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In order to obtain well bore stresses in hostile conditions, a new model is established with cement sheath and formation are treated as different materials.
In this paper, cement sheath and formation are treated as different materials, a new model is established to calculate stresses in casing, cement sheath and formation, and hostile conditions as HP/HT and non-uniform earth stress are included.
Data are obtained under assumption that three materials are linear elastic and isotropic.
Journal of Petroleum Technology.
Journal of Petroleum Technology.

Droeder, Journal of Material Process Technology 117 (2001) 276-281
Droeder, Journal of Material Process Technology 117 (2001) 276-281
Duygulu, Materials Science Forum 419-422 (2003) 177-188
Kuczynski, Journal of Mechanical Sciences 9 (1967) 609-620
Letzig, International Journal of Material Forming 2 (2009) 53-56

Phase Equilibrium of Mg-Nd-Zn System near Mg-Nd Side at 400°C Ming-li Huanga *, Xue Shenb, Hong-Xiao Lic School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China amingli_huang@126.com, bxue_shen@163.com, c hxli@mail.neu.edu.cn Keywords: Mg-Nd-Zn system, Mg-Nd system, phase equilibrium, compound Abstract.
Sachdev, Materials Science Forum, 706-709( 2012) 69-82
Adeva, Metallurgical and Materials Transactions A, 43(2012)4383-4396
Kainer, Advanced Engineering Materials, 8(2006) 235-240
Tsai, Materials Science and Engineering A, 304-306 (2001) 867-870

In fact, there must be damage region between elastic and plastic zone for most materials due to the continuity of deformation.
(6) Where is damage modulus and is depended on the character of materials.
Therefore, only consider these factors synthetically can we understand the deformation nature of materials thoroughly.
Dynamic cylindrical cavity expansion of compressible strain-hardening materials.
Journal of Applied Mechanics.Vol.77,7,2010,041009-1~8

Introduction Composite materials are a combination of two or more materials, differing in form or composition, in terms of macro scale.
Finally the manufacturing process of the composite materials is lower than compared to other materials (steel, concrete etc.).
Materials Science and Engineering 384 (2004) 209-214
Tsai, Thermal conductivity of unidirectional materials, Journal of Composite Materials 1 (1967) 166-173
Yang, The effect of heat-transfer passages on the effective thermal conductivity of high filler loading composite materials, Composites Science and Technology 67 (2007) 1035–1040

With L-glutamic acid as raw materials, N-carboxy-L-glutamic acid-benzyl-anhydride (BLG-NCA) was synthesized by triphosgene.
Introduction Poly-l-glutamic acid (PLGA) is one of the more currently studying poly amino acids materials.
Molecular chains of PLGA have carboxyl side chain of higher activity, it is easy to generate stable complexes with combination of drugs and some are biodegradable in a kind of ideal body of medical polymer materials.
Progresses in modification of poly (γ-benzyl glutamate) [J].Journal of Functional Materials, Vol.38(5)(2007),p.689 [6] Li Liying.
The Assembly Synthesis of Materials-based on Polymer and Anionic Surfactant [D].

Sci. & Tech., Linyuan Road No.4, Xiangfang District, Harbin, Heilongjiang, China. 2The College of Material Science & Engineering, Harbin Univ.
Preparation of composite materials Technological process of composite material was described as follows.
Journal of Applied Polymer Science, 2008, 108, 1629-1635
Journal of Materials Science. 2005, 40: 1079-1085
Study on preparation of SiO2/epoxy resin hybrid materials by means of sol-gel [J].

The Design and Simulation of HPLC’s Structure Zening Xu 1,a, Xiaoxia Wang 1,b, ,Liang Hou1 and Leigang Liu2 1Liaoning University of Science and Technology, Anshan, Liaoning114051, China 2 The wire factory of Anshan Iron and Steel company stock, Liaoning, China axuzening-1@163.com, bwangxiaoxiahhh@126.com Keywords: Chromatographic Column; ANSYS CFX fluid simulation; Structure Optimization Abstract.
As an important part of chromatography instruments, chromatographic column plays an important role in the progress of science and the development of production.
In order to avoid the traditional process ,design - processing- test - Fixed design - re-processing and effectively shorting the design cycle save a lot of manpower, material and financial resources.
ScienceDirect Journal of Hydrodynamics,2010,22(5):40-44

Experiment Materials.
PTFE and silicone are both hydrophobic materials, and therefore, the increased surface hydrophobicity is primarily a result of the surface roughness of the silicone/PTFE composites.
Fergus, Seanlants for solid fuel cells, Journal Power Sources. 147 (2005) 46-57
Lu, Glass-based seals for solid oxide fuel and eletrolyzer cell, Material Science Engineering Research. 67 (2010) 65-85
Buyl, Silicone sealants and structural adhesives, International Journal of Adhesives. 21 (2001) 411-422

They established forming limit stress diagram (FLSD) based on stress and testified the uniqueness of limit stress by testing many materials.
Journal of Materials Processing Technology.
Journal of Materials Processing Technology.
International Journal of Mechanical Sciences，Vol.36(1994), pp.897−910
International Journal of Mechanical Sciences, Vol.42(2000), pp.1−27.