Search results

Modelling boundary conditions for both thermal and stress analyses, was identified as a key factor affecting predictions of residual stresses and distortion.
Introduction Welding -induced residual stresses and distortions have been well recognised as vital factors affecting the performance of welded structures in many applications, especially in low-stress failures.
Song et al.[10] studied the effect of thermal material properties on the temperature history results and the mechanical material properties on the resulting von Mises stress.
The temperature history was seen to be influenced by thermal properties and stress by mechanical properties, however, the effect of thermal property variation on the final residual stress results was not examined.
Variation of thermal and mechanical properties with temperature is obtained and studied as a result of an extensive literature search.

Soil is the basis of grassland ecosystem, and the changes of its properties directly affect grassland ecosystem.
Soil physical and chemical properties were analyzed in each test area.
Grazing first change soil compactness, and then cause other physical and chemical properties change[5].
Analysis method The study is mainly according to the physical properties and chemical properties.
For soil physical properties, this paper mainly compared the changes of soil moisture content and mechanical composition in experimental zone.

Analysis of lubrication conditions and mechanical properties of drawn wires In the high speed multi-stage drawing process the main physical parameters, which have significant impact on the wire surface layer, and thus the properties of drawn wire, are friction, heat deformation and thermal lubricant resistance and its rheological properties.
In Figure 4 the amount of lubricant on the wire surface and in Table 2 mechanical properties for f1.7 mm wires drawn in hydrodynamic dies were presented.
Mechanical investigations confirmed that too high increase of the pressure in the hydrodynamic die at high speeds of 25 m/s, resulted in further deformation of the wire and an increase in its strength properties, the deterioration of plastic properties and a decrease in the number of twists.
Thus, at the same final wire diameter of 1.7 mm and very good lubrication conditions the increase of the drawing speed of 5 to 20 m/s did not affect significantly the mechanical properties of the wires.
In high speed wire drawing process the most important factors influencing the roughness parameters are layers of lubricant, ie. pressure.

The defected structures have led to the poor mechanical properties and this cannot be tolerated.
This can affect negatively the mechanical properties of the composites.
Dynamic Mechanical properties of WPCs were measured by a Perkin Elmer DMA 8000.
Wood also can affect the product properties as the bulk density material [1].
Degradation of the fibers during processing may have a detrimental effect upon the mechanical properties of the composites.

The results highlight that the billet temperature and percentage deformation are critical factors affecting die wear.
Introduction Metal forging is one of the conventional manufacturing processes that produce products with exceptional mechanical properties while minimizing or eliminating material waste.
The billet material is AISI 1035 steel, and AISI H13 tool steel is used for the dies, with their properties detailed in Table 1.
Properties of billet and die material.
Analysis of variance (ANOVA) was applied to identify significant parameters, with billet temperature and percentage reduction identified as the most influential factors affecting the response.

The mechanical properties were characterized using tensile, hardness, and wear testing, where as the microstructural observation was performed using an optical microscope.
It has been shown that SiC particles will increase the mechanical properties of the composite including the strength, ductility, hardness, and fatigue strength [3].
In this case, strengthening particle such as SiC can increase mechanical properties of aluminum such as tensile strength, compressive strength and hardness [13].
The cause of this decrease could be due many factors such as inadequate particle distribution, porosity, or microstructure that triggers agglomeration.
Hmida, "Silicon Carbide: Synthesis and Properties," in Properties and Application of Silicon Carbide, Rijeka, InTech Europe, 2011, pp. 361-390

Although this alloy is difficult to cast, it has a particularly high response to age-hardening and therefore offers mechanical properties close to the wrought 2014 alloy.
In A201, trace additions of Ag promote greater response to age hardening (Table 1 shows its composition and typical mechanical properties) [17,18].
Mechanical properties of thixoformed A201 alloy using different die materials and different feedstock production routes as compared to 2014 wrought alloy.
The use of ceramic inserts had a beneficial effect on the mechanical properties as can be seen from Figure 5.
Nevertheless, if semi-solid processing of alloys or thixoforming is to ever make any inroads into full commercialization and more importantly find applications in the higher end of the market industries such as aerospace two factors are of great importance: 1) the creation of a data base with a wealth of consistent, repeatable properties, independently obtained and 2) clarity on the costs of the process which will of course directly affect the size of any potential market.

Analysis and Comparison on Mechanical Properties between Full-Graded and Wet-Screened Concretes Shi Hua Zhou 1,2,a, Hua Quan Yang 1,2,b and Yun Dong 1,2,c 1Changjiang River Scientific Research Institute, Hubei China 2Center on Water Engineering Safety and Disaster Prevention of the Ministry of Water Resources, Hubei China azhoush@mail.crsri.cn, byanghq@mail.crsri.cn, cDongyun@mail.crsri.cn Key Words: Full-Graded Concrete; Wet-Screened Concrete; Mechanical Properties Abstract: Based on typical hydraulic engineering, difference of performances between full-graded and wet-screened concrete was studied.
This directly affects physical and mechanical properties, deformation performances and durability of concrete, which together with the size effect of specimen and the gradation effect of aggregates, cause the discrepancy between experimental results and actual full-graded dam concrete [2-3].
Based on several typical hydraulic engineering, this paper investigates mechanical properties of full-graded mass concrete, analyzes the difference of properties between full-graded concrete and wet-screened concrete, providing the technical support for the design and construction of mass concrete.
Moreover, compared with full-graded concrete, wet-screened concrete has larger quantity of cementitious materials that is the main factor to affect tensile strength of concrete, leading to a higher splitting tensile strength.
Experimental Study on Full-graded Concrete Properties with Phosphorus Slag Power [J].Journal of Yangtze River Scientific Research Institute, No.3, Vol. 26(2009), p:53-56.

There are so many factors affecting on vibration of vehicles, in that body structure is one of the main causes.
There are many factors that affect the vibration noise of cars, in which the structure of the body is one of the main causes.
The body of the car is mainly low carbon steel, because the low carbon steel properties are not much different, so the influence on the calculation results can be ignored.
The material properties are ​​used to build the finite element model are shown in Table 3.
Table 3 Properties of material in the model Parameter Elastic modulus Poisson coefficient Specific weight Value 2.06e5 [Mpa] 0.3 7.89e3 [kg/m3] Theoretical basis for solving individual oscillation problem The linear oscillation of a mechanical system is described by a sufficiently wide n-coordinate system (n degree of freedom).

An experimental study of the physical and mechanical properties of untreated and acetylated wood was conducted.
Moisture and temperature are one of the most important factors that lead to the accelerated destruction of wood.
To extend the life of wooden structures, they need protection from adverse factors.
The modification makes it possible to increase the operational parameters of wood by affecting its water resistance, resistance to high and low temperatures, resistance to biological factors and mechanical loads.
Thus, the effect of acetylation on the improvement of some physical and mechanical properties of wood has been established.