Search results

It is important to remember properties of the individual components of a structural element and subsequent interaction during a fire.
Fig.2 Dependences of charring Reaction to fire classification and other no standardized material properties Element of building construction type D2 has every combustible components and product hidden under non-combustible cover and so this element doesn´t increase intensity of fire.
If would be used glued joints with having properly selected properties.
When filled with combustible material it can lose it is properties before the time the covering is destroyed.
Summary There are many factors affecting preterm failure of timber frame constructions.

Obtained results indicate significant differences in surface layer properties for both investigated machining variants.
There are few factors which affect the EDM process such as current intensity, voltage, pulse on and off time, dielectric type, material of working electrode and EDM generator type.
Further analysis of heat affected zone properties is necessary, especially to explain the differences in the amount and thickness of solidified material on the machined surface.
It leads to changes of composition in the surface layer and affects physical and chemical properties of material.
Therefore, further research should especially focus on these aspects of proposed modification of dry-EDM process and its influence on the heat affected zone properties in details.

.%) on the microstructure and mechanical properties of Nb-12Si-22Ti alloys were studied.
The relationship between the microstructure and the mechanical properties was discussed.
Microstructure and phase structure of alloys are the important factors to affect the room temperature ductility of Nb-Si system alloys.
In this work, we try to improve the microstructure and the mechanical properties of Nb-Si alloys by modification treatment.
Fig. 3 compared the mechanical properties of these alloys.

Study on the Wear Properties of Hydrodynamic Oil Film Bearing by Finite Element Method Yugui Lia, Lin Zhu, Jianmei Wang, Hailian Gui, Duo Yan and Qingxue Huang Material Science & Engineering Science College, Taiyuan University of Science and Technology, Taiyuan 030024, P.
Most of the domestic and foreign scholars have been using Reynolds equation to study the dynamic characteristics of sliding bearings [4], and Reynolds equation was simplified as N-S equations, which neglected the inertia, film curvature and some other factors.
Many factors affect the distribution of pressure such as the errors of rolling piece, the tension change among the frame, rolling speed, roller and taper sleeve and other major errors of manufacture and installation.
All the above results are associated with practical production, and then the fatigue properties of bearing, the initiation and expansion of fatigue crack are explored.
Cao: Sliding Bearing (The Mechanical Industry Press.

Duration of carbon dioxide treatment affects both the early and long-term properties of wood-cement composites, however, there are few previous studies of carbonation of paper sludge-steel slag composites.
To optimize the carbonation process, some factors were considered as listed in Table 3.
Table 5: Physical-mechanical properties of paper sludge-steel slag composites No.
The mechanical properties of the composites were negatively affected by the paper sludge amount, but when the percentage contents of paper sludge were below than 20%, experimental values of mass gain of carbonation were slightly higher than theoretical values.
The effects of composition and carbon dioxide injection time on the properties of wood-cement composites.

The two or more layers of the films were extruded together for improved properties such as UV-absorption, oxygen barrier properties and texture.
However, starch alone is not able to form films with satisfying mechanical properties.
Therefore, plasticizers are impregnated in starch to pretreat the starch and improve its poor mechanical properties and thermoplastic behaviour.
Mechanical Properties.
In addition, another important factor that could affect the mechanical properties of the films is the physiochemical state which includes the degree of crystalline of the polymer matrix.

Introduction In many mechanical engineering problems, especially when they are cracked mechanical components, there are stress concentrations in the area near the crack tip, the concentrations are described through the stress intensity factor.
The hard coatings obtained by atom diffusion of boron is an alternative to increase the surface mechanical properties.
In this study the mechanical properties of hard coating Fe2B [4] were (Young’s modulus E = 290 GPa, Poisson’s ratio, ν = 0.2, yield strength =5 GPa) and Gray cast [5] (Young’s modulus E =113 GPa, Poisson’s ratio, ν = 0.3, yield strength = 325 MPa).
Thus, good reliability of the mechanical properties with hard layers is obtained and is valid for use in applications.
[5] ASM International Handbook Committee, Properties and Selection: Irons, Steels, and High-Performance Alloys in 1990, Volume 1 of the 10th Edition Metals Handbook

We can use these entire data to make a Response Table, then to proceed all factors effects analysis.
If some factor’s main effects value is larger, its influence to the system is larger than other factors.
In addition, as learned from main effect analysis from Table 2 spinneret temperature and gear sped are prominent factors that affect the tenacity.
Kung, Experimental analysis and optimization of the synthesizing property of nitrogen-modified TiO2 visible-light photocatalysts, J.
Su, Study on an optimal design of mechanical properties for PP/PET nonwovens, Fibres Text.

Lubrication is one of the important factors for a journal bearing to function well.
The dimension affects other properties such as radial clearance which is highly crucial in analysis of bearing [25].
Properties such as diameter of journal, the length of bearing and radial clearance is the most crucial factor in designing the bearing.
The result obtained may be different from other studies as there are many factors involved.
Factors like the software used in one of the major factors that may differ the result.

Introduction Time correlation characteristics of material mechanics performance is very important for the structure design, especially the long-term mechanical properties of accurate information is the basis of analyze the structural strength and life [1].
In the course of service of the building silicone sealant, stress relaxation (physical aging) also lead to its mechanical properties change, at a certain temperature and under long-term loading will exhibit its own creep characteristics.
Therefore, considering the time correlation performance of the building silicone sealant is very important, and fully grasp the mechanical structure adhesive properties of the time evolution, especially the evolutional law of mechanical properties changes with time and nonlinear viscoelastic and long-term mechanical properties of the building silicone sealant.
Therefore, load(stress) level is an important external factors influencing structural adhesive creep behavior, control load level is one of the important ways to prevent long-term creep failure for building silicone sealant.
Advances in studies on accelerated characterization of long-term mechanical properties of rheological materials, Materials Review, Vol. 21(2007),P. 8-10