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The stiffness of rotor system is generally nonlinear due to the application of new materials with nonlinear physical characteristic and the increase of rotating speed and load, such as the rotor system made of alloy material, composite material and common material under high temperature, whose relation of stress and strain is nonlinear function.
Both ends of rotor are supported by journal bearings with symmetrical structures.
DC120101011) and supported by the Natural Science Foundation of Liaoning Province, China (No. 201202041).
Zhang: Stability and non-linear responses of a rotor bearing system with pedestal looseness, Journal of Sound and Vibration, Vol. 241(2001), p. 879-893
Shaw: Chaotic dynamics of a slender beam rotating about its longitudinal axis, Journal of Sound and Vibration, Vol. 124(1998), p. 329-339

The shortcoming of the classical model lies in the neglect of surface energy or surface stress, which plays a key role in adsorption-induced swelling or desorption-induced shrinkage of porous materials.
Acknowledgements This work was supported by the grants from the National Science Foundation of China (No. 41172116, No.
Mendiboure: Revisiting poromechanics in the context of microporous materials.
Journal of the Mechanics and Physics of Solids 61, 537–556 (2013) [8] G.
International Journal of Coal Geology 77 (1-2), 127-136 (2009) [9] J.

Taking steel-plastic composite reinforced band (CAT) and gravelly soil as the test materials, the pullout tests of reinforced band in gravelly soil with different water contents have been carried out by the laminated shear test instrument.
The reinforced materials in the above research are mostly geo-grid or soil fabric and the filling materials are sand or clay, in which little research was made on reinforced band, and the water content was seldom considered as the factor on the pulling characteristics of reinforced soil.
The earth is calculated as below--pulling friction factor of geosynthetics materials: (2) Where p is the normal pressure; is the pulling friction strength corresponding to p.
Journal of Geotechnical and Geoenvironmental Engineering, Vol. 129 (2003), p 361-371
Journal of Shijiazhuang Tidao Nniversity (Natural Science), Vol. 23 (2010), p.46-52

Experimental sSection Organization of the Text Materials and reagents.
Required materials include silver nitrate (AgNO3), Rhodamine6G (R6G), ascorbic acid (ASA), gold chloride (HAuCl4), trisodium citrate, dihydrate (Na3C6H5O7·2H2O) and ethanol, all analytically graded, and further purification is avoided.
Clem: submitted to Journal of Materials Research (2003) [5] P.G.
Ozaki, Semiconductor materials in analytical applications of surface-enhanced Raman scattering, Journal of Raman Spectroscopy, 47 51-58
Zhang, Graphene-Based Enhanced Raman Scattering toward Analytical Applications, Chemistry of Materials, 28 (2016)

Mechanical fasteners are commonly employed to facilitate joints in composite materials but there are disadvantages including fretting and fibre discontinuity e.g. [2] and with increased parts count, increased weight.
Pultruded materials are non-homogeneous in the through thickness direction, as the material is made up from an internal layer of unidirectional (UD) with a Chopped Strand Mat (CSM) layer on the outside surfaces.
The maximum signal will occur in the adhesive layer (the lightest shades in the TSA plots in Figure 2) due to the materials thermoelastic response.
Jauslin, C. and Pellicane, P.J., "Finite-element analysis of wood joints," Journal of Materials in Civil Engineering, 7(1):50-58, 1995. 7.
Boyd, S.W., Dulieu-Barton, J.M., and Rumsey, L., "Stress analysis of finger joints in pultruded GRP materials," International Journal of Adhesion and Adhesives, 2005.

The compositions of the fresh municipal solid waste materials are shown in Fig.1.
The test materials are mixed uniformity according to the selected proportions.
Wu: Advanced Materials Research.
Wu: Advanced Materials Research.
Guo, in: Chinese Journal of Geotechnical Engineering 20(5) (1998), p. 1-6 [8] A.

For example, critical slip surface must be assumed for limit equilibrium method, upper and lower limit analysis and variational methods and they are not applied to non-homogeneous materials, especially for strength-uneven works of rock accumulation body.
Yunnan Provincial Department of Education Science Foundation of China, (ID: 6Z0139D) References [1] Hongqi Chen, Runqiu Huang, Feng Ling, Space of large deposit slope engineering effect research [J], journal of geotechnical engineering, 2005, 27 (3) : 323-328 [2] Haimin Li, Ruihui Zhong, Cheng Liu, Yunnan Xiaowan hydropower station water diversion ditch deposit anchor cable construction technology and the improvement design [J], journal of geological hazards and prevention, 20 (16) : 7-11 [3] Xiumei Din.
I: 36-37 [6] Liu Yuan, Fuxing Miao, Tiande Miao, power transmission and distribution in two dimensional particle deposit research [J], journal of geotechnical engineering, 2005, 27 (4) : 468-473 [7] Behringer R P,The Dynamics of flowing sand [J], Nonlinear Science Today, 1993, 3 (3) : 2-15 [8] Liu C h, Mr Nagel S R, eta1, Force fluctuations in bead packs [J].
Science, 1995269:513-515 [9] Wittmer J P, et a1.
Journal of geotechnical engineering, 1999, 21 (5) : 591-594

Engineering Sciences, vol.3 (2000) ， p. 2-5
Journal of He bei Institute of Technology, vol.28(2006), p.44-47
Chinese Journal of Computational Mechanics, vol.11(1994), p.63-67
Journal of Mechanical Transmission, vol.31 (2007), p.81-82
Journal of Mechanical Transmission. vol.33(2009), p.27-31

As a result, simplification of complex geotechnical materials may cause large errors between calculated value and true value.
Acknowledgements The work reported here was supported by National Natural Science Foundation (No.51178122) of China, the Natural Science Foundation(No.
(in Chinese) [2] Qiujuan Zhou, Xiaopin Chen , “ Experimental study on creep characteristics of soft soils,” Chinese Journal of Geotechnical Engineering, Vol.28(2006), p.626-630.
(in Chinese) [5] Xianwei Zhang , Changming Wang, “ Empirical creep model for saturated soft soil,” Journal of Central South University(Science and Technology) : Vol.42 (2011), p.792-797
Journal of Engineering Geology, Vol.16(2008), p.508-592.

Preface The presented special issue is dedicated to the recent achievements in materials science and materials processing technologies used in modern mechanical engineering.
Here are investigated the lubrication features in the journal-bearing systems and induction-treated linear guides in the transmission elements, fatigue crack propagation in aluminium alloy under four-point bending and mechanism of multi-particle erosion of the iron target.
The next chapter contains articles on materials and technologies used in opto- and microelectronics.