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Including both the different strength in tension and compression and the contribution of intermediate principal shear stress on the material strength, the unified solution for sheet forming is gained based on Yu’s unified strength theory, which can be reasonably applied to a wide range of materials.
(3) where, st is the tensile ultimate strength of material, sc the compressive ultimate strength, to the shear ultimate strength, a the tension-compression-ratio, varying from 0.77 to 1.0 for ductile metal material, 0.33 to 0.77 for brittle metal material, and generally less than 0.5 for geotechnical materials, B tension shear ratio, and b participation factor of intermediate principal shear stress.
Included are the contributions of both intermediate principal shear stress and varying tension-compression-ratio, the formulas developed in this paper can reasonably apply to a wide range of materials with different strength in tension and compression.
Song: Journal of Mechanical Strength, Vol. 21 (1999) No.2, p.150
Liu: China Civil Engineering Journal, Vol. 30 (1997) No.2, p.14

References [1] Huajun Mao, Hua Yan, Jiaqing Xie et.al: Chinese Journal of Functional Materials Vol. 38(2007), p. 3172-3174, in Chinese
[2] Zhongfeng Hu: Chinese Journal of 21st Century Building Materials Vol. 3(2009), p. 47-50, in Chinese
[3] Shiyun Zhong and Feng Wang: Chinese Journal of Shanghai Building Materials Vol. 5(2005), p. 19-21, in Chinese
[5] Dagen Su and Xiaobo Wang: Chinese Journal of Silicone Material Vol. 21(2007), p. 143-146, in Chinese
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Disk-shaped Colloids: the Synthesis and Applications of ZrP Crystals Zhengdong Cheng1,2,3 a, Min Shuai2,b, Andres Mejia1,c, Huawei Li3,d, Zengkai Shi3,e, Jiaoyan Ai3,f, Wei Zhou3, Ying Chen3,g 1Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843-3122, USA. 2 Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA 3 Soft Materials Research Center, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China a zcheng@tamu.edu, b shinerice@gmail.com, c mejia.and@gmail.com, d877624636@qq.com, dshizengkai@163.com, f aijy@gdut.edu.cn, g chenying@gdut.edu.cn Keywords: ZrP, Layered crystals, Orientational stacking, Liquid crystals, Disks.
The two-dimensional materials we studied here are essential for the fully understanding of the behavior of discotic materials and facilitation of their applications.
Kawasumi: Journal of Polymer Science Part a-Polymer Chemistry, Vol. 42 (2004), P. 819 [11] L.
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Materials and Design. 40(2012)212-220
Materials Science & Engineering A. 558(2012)331-337
Materials and Design. 47(2013)590-598
Materials Science and Engineering A. 529(2011)485-491
Journal of Materials Processing Technology. 153-154 (2004) 100-107

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Journal of the Brazilian Society of Mechanical Sciences, 2001. 23: p. 241-252
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Boundary effect to the safety factor of slope in geo-material Weiwei Yu1,a, Xiaoqin Guan1,b, Yihui Li1,c, Hang Lin2,d 1 Nanchang University College of Science and Technology, Nanchang, 330029, China 2 School of Resources & Safety Engineering, Central South University, Changsha, 410083, China ayuweiweincu@126.com, bguanxiaoqin2011@126.com, cliyihuinu2011@126.com, dlinhangabc@126.com Keywords: slope stability; factor of safety; numerical calculation; boundary condition Abstract.
Boundary conditions have great impact on the stability of three dimensional geo-material, like slope, which is one of the oldest applications in geotechnical engineering.
Acknowledgement This paper was funded by Project(11JJ4043) supported by Hunan Provincial Natural Science Foundation of China; Project (2011QNZT086) supported by the freedom explore Program of Central South University; Project (KFJ100306) supported by Open Fund of Engineering Research Center of Catastrophic Prophylaxis and Treatment of Road & Traffic Safety(Changsha University of Science & Technology)，Ministry of Education;.
Journal of Central South University, 16(2009)131-135

Materials and Method Source, Isolation and Maintenance of Bacteria Strains.A total of 27 fecal samples were collected from 18 healthy adult volunteers (9 male and 9 female) and 9 infants (5 male and 4 female).
Then the mixtures were filtered through a 0.45-µm polysulfone filter to remove any undissolved materials.
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This performance limitation of the passive mount needs the study on active and semi-active mounts featuring smart materials which include electro-rheological fluid [1-3], magneto-rheological fluid [4] piezoelectric materials [5,6] and shape memory alloys [7].
Among these, the most promising candidate is the piezoelectric material because of its fast response and easy controllability.
Journal of Intelligent Material Systems and Structures, 16(2005), pp. 931-936 [5] Kim S.
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Introduction Presently, concrete is one of the most commonly used building materials, which plays an important role in all types of buildings and structures.
However, as application environments of buildings become more and more complex, rate dependence of concrete materials has been paid more attention to.
Multi-axis Dynamic Properties of Concrete Concrete materials in actual structures are usually not unilateral to bear load, especially under seismic dynamic load, concrete stress is more complex.
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