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A simple and easily understandable model was proposed for predicting the relative importance of different factors (composition of the steels and Electro Discharge Machining processing conditions) in order to obtain an efficient pieces.
Indeed, it is the portion of the base metal that was not melted during brazing, cutting or welding, but whose microstructure and mechanical properties were affected.
The second developed a genetic expression programming (GEP) method and a mathematical relationship has been suggested between the GEP model, surface roughness and parameters affecting it and find that this relationship allows determine roughness values of materials with similar properties very close to the experimental values.
Hence, it is expected that one of the most important factors to affect material hardness is the strain rate effect.
Properties of metal dissolution by electroerosion, Canadian Journal of Analytical sciences and spectroscopy (2003)

Fiber reinforcement is widely used in construction engineering to improve the mechanical properties of concrete such as compressive and tensile strengths.
In the construction industry, strength, durability and cost are among the major factors for selecting the suitable construction materials.
This could affect the water cement ratio which is considered to be important factor in concrete strength.
The sisal fibers absorbs much water which is added during mixing, which in turn results in the reduction of water-cement ratio (W/C), which is a major factor affecting the concrete strength.
[3] Wycliffe Odegi Ngala, “Mechanical Properties of Sisal Fiber Reinforced Composites of Epoxy Resin and Rice Husk Ash Pozzolanic Cement”.

In the present work we report on the effect of pre-deformation followed by/together with artificial aging on the mechanical properties as strength, ductility and work hardening of an Al-Mg-Si alloy (AA6060).
The aging behaviour and mechanical properties have been characterized in terms of Vickers hardness and tensile testing.
It is found that small, even very small, pre-deformations strongly affect the aging behaviour and associated tensile properties.
The main hardening precipitates are expected to be β’’, which contribute significantly to the final mechanical properties due to their small size and homogeneous distribution.
However, this is counterbalanced by the strain hardening contribution from pre-deformation to the final mechanical properties.

This article proposes a recycling technology of waste thermosetting phenolic resin based on mechanical and physical method, analyzes experimental factors on degradation effect of thermosetting phenolic resin by orthogonal test , and to select the optimal technology parameters.
The orthogonal test program which has a total of nine tests is L9(34) by factors and levels ,and table .1 shows orthogonal head design[5].
Various factors differently affect degradation effect of thermosetting phenolic resin,and the primary and secondary order is A>D>B>C.Speed A has a certain impact on experimental result while feeding particle size D,time B is limited, feeding material weight C hardly has significant impact.
(2)Mechanical and physical effects not only change the physical properties and morphology of thermosetting phenolic resin which material forms new surface and particle becomes tiny,but also change the molecular structure and chemical properties of thermosetting phenolic resin which molecular chain is broken, the activity of functional groups is increased and the cross-linked structures is destroyed .So thermosetting phenolic resin that is degraded restores the ability of a certain reversible plasticity
(3) The primary and secondary order of four factors on degradation effect of thermosetting phenolic resin is A>D>B>C.

Review of Mechanical Properties and Durability of Concrete Containing Nano-particles Jixiang Gao1, a, Peng Zhang1, b and Xiaobing Dai1, c 1College of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, China agaojixiang2010@163.com, bzhangpeng8002@163.com, cdaixiaobing2010@163.com Keywords: Concrete, Nano-particles, Mechanical properties, Durability.
In order to in-depth understand the characteristic of the concrete containing nano-particles and promote the application of the concrete containing nano-particles in practical engineering, a series of research works on the mechanical properties and durability of the concrete containing nano-particles were summarized based on the current study results.
Study of Mechanical Properties of Concrete Containing Nano Particles Study results have shown that the volcanic activity of SiO2 (NS) is far higher than that of silicon powder.
Study of Anti-freezing Performance of Concrete Containing Nano Particles In the cold region, freezing and thawing cycle is one of the important factors that affect the durability of concrete.
Conclusions From the above-mentioned related research results on the properties of the concrete containing nano-particles, it can be concluded that the addition of nano mineral powder (nano-SiO2, nano-CaCO3) in concrete has significant improvement on the strength and durability performance of the concrete.

Study on Influencing Factors on Reliability of Permanent Magnet Synchronous Motor System in Electric Vehicle Kaili Yang1,a, Qiang Song1,b 1School of Mechanical and Vehicle, Beijing Institute of Technology, Beijing 100081, China ayangkl17@163.com (Kaili Yang), bsongqiang@bit.edu.cn(Qiang Song) Key words: Electric vehicle, PMSM, Reliability, Temperature Abstract: In this paper, based on the working environment and characteristics of PMSM (permanent magnet synchronous motor) system in EV, the influencing factors and their action mechanism on the weak links with high failure rate are analyzed, concluded from the failure modes of PMSM system in EV.
In this paper, the PMSM system of electric vehicle is studied for its failure modes and reliability influencing factors.
In summary, the thermal stress has significant effects on operation reliability of all the key components of the drive-motor system, meanwhile, other factors, such as overvoltage and overload, indirectly affect the system reliability through temperature.
Any short-term high-temperature or over-voltage may impose irreversible effects on the insulation and even cause immediate failure. [3] High temperature will accelerate the physical and chemical reactions of insulating materials, deteriorating the insulating material properties and accelerating insulation aging.
Therefore, the motor operates with vibration and loud noise, directly affecting its operational reliability.[7] Under the same load, the motor bearing performance decreases as the temperature rises, and even burns to failure suddenly.

The physical and mechanical properties of the PALF are given in Table 1.
Physical and Mechanical properties of PALF.
Besides that, crystallization, branching, frequency of the applied voltage, and temperature also affect these properties [15].
Mechanical properties of pineapple leaf fiber reinforced polyester composites.
Dynamic mechanical properties of pineapple leaf fiber polyester composites.

The determined technological properties were: dry apparent density, linear shrinkage, water absorption and mechanical strength (three point bend test).
These factors resulted in a reduced open porosity, improving water absorption and linear shrinkage.
These factors result in productive system difficulties, causing prejudice to the technical quality, as high water absorption and low mechanical strength, and/or production cost increasing.
Therefore, the objective is to evaluate the properties affected by the incorporation of phyllite and sand in ceramic bodies containing kaolinite clays, so that might be used as raw material for the roofing tiles production.
This property acts as parameter to indicate the suitability of the particle size distribution, as its influence on other fired properties [15].

For each provenance, 30 samples were selected for the performance test of mechanical properties.
In other word，Indian provenance 3071 was the best one on mechanical properties of all geographical provenances.
Relationships of Teak Properties.
Among them the positive correlation between basic density and fiber percentage were pronounced while vessel percentage was the predominant negative factor affecting the basic density.
All in all, the basic density was identified as the fundamental base of various mechanical properties of teak, determining other mechanical properties.

The force affect factors of anchor anti-slide pile in slope reinforcement under seismic load are studied in this paper.
Therefore, under the action of earthquake, for maximum shear and maximum moment, the range corresponding to S is the biggest, the range corresponding to b, h is the medium, the range corresponding to L is the minimum; S is a major factor affecting maximum internal force of pile.
Conclusion The force affect factors of anchor anti-slide pile in slope reinforcement under seismic load are studied in this paper.
Study overview of interface properties between soil and structural material [J].Hohai technology progress, 1994, 14(4):1-8
The Mechanical Properties Study of Interface between Soil and Structure [D].Master Degree Thesis of Dalian University of Technology, 2011