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Since coal beds are anisotropic, their strength properties vary depending on the orientation of the breaking load relative to the directions of lamination and fracturing.
Materials and Methods The nature of anisotropy and the degree of its influence on strength properties are considered on the example of coal beds of the Vorkutsky field.
The occurrence and development of “general” fractures in the zone of “visible” pressing of the formation and, therefore, parameters and shape of dislocations depend on the joint effect of many factors: laminar structure of the formation, parameters of fracturing systems of the formation and side rocks, properties of soil and roof rocks and the degree of their relation to coal formation, method of roof control, parameters of a working face, intensity of works, etc.
At the same time the implementation of parameters of the majority of the specified factors has a random character at each specific moment.
All modern mining and tunneling harvesters and levelers do not have the selectivity of face processing, adaptation of parameters of cuts and cutting modes (change of speed, thickness, direction of a cut, as well as type of active forces) to changing conditions and zone structure of formations according to their physical and mechanical properties [10–13].

The decision of the strategy that will be followed can affect the accuracy, the surface finishing, the forming forces, etc.
The factors that affect the accuracy are shown in [9], as well as some strategies to improve it.
· External surfaces of forming tool were meshed with shell elements in combination with a rigid material defined with steel material properties
But during the development of this work some other factors have been detected and should be taken into account.
Conclusions Tool path generation is one of the most important factors that must be taken into account in ISF process, because of the effects on the final formed shape.

By the comparative analysis of the results from above two models, the numerical simulation model was improved and on this basis, some factors such as Young modulus E, confining pressure and initial stress of grout and medium and the anchorage length and so on, affecting the distribution and diffusion of shear stress for two interfaces of anchorage type structures were discussed.
Contact pair whose major parameters coming from laboratory test was adopted for simulating the mechanical behavior of shear stress on two interfaces.
At the same time, the Fig.14 shown the diffusion law of linear property of bond stress along the radial direction (far from the pull-out zone).

Immersion in seawater does not affect low-cycle fatigue, however, high-cycle fatigue behavior shows significant differences.
In addition to their excellent corrosion and fouling resistance [2], their high mechanical strength compared to conventionally used nylon is one of the advantageous properties of copper alloys.
However, testing of the changes in mechanical properties of this alloy [5] showed overall softening due to 1-year exposure to natural seawater: reduction in ultimate strength of about 7.5% and increase in ductility of about 5.5%.
J., 1979, “The effect of environment and applied current and potential on the corrosion fatigue properties of an as-cast duplex aluminium bronze alloy.
[5] Drach A., Tsukrov I., Gross T., Hofmann U., Aufrecht J., and Grohbauer A., 2012, “Corrosion rates and changes in mechanical properties of copper alloys due to seawater exposure, IMECE2012-88156,” Proceedings of the ASME 2012 International Mechanical Engineering Congress & Exposition, Houston, TX, USA.

From point of view of temperature generated during machining of aluminum alloys, and of its influence on the cutting tool, there is not a major problem, because their low melting point is not able to alter the mechanical properties of the cutting tool, the wear especially, [1].
But, as it is know, due to the high thermal conductivity of aluminum alloys a large amount of heat generated is absorbed by the workpiece and, and sometimes, this phenomena can affect the dimensions and surface quality.
Studying the influence of the cutting parameters (depth of cut, feed rate and cutting speed) on the cutting temperature during turning of an aluminum alloy, 6083 type, in [5] the authors found that the depth of cut is the major factor that affects the cutting temperature, then feed rate and squared cutting speed.
[5] A.Kannan, K.Esakkiraja, Dr.M.Nataraj, Modeling and Analysis for Cutting Temperature in Turning of Aluminium 6063 Using Response Surface Methodology, IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE, Volume 9, Issue 4 (Nov. - Dec. 2013), pp. 59-64
[6] Piotr Zgorniak, Anna Grdulska, Investigation of Temperature Distribution during Milling Process of Az91hp Magnesium Alloys, Mechanics and Mechanical Engineering, Vol. 16, No. 1 (2012), pp. 33–40 [7] *** Milling cutters - Guhring catalog [8] *** Datasheet handheld thermometers of Optris MS series.

Implementation of Off-line Programming for Robot Roller Hemming Jianqiang Wang1, a, Lusheng Zhu1, b, Zhonghua Wang1, c,Jian Yang 1, d, Donghua Tang2, e 1 School of Mechanical Engineering and Automotive, Hefei University of Technology, Hefei, 230009, China 2 JEE Automation Equipment Company, Hefei, 230009, China aemail: jianqiangwang@126.com, bemail: royalzls@163.com, cemail: 631712432@qq.com, demail: oyj0524@126.com, eemail: tangdonghua@jee-cn.com Keywords: Roller Hemming; Trajectory; Calibration; OLP Abstract.
Calibration of hemming tool As a significant factor affecting the quality of production, it is inevitable to control the pressure of roller hemming.
The operator calibrates the tool or spring by using a pressure measurement device and a modified vernier caliper. (1), (2) was the mathematical expression for the mechanical property of spring which was also shown in Fig.9
Mechanical property of spring Fig.10.

The heat conduction in the contact is dependent on several factors as the material roughness, the asperities shape and size...
This is fixed with a cement paste providing thermal properties close to resin one so as to limit heat flow perturbation induced by the hole.
Their thermal properties (Table 1) can be considered constant on the studied temperature range 20-400�C.
The resin properties have been measured for different temperature values (20, 120, 250 and 400�C) and no significant variations have been observed (<5%)[7].
As the rheological properties of the phenolic material is affected by the temperature, this could induce larger contact zones at microscopic level and then makes easier the conductive transfers between the two parts.

In spite of the process temperature being lower that of in fusion welding, the heat affected zone (HAZ) is still the main problem for enhancing the mechanical strength of a FSW joint [2, 3].
It is common to divide the cross section view of the FSW joint into three zones as follows: stir zone (SZ), thermomechanically affected zone (TMAZ) and heat affected zone (HAZ) [11].
Thermomechanically affected zone.
Heat affected zone.
Mondolfo, Aluminum alloys: structure and properties, Butterworth, London-Boston, 1976

Introduction The welding deformation is the most important factors on welding quality.
However, due to numerous factors involved in welding process, it isn't applicable to predict welding deformation just depending on experiments data, especially for the large structure.
The directed method of thermo-mechanical coupling was taken to simulate welding process in this paper.
The coupling element solid5, the material property which changed with temperature and the bilinear isotropic hardening material model BISO was selected to establish FE model.
It will not only increase the cost but also change the distribution of residual stress, and also will affect fatigue strength and fatigue life of bogie frame.

Their limited osteogenic potential and their low mechanical properties are one of their main drawbacks compared to bone grafts[3, 4].
All these parameters have a specific influence on bioceramics final mechanical properties too [11].
The biological, chemical, and mechanical properties at the bone/material interface are therefore essential to ensure a good osteointegration of the implant[22].
Biofunctionnality of CaPCs is limited by low initial mechanical properties compared to host bone ones.
Mundy: Growth Factors. 22. (2004), 233-41 33 M.