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These results show that the electrical properties can be improved by control of the microstructures.
The electro-mechanical coupling factor and piezoelectric constant of NKN-5LT ceramics were improved in the samples with A-site ions excess NKN-5LT.
Electrical properties of K2O excess NKN-5LT ceramics.
These results show that the electrical properties can be improved by control of the microstructures.
The excellent piezoelectric and electromechanical properties in modified NKN-5LT ceramics indicate that this system is potentially good candidate as lead-free material for a wide range of electro-mechanical transducer applications.

The analysis of factors affecting the state of the metal of pipelines of heating networks on the territory of hazardous production facilities is carried out, of which the effect of mechanical loads should be especially distinguished.
All these factors lead to deterioration of the mechanical properties of the metal as a result of aging; in addition, various stress concentrators can be present in the metal.
Despite the large number of operating conditions used in the design and strength calculations of main pipelines, all the factors of pipeline operation are often difficult to take into account, since in most cases the calculation results change significantly due to the simplification of the design schemes, inaccuracy of the initial information, changes in operating conditions, etc.
(Moscow: Mechanical Engineering) p 511
[22] Kultaev MA 2018 Innovations in information technologies, mechanical engineering and vehicles.

The article presents selected carried out tests of mechanical properties focused mainly on the determination of ultimate tensile strength of two PLA-BIO plastic extruded horizontally along the width produced by FDM method, Rapid Prototyping.
The shape of test specimens for unreinforced samples is set out in standards EN ISO 527-2 Plastics - Determination of tensile properties, Part 2: Test conditions for molding and extruded plastics.
Fig. 4 Measurement of test samples Implementation of Experimental Tests to Determine Tensile Properties The course of experimental tests to determine tensile properties were recorded using a testing machine in which incorporated sensors record the results in computer software and are subsequently evaluated.
Pandová, Progressive technology diagnostic and factors affecting to machinability, Applied Mechanics and Materials 616 (2014) 183-190
Zelenak et al., Comparison of mechanical properties of surface layers with use of nanoindentation and microindentation tests, Metalurgija 51/3 (2012) 309-312.

Student of Mechanical Engineering, K.N.
However, some machining factors affecting the quality of the finished surface in nano-metric cutting are yet to be investigated in detail.
The EAM potential has been very successful in modeling the elastic properties, defect formation energies and fracture mechanisms of various bulk metals [11].
Distribution of Dislocation The density of dislocation is a criterion of the deformation of the machined surface, which affects the mechanical and physical properties of the metal.
· Dislocations can affect on machined surface properties.

Low durability and compressive strength are the main factors that led to the development of different strategies of enhancement taking even under consideration the surroundings.
Nanoparticles can alter the properties of materials and improve the pore structure, which in turn affects their durability.
As advanced materials, nanoclays enhance the physical and mechanical properties, can reduce permeability and offer protection against environmental factors, such as chemicals, moisture and gases [34-36].
Apart from the physical properties tested, the mechanical properties of the samples were examined as well.
Mechanical properties of the materials.

China 2Department of Mechanical Engineering and Manufacturing, Zhangjiajie Institute of Aeronautical Engineering, Zhangjiajie 427000, P.R.
The proper materials used for the frame are one of the key factors to impact the performance of the motorcycle [1-3].
Fig.9(b) shows the metallograph of the heat-affected zones close to the cracks, where the crystal grains were much bigger than those in the matrix structure and the directivity of crystal grains was primarily eliminated.
Table 1 Comparison of the chemical compositions and mechanical properties of the initial and replacing steel materials C Mn Si S P σS σb δ Initial material Q195 0.06~0.12 0.25~0.5 ≤0.3 0.05 0.045 ≥195 315~390 ≥33% Replacing material 0.42~0.5 0.5~0.8 0.17~0.37 0.035 0.035 ≥345 ≥510 ≥28% Chemical compositions Mechanical properties Q345 The square tube of the frame with thickness of 2mm was easily over welded.
Table 1 compares the chemical compositions and mechanical properties between the initial material, the Q195 steel, and the replacing material, the Q195 steel.

Finite element analysis for performance of cap seal rings in the Stirling engine piston rod Chang Jun1, a 1School of Mechanical Engineering, Lanzhou University of Technology, Lanzhou city, Gansu province, China achangjun0931@163.com Keywords: Rod seal; cap seal structure; stress analysis; Finite Element Analysis.
Abstract: Cap sealing reciprocating seals are dry friction conditions, the paper separately from the main factor moving the cap seal sealing mechanism, wear mechanism, elastic modulus theoretical analysis of its sealing properties and tribological law.
Introduction Stirling engine as key components of plate type heat generators system, its performance directly affects the working efficiency of plate type heat power generation system.
Because the cap seal is under the condition of dry friction of reciprocating dynamic seal, so the factors for influence effects of cap seal is complex.
Summary This paper, using the finite element software ANSYS to analysis the cap sealing in the “installation” state and mechanical properties under medium pressure at working, studied the cap type sealing ring contact stress and the Von Mises stress regularities of distribution with the change of sealing medium pressure, It is possible tear failure location for sealing rings, O shaped rubber ring contact began form center, and along the top of the piston rod contact position, this conclusion in order to further improve the sealing performance of Stirling engine piston rod sealing device and, provides a way to predict sealing rings of tearing failure location.

This paper uses stereographic projection to analyze and judge high-cutting slope stability formed by artificial mechanical excavation in Qingxi, and decisive factor of stability according to deformation and fracture and the trends in the high-cutting slope regional, puts forward the high-cutting slope control measures and methods to ensure slope stability and security.
High-cutting slope formed by artificial mechanical excavation in the process of the construction of resettlement housing.
Once the slope destruction, it will be severely threat people's personal property security to the three gorges reservoir area of the high cutting slope settlement, and affect the traffic.
B-C segment of tangential slope of 12.33m long, 9.4-10.0m high, mainly affects residential buildings.
Commonly, affect smaller the whole stability.

Therefore, the weldability, the welding procedure and parameters as well as the overall properties of T24 weld joints must be carefully studied and analysed.
The chemical composition and the mechanical properties of the used material are presented in Tables 1 and 2, respectively.
Kubon, Aplication properties of T24 welded joints for boiler waterwalls, in: PROMATTEN 2011. 1. issue.
Pecha, Experience with utility properties of the T24 steel, in: Zvaranie Svarovani-61. 1. issue.
Mohyla, Influence of the heat treatment temperature on the mechanical properties of low alloy creep resistant steel welded joints, in: 20th International Conference on Heat Treatment.

While several factors can affect a lens biocompatibility, perhaps the most important is the wettability of the lens; therefore gas permeable lenses form a compromise between the hard and soft lenses.
In this method, the final power and shape of the finished lens is dependent on several factors.
All these factors contribute to the final lens geometry [3].
Table 1 shows an overview of the thermo-mechanical properties of the RSA-905 grade compared to other optical mould materials.
Mechanical and thermal properties of RSA aluminium compared to other optical mould materials [9] Optical mould materials RSA-905 Copper alloy Steel + NiP NiP plating AA-7075 Principal elements Density (g/cm3) Al, Ni, Fe, Cu 2,95 Cu, Ni, Si, Cr 8,72 Cr Mo Steel 7,8 Cu, Mg, Zn 2,85 Mechanical prop.