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Noise can be source of risk of workplace accidents, work-related stress and combined with other risk factors at the work place can damage health in both the long and short term.
Alain Finkielkraut Noise in one of the physical environmental factors affecting our health in today’s world.
Noise in generally defined as the unpleasant sounds which disturb the human being physically and physiologically and cause environmental pollution by destroying environmental properties [10].
- Work-related stress: Work-related stress rarely has a single cause, and usually arises from an interaction of several risk factors.
Work-related stress (in which noise may be a factor) can compound this problem [7].

It is insufficient only to carry out mechanical property of rod-shaped samples.
The decrease in workability adversely affects the overall component cost and the ability to achieve the desired properties.
Because the developments of P/M superalloy are followed as the utilization of turbine engine disc, the related studies are investigated in terms of low cycle fatigue, fatigue crack propagation, thermo-mechanical fatigue, creep strength, burst and tensile properties [1-8], but few papers were published discussing the high cycle fatigue of P/M superalloy.
The effects of surface factors would decrease at high stress state.
Besides peening effect, there are not other main influence factors on initiation site.

These oils are not only affecting the process but also effecting the mechanical properties of the vulcanizate.
Table 1 The effects of incorporation of oil on increasing aromaticity on rheological and mechanical properties [4].
Hardness properties.
Rebound Resilience Properties.
This is probably due to other significant factors such as filler interaction and bonded rubber oil structural integration.

Accordingly, in this work an overview of the main microstructural factors that impact the mechanical properties, as well as the effect of interstitials such as carbon and nitrogen.
In addition the role alloy pre-straining and heat treating on the amount of e-martensite and on the exhibited mechanical properties is described.
Mechanical Properties.
In addition, the alloy posses good fatigue and mechanical properties and is widely used in the design of HIP implants.
The main microstructural feature is related to the development of e-martensite and its role on the exhibited mechanical properties.

China E-mail address: Luozhang1@263.net Keywords: Normal concrete; Steel fiber reinforced concrete; Bending tensile properties; Flexural strength; Strain rate-dependent Abstract: Extensive experimental research has been done on rate-dependent properties normal concrete, but very little on the tensile properties of steel fiber reinforced concrete (SFRC).
In this article, based on a high-speed Instron servo-controlled hydraulic materials test machine is adopted to investigate the strain rate-dependent properties of bending tensile properties for SFRC.
Introduction Extensive experimental research has been done on rate-dependent properties normal concrete [1,2, 5, 6, 8], but very little on the tensile properties of steel fiber reinforced concrete (SFRC)[9].
The mechanical properties of SFRC are determined by a number of factors including the elastic modulus and strengths of constituents; the aspect ratio, volume fraction, orientation and distribution of steel fibers; and the nature of the interface of steel fiber/matrix bond.
Meanwhile, the beam bending performance is affected by many factors, such as loading, span ratio, the orientation of the specimen, loading speed and the beam sizes, and so on.

Against the background of shenyang subway shield tunnel construction, the method of numerical simulation methods are used to analyze the factors of surface subsidence caused by shield construction comprehensively, and the universal finite element program ABAQUS is used to establish mechanical model depended on comprehensive consideration the influence factors of soil warehouses pressure, seepage and groundwater.
The shield construction methods of surface subsidence are caused by many factors, and it has been discussed by many literatures [1].
On the one hand, when tunnel are excavated below the groundwater level, groundwater flows into the work face, and produce dynamic and static water pressure caused by groundwater, which change the physical and mechanical properties of rock mass, and change its stress state.
In establishing calculation model, in order to exclude the influences of other factors, assume other factors are invariable.
After consideration the influence of surface subsidence in the three kinds of factors above comprehensive, the surface settlement distribution cloud image shown in Fig. 6.

The microstructure of the WAAM UHS steel, which includes factors like grain size, grain boundaries, and phase distribution, can greatly affect fatigue performance [8].
The analyzed microstructural configuration is important factor for evaluating the overall properties of the WAAM UHS steel.
Results also show that there is no variability in material properties, such as material consistency and mechanical properties which can affect fatigue strength.
This underscores the exceptional mechanical properties of the WAAM UHS steel. 5.
Dilger, Mechanical properties of wire and arc additively manufactured high-strength steel structures.

Defects; Mechanical testing, Thermal analysis; Stress factor intensity Abstract.
Note that all drilled specimens were roughly identical from the mechanical properties viewpoint. 1.2 Drilling quality.
Grzesik et al. [27] have shown that negative Rsk values indicate surfaces with good bearing properties.
IR thermal and stress concentration factors of CM specimens were over-estimated by 15.70% and 16.30% respectively, compared to AWJM specimens.
This in turn reduced the mechanical properties of the CM specimens.

Moreover, when using this structural element, different design parameters and materials of the core can be adopted in order to obtain desired properties.
Rao [16] derived a sixth-order theory of sandwich beam based on Hamilton’s principle and provided approximate formulae for natural frequencies and loss factors of sandwich beams under various boundary conditions.
In a finite-element model inertia (M), damping (D), stiffness (K) of the model are determined by the geometry and the material properties.
Each major structure within the model has the following general mechanical properties (see table 1).
[16] Rao, D.K., “Frequency and Loss Factors of Sandwich Beams under Various Boundary Conditions”, Journal of Mechanical Engineering Science, 20(5), 271-282; 1978

In the present work, the gelation process and the resulting morphological and mechanical properties of collagen/laponite clay nanocomposite hydrogels were invastigated.
In particular, the mechanical properties of the synthetic materials based on reconstituted collagen require improvement [1].
From the above discussion, we suppose that clay particles interact with the protein at the fibril stage, possibly affecting fibril growth and arrangement in the matrix.
Mechanical Properties.
Moreover, electrostatic forces may stabilize the network, yielding better mechanical properties [20].