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The different process conditions also make the coating effect and the electrical properties of the composites different.
Doping of protonic acid was an important factor affecting the conductivity, different concentrations of aniline to provide the acidic environment was different.
Conclusions The process conditions of PANI coated nickel fibers and electrical properties of coated nickel fibers were investigated.
Shi, and Q.Guo, Preparation and Electrical Properties of Graphene Coated Glass Fiber Composites.
Yang, Preparation and Electromagnetic Properties of PANI Coated Short Carbon Fibers.

A significant objective in secondary Al manufacturing is to achieve enhanced sustainability through combined mechanical and thermal processing for improved properties giving reduced mass and longer life along with decreased processing steps, energy consumption and pollution.
TMP always involves a mechanical shaping operation that must successfully create the shape and impart a structure leading to the specified mechanical properties.
DMB develop directional properties (texture) that depend on the method of mechanical shaping, being little affected by T in deformation.
Almost every process combination has instances of marked improvement of selected properties; however, it is not necessarily applicable to other alloys.
Sellars, Al Alloys, Physical Mechanical Properties, ICAA3, L.

From the study, it was found that the addition of microwave absorber had significant effects on the yields and properties of the final products.
The value for all three parameters has only a slightly different and shows for acidic properties of bio oil.
Some factors might affect the chemical composition of bio-oil such as biomass feedstock type, pyrolysis parameters (residence time, pressure, temperature, gaseous environment heating rate), pre-treatment process, and also condensation and vapour filtration (condensing method and medium, filter type, cooling rate).
As a result, the fuel properties of different bio-oils usually vary in wide ranges.
Generally, pH analysis has shown for acidic properties of bio oil produced.

Various factors should be considered to obtain a proper design of the bike, especially on the frame, because it is an essential part of bicycles.
Material properties that used for analyze also varying they are AZ61 [24], Al6061 [24,27], steel [25], composite laminate [28].
Material properties of aluminum 6061 [29].
Properties Metric Unit Modulus Young (E) 68.9 GPa Poison’s ratio (n) 0.30 - Density 2.700 kg/m3 Yield Stress 276 MPa Bike manufactured.
This vertical loading condition represented by twice the weight of the driver due to the G factor.

Plates of 08AL and 2024-O were selected, with mechanical properties showed in Table 1.
Polyurethane (Tab. 1) was chosen as the elastic cushion and with its mechanical property simplified to a linear elastic model.
Table 1 Main mechanical properties of materials.
Springback is almost unavoidable in sheet metal forming and is the main factor in reducing the forming precision.
And it is directly affected by the stress concentration and nonuniform internal stress distribution.

Therefore, to determine the durability of the rubber polymer (rubber polymeric concrete), taking into account the temperature factor is a very up to date problem.
(3) where: s, Т, t - strength, MPa; temperature, 0К; time to destruction, sec, respectively; R – universal gas constant; - force, structural and mechanical factors; U0 -energy of activation of destruction; Tm - limiting temperature; tm – minimum durability at any tension or without it.
The change in the material constants , and is significantly affected by the introduction of the composite plasticizers, antioxidants, manufacturing method and structure of the composite structure.
Shutilin, Handbook of elastomer properties, Voronezh State Technological Academy publisher, Voronezh, 2003

Mihai Viteazul nr. 24, Timisoara, Romania abogdan.radu@upt.ro, bviorel.ungureanu@upt.ro, cioan.both@upt.ro, dmircea.burca@upt.ro, ebenzarstefan@yahoo.com, fdan.dubina@upt.ro Keywords: resistance spot welding technology, galvanized steels, microstructures, optic microscopy, mechanical elongation tests.
Resistance spot welding technologies were developed and tested, together with mechanical testing of the welded joints, which were performed in our laboratories.
Introduction In the last years, structures designers focused their work on developing new techniques, which allows an economy of materials and working time, which will also guarantee a safe exploitation, the structure respecting all standard prescriptions and safety factors.
Because one of the very important properties for the life expectancy, of the metallic structures which are placed in atmospheric environment, is the resistance to corrosion and this property is highly dependent to the thickness of the Zn protecting layer, our experimental program also measured this parameter.
The curve force-displacement (fig. 3.b) for the samples welded with the welding parameters presented in table 2, revealed good ductility (toughness of the material in the nugget and also in the Heat Affected Zone – ZIT, with no brittle behavior) and very good capacity to support loads.

Although the PET is a plastic that does not have high sufficient mechanical properties to apply it in construction, it could be mixed or chemically modified by the addition of a ceramic material as the clay, sand or gravel.
Polymer concrete properties could be modified according to the applications to vary not only mineral but also the characteristics of the bonding polymer fills application.
This behavior indicated that material did not suffer a great thermal degradation, so the molecular structure of polymer was not affected, being the dispersion of clay in the polymer the main factor that influenced the increase of the hardness of the material [5].

A series of parameters such as power factor, active power and reactive power which change with the voltage and frequency are chosen to demonstrate the load components characteristics in load modeling. [1]Load model is the mathematical expression of the depicted bus power varying with the bus voltage and bus frequency.
As a vital composition in power system, load model is tough to build accurately due to its complexity, distribution, variation and stochastic properties.
(1) (2) Rotor motion equation, electromagnetic torque equation and mechanical torque equation are expressed as (3), (4) and (5) respectively
In order to describe load time-varying property, a parameter is defined as (8), which is to define the initial active power proportion of the equivalent motor in the composite load model
The Synthesis load model structure taking account of the distribution network solves the problem that network impedance affecting the load model accuracy.

The Acoustic Emission (AE) monitoring technique is widely used in mechanical and material research for detection of plastic deformation, fracture initiation and crack growth.
It is shown that the strain rate and the presence of a crack (modeled by a notch on the sample), affect the fracture mode (brittle or ductile) and a relative amount of the mode dependent AE signatures.
Some authors studied the relationship between AE features (such as signal amplitude, frequency, energy and duration) and mechanical parameters (load, stress and crack growth) during tensile deformation of notched or plain specimens [8-11].
AE sources Factors AE waveform parameters Ref Amplitude Frequency Duration Rise time Count Waveform Fracture modes Ductile fracture Low Low Long Low Low Continuous signal [3] Brittle fracture High High Short High High Burst signal Material behavior Plastic deformation Low low long Low - Continuous signal [8] Crack initiation and propagation High High Short High - Burst signal [3] [10] Crack type Tensile mode-I High High Short high Longitudinal [1] Shear mode-II Low low long low Shear wave Strain rate effect High Strain rate High - - - - - [8] [11] Low strain rate Low - - - - - Experimental procedure Fig. 1 The geometry of single edge notched specimen Tensile testing.
The GTN constitutive model can describe the influence of voids on the plasticity properties of a metal and can be incorporated in the finite element analysis to simulate the tensile behavior of an aluminum alloy specimen [14].