 3 shows the XRD patterns of the composite materials and the single materials.
Journal of Functional Materials, 2006, 6 (37) : 877-879
Ordnance Material Science and Engineering, 2002, 3 : 86-89
Journal of Environmental Sciences 2011, 23(Supplement) S74-S77.