Search results

The aim of this study was to compare the properties of PKRC with and without SV after 200 days of natural weathering exposure.
These factors may affect the environmental durability and the long term performance of natural fiber reinforced composites.
In facts, the degradation of mechanical properties was improved with the help of surfacing veils.
[4] Nosbi, N., et al., Degradation of compressive properties of pultruded kenaf fiber reinforced composites after immersion in various solutions.
Some mechanical properties of untreated jute fabric-reinforced polyester composites.

Fig. 1 Drawing of overlapping entities (a) Geometric model (b) Mesh mode Fig. 2 Finite element models Considering the symmetry properties of the samples, the geometry model was created in ANSYS 12.0.
Material Properties.
DP1000 material properties are key factors to ensure the accuracy of spot welding simulation.
Welding temperature field determines the stress and strain fields, it also is used in metallurgy, crystallization, phase transitions ,inextricably linked, making it one of the major factors affecting DP1000 spot welding quality and productivity.
(Hefei University of Technology, China 2005) [9] "Mechanical Properties of Engineering Materials Data Handbook," The editorial board.

Several factors of sliding friction model are discussed: surface roughness, mechanical properties and contact load and areas that have strong effect on the friction force.
It has the form: 5,0 5,0 2       =      =Ψ − ∗ RKH E s s c σ πσ σ ω (3) and as can be seen it depends on surface roughness and material properties.
The index, which is equal to ( )( ) 5,0 ' RHE σ , may be regarded as a generalized surface texture parameter, combining both material and topographic properties.
The contact between solids is controlled by two material properties, the plane-stress elastic modulus, and the hardness; and three topographic properties, the surface density of the asperities, the standard deviation of their height distribution, and their mean radius.
The value of micro asperities smoothing is dependent on assembled surfaces treatment, material properties and interference fit.

The microstructure, mechanical properties and phase constituents of FSW joints were studied through mechanical test and metallographic analysis.
Introduction Copper and aluminium were widely applied in aerospace structure due to their unique performances such as high electric conductivity, heat conductivity, corrosion resistance and mechanical properties.
However, FSW on Cu-Al materials also met some challenges because their properties were much different.
Most of the researches on FSW of copper and aluminium materials in the world mainly focused on welding technology and mechanism of welding process studies such as thermal and mechanical distribution of welding zone, material flow behavior, mechanical and microstructure properties of welding joints and so on.
Now we consider (F)/ (V) as a whole factor to research that the process parameters affect the joint properties.

This research is more focused on studying the effect of latex binder on the properties of TiO2 ceramic based material.
It has been found that the properties were influenced by the addition of binder.
Fig.1: Variation of green density Fig.2: Variation of fired density Mechanical properties The effect of binder on the Vickers hardness is shown in Fig. 4.
The grain size was also reduced because of the same factor.
References [1] Matsuoka M, Nonohmic Properties of Zinc Oxide Ceramics.

For example, Cu2S, Cu5FeS4(bornite) had clarified better sliding and anti-wear properties in the dry friction test [7].
These sulfides showed better friction properties in the dry conditions [7].
In this study, the oil addition affects the friction properties.
Summary To investigate of solid lubricity in the base oil condition, synthesized sulfides were prepared and evaluated its tribological properties and surface states.
In the synthesized sulfides, bornite (Cu5FeS4) showed superior tribological properties, especially, under the extreme pressure condition.

Most mechanical and physical properties and boundary conditions are temperature related.
Most mechanical and physical properties and boundary conditions are temperature related.
The change in temperature will remarkably affect the deformation behavior, microstructure and mechanical properties of the ring.
However, the thermo-mechanical analysis takes into account the effect of temperature variation on the material properties, as discussed before.
Here, the rolls are treated as elastic dies of AISI-H-13 material whose properties are defined in Deform materials mode.

Following by a large plastic deformation and a higher temperature at the processed surface layer, there forms a non-uniform heat-mechanical coupling stress field, this field has a great impact on the original physical and mechanical properties.
Foreign scholars using finite element software, have done a lot of emulation about non-continuous chip formation process, and the simulation about the factors (tool friction, wear, chips and temperature) affecting the surface residual stress.
(5) The cutting width effect on residual stress are not similar with other factors.
The influence factors of the residual stress is complex and changeable, any factors of the machining conditions can affect the size and distribution.
The residual stress of machined surface has been affected by many factors, the mechanism is complex and the mutual coupling is a very complicated problem.

Furthermore, the relationship between the morphology of cells and mechanical properties is also not yet fully understood.
As mentioned in detail in previous work, the <001>-oriented preferential solidification and the shape of the melt pool are the key factors in the formation of CLM [13].
Tensile properties.
Liu, Microstructural evolution during annealing of a powder metallurgical TiAl–Nb composite and its effect on mechanical properties, J.
Niu, Comparison of microstructures and mechanical properties of Inconel 718 alloy processed by selective laser melting and casting, Mater.

In this research, four factors were comparatively analyzed so as to obtain the influence of them on ultimate axial tensile bearing capacity of steel-tubes.
These four factors are longitudinal reinforcement length rate, thickness, elastic modulusand circumferential reinforcement ways of CFRP sheets.
Stress/MPa Strain Strain Stress/MPa Fig. 1 Stress-strain Relationship of Steel Fig. 2 Stress-strain Relationship of CFRP Sheets Mechanical Mechanical Properties.
Table 1 and Table 2 below show material mechanical properties of steel and CFRP sheets in this paper.
Table 1 Material Mechanical Properties of Steel Yield Strength/MPa Elastic Modulus/GPa Tensile Strength/MPa Elongation/% 235 206 407.5 26 Table 2 Material Mechanical Properties of CFRP Sheets Tensile Elastic Modulus /GPa Tensile Strength /MPa Elongation/% 242 4223 1.72 Finite Element Models Table 3 shows the geometric parameters of steel tubes.