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Researching of the Active and the Passive Damping of Syntactic Foam and Piezoelectric Composite Guangbing Wan a, Zhixiong Huang b, Minxian Shi c, Kun Huang d, Zhaorui Chen e Key laboratory of Advanced Technology for Specially Functionally Materials, Ministry of education, School of Materials Science and Engineering, Wuhan university of Technology, Wuhan 430070, China aewgb0204@163.com,bzhixiongh@whut.edu.cn,cminxianshi@whut.edu.cn, d574276075@qq.com,e88039672@qq.com Keywords: PID Syntactic foam Piezoelectric composite Active damping Vibration Passive damping Abstract.
Passive damping materials are always with excellent performance, such as viscoelastic damping materials, damping composite or smart damping materials[3].
Under the same first-order natural frequency, the amplitude of experimental and simulation results of the two materials change along with the controlling coefficient P increases With the increase of controlling coefficient P, the amplitude of the two kinds of cantilever beams decrease.
Under the same initial amplitude, the amplitude of experimental and simulation results of the two materials change along with the controlling coefficient P increases Under the same initial amplitude, the amplitude of piezoelectric composite decreases much more than syntactic composite.
Journal of vibrate and shock. 2009. 28(3)

Reiterman, Measurement of Volume Changes of High Performance Cement Based Composites, Applied Mechanics and Materials, Vol. 827, pp. 328-331, 2016
Reiterman, Low cost cement floor screed, Materials Science Forum 824 (2015) 77-80
Reiterman, Assessment of the air-entraining effect of rubber powder and its influence on the frost resistence of concrete, Romanian Journal of Materials 46(3) (2016) 405-413
Zatloukal, Relation between parameters of plasters measured by non-destructive and destructive methods, Key Engineering Materials 677 (2016) 211-214
Jameel, Nondestructive test methods for concrete bridges: A review, Construction and Building Materials 107 (2016) 58-86

Introduction Carbon fiber composites materials are widely used as preferred structural materials for aerospace engineering, because of its excellent mechanical properties such as high specific strength, high specific modulus, light density, dimension stability, good heat resistance and material properties can be designed [1].
Experimental materials and experimental method The material used for the test was carbon fiber / epoxy composite laminates.
Kelly: Composite Materials for Aircraft Structures.
Hocheng: Journal of Materials Processing Technology Vol. 62 (1996), p. 54 [5] M.
Aglan: Journal of Applied Polymer Science Vol. 113 (2009), p. 3156 [6] T.

They represent one of the strongest and toughest materials as known.
Experimental Materials.
Mechanics of Materials Vol.41 (2009), pp. 1108
Materials Science and Engineering A Vol. 485 (2008), pp. 508
Journal of Power Sources Vol.195 (2010), p. 263

The fundamental formula of the mechanics of materials is derived under the equal-section assumption.
This local stress is critical for the mechanical properties of the materials, especially for the members which are manufactured by the brittle materials[5], This stress change has a great impact on the safety of aerospace vehicles.
Mechanics of Materials.Beijing: Higher education press, 2012
Mechanics of materials handbook.
Mechanical Formulars applied Handbook.Beijing: Science press, 2015

The Model of Residual Stresses in Burnishing In this section, the formation of residual stresses is divided into two stages: indentation of tool into the treated material and release of tool from the treated material.
With the increase of burnishing force, the surface of the treated material continues to deform and some points start to yield where the stress strength reaches a critical value equal to the yield strength of the treated material.
The material parameters of AISI 1042 steel in J-C model are A = 553.1 MPa, B = 600.8 MPa, m = 0.234.
Acknowledgement The paper is supported by the National Science Foundation of China (Grant No. 50975095) and the Guangdong-Hongkong Key Project (Grant No. 2008A011600002).
Korzynski: Journal of Machine Tools and Manufacture, Vol. 47 (2007) No.12-13, pp.1956

The mechanical concepts of the homogeneous elastic material are still apply to the reinforced concrete beam, but since it is non-elastic material and in uneven quality, so its sectional flexural stiffness is not constant but changed.
In mechanics of materials, the section stiffness is established by the relationship between the internal force and deformation:(1) the geometric relation of the strain and curvature given in the plane section assumption; (2) the physical relationship between stress and strain given in hooke's law for elastic material; (3)the equilibrium relationship between stress and internal force given by linear stress distribution.The above three relations are not applicable for the reinforcement beam after cracking.
[4] Omer Chaallal, Mohsen Shahawy and Munzer Hassan: ACI Structure Journal, Vol. 99 (2002).p.335 [5] Janet M.Lees and Chris J.
Burgoyne: ACI Structure Journal, Vol. 96(19993).p.377 [6] Zhoudao Lu, Tao Hong and etc.
Industrial Construction.Vol.33 (2003).p.8 [7] Yahong Ding, Chunsheng Zhang, Xiantao Zeng and Xiaolin Yang: Proceeding of 9th National Conference on shock & Impact Dynamics. 2009 [8] Yahong Ding, Huimin Li and Xiantao Zeng: Journal of Liaoning Technical University (Natural Science Edition).Vol.28(2009).p.949 [9] Xiantao Zeng, Xingguo Wang and Yahong Ding: Journal of Henan Polytechnic University, Vol.21(2002).p.222 [10] Xiantao Zeng, Jingmin Duan and Yahong Ding: Engineering Mechanics.

Machining Science and Technology. 16(2) (2012) 157-172
Journal of Mechanical Strength. 31(1) (2009)88-94
International Journal of Machine Tools and Manufacture. 47(9) (2007)1333-1341
International Journal of Machine Tools and Manufacture. 47(9) (2007)1368-1380
International Journal of Heat and Mass Transfer. 66(2013)444-450.

Fig. 2 NU2218E 3D model and design parameters Define unit and material parameters.
Solid226 is a 20-node, 6-degree-of-freedom solid unit with hybrid analysis capabilities for elastic deformation analysis of incompressible materials.
GCr15 was selected as the bearing material for analysis, and the material parameters are shown in Table 1.
Journal of Beijing Institute of petrochemical technology, 2001 (01): 32-38 [5] Jia Dongsheng, Zhang min.
China Railway Science, 2002 (02): 86-94 [8] Chen Jiaqing, Zhang Pei, Xu Linlin.

In recent years, due to its advantages of saving the raw materials and a relatively fast speed of processing, the ultrasound technology has been more and more widely applied in the wet processing of textiles, including bleaching, desizing, dyeing, scouring and so on [3-6].
Experimental Materials.
The ultrasonic-assisted chlorine bleaching washing could accelerate the washing speed and achieved a good bleaching effect, and could simultaneously save more energy and raw materials.
Journal of tianjin polytechnic university, 2012, 2(31):43-46
The Mechanism of Ultrasonic Bleaching, Journal of textile research, 2001, 22(4):46-47