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Joints used to fasten different parts are the source of local non-linearity with predominance of contact damping in comparison to inherent material damping.
The material properties of plate structure are optimized to match the modal frequencies from the Experiment Modal Analysis (EMA) of freely hanging plate structure.
Klumpp, Analysis of slip damping with reference to turbine blade vibration, Journal of Applied Mechanics. 23 (1956) 421
Mikic, Area of contact and pressure distribution in bolted joints, Transactions of ASME, Journal of Manufacturing Science and Engineering. 94(3) (1972) 864-870
Etsion, Analytical Approximations in Modeling Contacting Rough Surfaces, Journal of Tribology .121 (1999) 471-493

Introduction The double glow plasma surface metallurgy technology [1] is an advanced method for surface alloying with self-dependent intellectual property by Chinese scholars, which has great advantages in diffusion speed, bonding strength, energy consumption, materials saving and so on [2].
[4] Y.Gao, J.Y.Xu, Q.Gao, J.P.An and Z.Xu: Engineering Science Vol. 10 (2008), P. 27.
Xu: Plasma Surface Metallurgy (Science Publishing, China 2008).
[8] Z.H.Li, X.P.Liu and Z.Xu: Journal of Applied Sciences Vol. 18 (2000), P. 185.
[9] Y.Zheng and Y.Gao: Materials Review Vol. 22 (2008), P. 139.

Nominal elastic modulus of filling materials didn’t much affect the yield strength and yield displacement of the second seismic fortification line, but made significant effect on post-yield strength.
The interspaces between the first and second seismic fortification line are filled with lightweight materials.
Factors that affect bearing capacity of grid framework.There are several factors affect bearing capacity of grid framework in structure[4]: number of grid beams and grid columns, dimensions, amount of steel bar, concrete grade, elastic modulus of filling materials, etc.
As the figure shows; as the first seismic fortification line, filling materials’ nominal elastic modulus don’t much affect yield strength and yield displacement of the second seismic fortification line, but make significant effect on post-yield strength.
As the first seismic fortification line, filling materials’ nominal elastic modulus don’t much affect yield strength and yield displacement of the second seismic fortification line, but made significant effect on post-yield strength.

Material type 24 (mat_piecewise_linear_plasticity) are used for simulation of metallic materials.
Material type 54 and 55 (mat_enhanced_composite_damage) are used for simulation for the composite materials in this study.
The material properties for E-glass/epoxy composite and carbon/epoxy composite are given in Table 1.
Table 1: Material properties of steel SPHC [8].
[6] Abvabi, A., et al., : Journal of Zhejiang University - Science A 11(2) (2010), 97-105

Following this early work, experiments on superplastic flow spread to many laboratories around the world so that it is now an established research activity in the field of Materials Science.
Al-Mg-Sc alloys are excellent candidate materials for achieving high superplastic elongations when pulling in tension.
Langdon, The mechanical properties of superplastic materials, Metall.
Langdon, Deformation mechanism maps for superplastic materials, Scripta Mater. 10 (1976) 759-762
Langdon, Review: achieving superplastic properties in ultrafine-grained materials at high temperatures, J.

Superhydrophobic surface preparation technology and its progress Wei Liu1, Qunjie Xu1,* a, Jie Han1 1 Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, 2103 Pingliang Road, Yangpu District, Shanghai, 200090, China axuqunjie@shiep.edu.cn Keywords: superhydrophobic surface; research progress; review Abstract: With the wide application of various functional materials, corrosion problems have not only caused huge losses in economy but also made a waste of energy and resources.
Superhydrophobic surface treatment technology, which is a new anticorrosion technology, can inhibit the corrosion of various functional materials effectively.
Therefore, the research and development with special surface superhydrophobic surfaces for expanding the scope of application of the material and improve the performance of materials, etc. has a very important significance.
Gao, et al: Corrosion Science Vol. 80 (2014), p. 177
Guo, et al: Journal o f Northwest Normal University ( Natural Science) Vol. 3 (2011), p. 54

Structural elements made out of either isotropic or anisotropic materials can be inspected.
Pawel Malinowski would like to acknowledge the support from the Foundation for Polish Science.
Felgeyrolles, Effect of water absorption on strength of the aeronautical composite material Fiberdux HTA/6376, Key Engineering Materials, 417-418 (2010) 457-460
Ostachowicz, Removing the ambiguity in Lamb wave-based damage localization, Key Engineering Materials, 413-414, ss. 79-86, 2009
Lu, Guided Lamb waves for identification of damage in composite structures: A review, Journal of Sound and Vibration 295 (2006) 753–780

Equipment and Materials The moment and coefficient of friction were chosen as the characteristics under study.
It should be clarified that for all selected lubricant coolant 10% concentration is recommended for use for the treatment of most structural materials.
For a full study of various lubricant coolant characteristics, additional tests are also required, such as determining for various materials corrosion resistance after treatment with the above compositions, surface roughness determining and others.
Ryukanov, Optimization of process control and cutting modes of turning of structural materials, Mechanization of construction. 11 (857) (2015) 40-45
Vorontsov, Determination of optimal cutting conditions, Reference, Engineering journal with the application. 5 (2017) 2-5

Electromagnetic waves heating utilises electromagnetic radiation to induce electric field in a conductive material that causes the material to be heated.
Electromagnetic waves energy is converted into heat due to the interactions of the delocalized π-electrons in carbon materials with the electromagnetic waves [9].
The work by Abdul Karim et al. [13] to determine the temperature when micro plasma occurred when using electromagnetic waves found that materials such as aluminium and brass achieved high spark temperatures at low microwaves levels as compared to mild steel and stainless steel.
Matti Maricq, Ning Xu: Aerosol Science Vol. 35 (2004) p. 1251-1274. [2] K.
Mat Jamlus: Journal of Applied Sciences Vol. 12 (2012) p. 2338-2345. [10] M.

XRD was used to get structural characterisation Materials and Method Materials.
Nature materials. 5(12) (2006) 962-965
Hums, Optimization of hydrothermal synthesis of pure phase zeolite Na-P1 from South African coal fly ashes, Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances and Environmental Engineering, 47(3) (2012) 337-350
Advanced Materials Research 512 (2012) 1757-1762
Materials 6 (2013) 2074–2089.