Search results

The fuzzy evaluation model for the affecting factors of highway construction accidents was established.
Then the weight of relative factors were determined.
Unsafe condition Unsafe condition object refers to a substance involved in the production process, the inherent insecurity of these properties and their potentially damaging ability of a substance composed.
A total of four indexes and 15 evaluation factors.
The fuzzy evaluation process is shown in Fig.2 Fuzzy evaluation factors set U The conclusion of evaluation Multi-factors comprehensive fuzzy evaluation Single factor fuzzy evaluation Evaluation set V Fig.2 Fuzzy evaluation process The basic steps of fuzzy evaluation are shown below: (1) Establish fuzzy evaluation factors set U If we want to establish the mathematical model of fuzzy evaluation, the first is to establish factors set, assume the fuzzy evaluation factors set is U.

Introduction Corrosion is one of the factors contributing to limitation of steel structures lifetime.
However, their effectiveness is affected by a number of factors encountered at the exploitation site including UV radiation, temperature variations, humidity changes etc. [1-4].
Significant deterioration in the dielectric properties occurred after 146 000 cycles.
The impact of cyclic stress may be regarded as synergistic and the most when accompanied by other degrading factors. 4.
Schweitzer: Mechanical and Corrosion-Resistant Properties of Plastics and Elastomers (Marcel Dekker Inc, New York Basel 2000) [19] R.

The choice of electrode for SMAW lies on a number of factors, like weld material, welding directions and the preferred weld properties.
Electrode diameter has important effect on weld properties.
Type of polarity depends upon, requirement of weld properties, electrode material and base material.
[12] L. leinonen, Superior properties of ultra-fine-grained steels, Acta polytechical, 44 (2004)
Perez, Mechanical properties dependency of the pearlite content of ductile irons, Journal of achievements in Materials and Manufacturing Engineering, 33(2009) 150-158

Metal matrix composite has been developed to improve mechanical properties for the automotive component application.
One crucial factor in achieving excellent mechanical properties is improving the properties of the aluminum matrix of composite by the heat treatment process.
The test results show that the mechanical properties of aluminum matrix composite tend to increase after the heat treatment process.
These two particles will further increase the hardness of the composite.(12) The percentage of Fe and Mn element does not significantly affect the mechanical properties of aluminum composite matrix.
Effect of matrix strength on the mechanical properties of Al – Zn – Mg / SiC P composites. 2000;31:1139–45.

By the formation of intermetallic compounds also mechanical properties can affect.
To find out various affects on mechanical properties tests were performed, by the results obtained conclusions are as follows 1.
Microtopography and mechanical properties of vaccum hot pressing Al/B4C composites.
Study on Mechanical Properties of Al 7075 Hybrid Metal Matrix Composites.
Experimental Investigation on Mechanical and Wear Properties of Al7075-B4C-TiO2 Composite.

This variation in cationic distribution manifests in notable changes in the synthesized ferrite's magnetic, mechanical, and degradation properties.
The mechanical properties of the resultant systems were evaluated based on IR studies.
Given the non-linear relationship observed, a complex interplay of factors may be at work.
Elastic Properties.
Interestingly, the pH of the reaction medium had a significant impact on the magnetic microstructure and the distribution of magnetic and nonmagnetic cations along the spinel sublattices, thereby affecting the magnetic properties of the synthesized systems.

The key factor affecting erosive wear performance of ceramics is their microstructure.
Table 1 Mechanical properties and erosive wear rate of all test samples.
Results and Analyses Mechanical properties and erosive wear rate.
The results show that the Al2O3 content is not the main factor affecting wear resistance of alumina ceramics.
The key factor affecting erosive wear performance of ceramics is their microstructure.

The Effect of Traveling and Rotation Speeds on Mechanical Properties During Friction Stir Welding of Dissimilar Al Alloys Jae-Cheul Park1, a and Seong-Jong Kim2, b 1, 2Division of marine system engineering, Mokpo Maritime University Mokpo City, Jeonnam, 530-729, South Korea a romagain@mmu.ac.kr, b ksj@mmu.ac.kr Keywords: Friction stir welding(FSW), Dissimilar Al alloy, Traveling speed, Rotating speed, Mechanical property, Optimum FSW condition Abstract.
The strength and corrosion characteristics in FSW are influenced by external factors in the welding environment.
Tensile tests were conducted using Series IX software (Instron) and a servohydraulic testing machine (model 8516, Instron) to evaluate variations in the mechanical properties of the welded specimens for the range of parameters.
The microstructural properties were evaluated by hardness measurements and observations of the cross-sections.
As mentioned above, a traveling speed of 61 mm/min produced results with excellent mechanical properties.

Factors affecting nano-particle size and particle saturation magnetization were investigated using five factors and three level orthogonal experimental design.
At present, coprecipitation is one of the mostly used methods to prepare Fe3O4 nano-magnetic fluid and there are multiple factors that can affect the properties of nano-magnetic fluid in coprecipitation.
In order to improve the application of nano-magnetic fluid for seal, this paper studied the factors that affect the properties of nano-magnetic fluid and selected the coating surfactant.
Considering the multiple factors during the preparation process and the interaction among these factors, five main factors, which affect nano-particle size and particle saturation magnetization, were investigated.
In table 3, K1~K3 is the sum of three level factors (precipitation ratio), k1~k3 is the mean value of three level factors, and D is the factor range.

The lower strength of prototype parts mightl seriously affect the quality.
In this study, author used the coated sand casting as the material of selective laser sintering experiment, studied the processing temperature and time on the mechanical properties of post-processing, and the influence on gas-forming property and collapsibility of the pieces.
And combined with casting experimental to analyze the accuracy influence factors of precoated sand sintering parts and other performance assessment.
In this paper, use the coated sand casting as the material of selective laser sintering experiment, studied the processing temperature and time on the mechanical properties of post-processing, and the influence on gas-forming property and collapsibility of the pieces.
And combined with casting experimental to analyze the accuracy influence factors of precoated sand sintering parts and other performance assessment.