Search results

It is evident that heat developed during the machining operations affects the cutting tool’s performance and surface integrity of machined components as well.
Experiment Setup For this experimental work, AISI D3 tool steel work material of diameter 55 mm and length 220 mm that having the chemical composition as shown in Table 1 was selected because of its wide applications and possessing better technical properties.
By using these process controls factors, it was intended to measure the tool-chip interface temperature as shown in Table 3.
Each experiment was conducted thrice and their average values are tabulated in Table 4 so as to improve the accuracy of experimental data that facilities to arrive at an important decisions over machining process and control factors.
Conclusion Through this hard turning experimental investigation of AISI D3 tool steel in dry condition, the following inferences have been arrived within the range of process control factors employed: 1.

If this happens in the high pressure liquid-filled pipe system, the work state of the actuator would be badly affected [1].
And the velocity field, the pressure field and the pressure dissipation distribution were obtained to analysis the factors which influence the vibration of pipe in the valve port.
Assuming that the fluid which with constant property was incompressible Newtonian fluid was full developed.
And this was also the factor that leads to vibrations.
Chinese Journal of Mechanical Engineering. 8, 38(2002) 27-30

Using structural vibrations to extract damage sensitive features, problems can arise due to variations of the dynamical properties with changing environmental and operational conditions (EOC).
In this context a long time monitoring of the dynamical properties has to be accompanied by proper approaches to compensate the operational and environmental effects on the extracted features.
It will be also very interesting to apply the mentioned classification technique on different damage features e.g. modal parameters, statistical properties of signals, model or regression coefficients, etc.Fig. 6: Damage detection without (left) and with EOC compensation (right) References [1] H.
Mechanical Systems and Signal Processing, 22:34--56, 2008
Mechanical Systems and Processing, 19:865--880, 2005

It is worthy to note that, principal tribological parameters that control the friction and wear performance of these particle reinforced composites greatly depend on various factors such as nature, shape, size, hardness , volume fraction and distribution of particles, properties of matrix alloy, and bonding between matrix and particles [27, 28].
This improvement in mechanical properties as well as the microstructure was attributed by silica sand nanoparticles diffused in the porous sites of composites.
type of filler and its sliding partner is a significant factor in determining good tribological properties.
Recommended volume concentration of 10-20 percent for optimum results in mechanical properties as well as tribological properties.
Li, “Mechanical, electrochemical and tribological properties of nano-crystalline surface of 304 stainless steel”, Journal of Wear, 255 (2003) 836-845 [31] International Powder Metallurgy Directory, http://www.ipmd.net.

Because of multilayer material physical properties mismatch, oxidation, interface roughness, creep stress and so on, the coatings system is easy to produce cracks, expand and link near the interface of coating during thermal cycling.
The properties of the materials are temperature dependent as listed in literature [5] .
In this paper, mainly consider the crack tip stress field of complex thermal cycle load, heat transfer and the shape factor.
When model is containing crack, residual stress of the crack tip affected by the temperature is also low.
It is less affected TBC layer.

The physical and mechanical properties of field test area’s foundation soil is illustrated in Tab.1.
Tab.1 The physical and mechanical properties of field test area’s foundation soil NO.
(a) foundation and flashboard (b) cucurbit wave Fig.1 Geometric model 1.3 Analysis computational results In order to reveal the affecting mechanism of the channel goaf disaster, a comparative analysis of the unfavorable foundation and natural foundation performance by numerical simulation with FLAC3D.
(1) When fill the wave with high strength material (C15 concrete), due to the big difference in property between the filling material and surrounding soils, with the upper load transfering to the composite foundation, it can be uniform settlement.
“Studying on Influencing Factors of Ground Settlement over Mined-Out Area”[J].

As the important part of mechanical devices and skeletons, mechanism affects the dynamics and kinematics performance of the entire plant, it determines the basic properties of product, is the fine performance of mechanical systems with lies.
Therefore, in the field of mechanical creative design, The first is by creative design of mechanism.
The topological structure of mechanism refers to the sports properties of mechanism, freedom, link assortment and Join relationships between them, which is on the premise of not involving scantlings exported, although is not equivalent to the actual characteristics of the body, but it represents the inherent properties of kinematic chains, is an extremely important factor in decision mechanism characteristic.
This method allows the designer to him, by analogy to ensure predictability and rationality of product design, also laid the foundation for further invention and createnew type mechanical device.
Yao Yan an,wang yu xin, Guo Ke qian translation. creative design of mechanical device [m].

Introduction The major failure modes of metal material such as fatigue, corrosion and abrasion began at the surface of metal material, so the structure and properties of the metal material surface directly affect the comprehensive performance of materials.
The shock wave generated modifies the surface microstructure, surface morphology and properties of metallic targets such as hardness, fatigue and corrosion resistance.
The increased compressive residual stress depth produced by laser peening can significantly improve properties and control the development and growth of surface cracks.
Research Status of Laser Shock Processing Research Status of Laser Shock Processing Abroad.For the first time the microstructure of aluminum alloy 7075 was modified to improve its mechanical properties with high power laser pulse of shock wave at Battelle Columbus Laboratories in 1972.
Moreover, laser shock processing has been shown to harden the surface and improve the mechanical properties of some structural metal components.

Unlike most material properties, machinability cannot be simplified into a unique work material property, but the resultant property of the machining system which is mainly affected by work material’s physical properties, heat treatment, and work-hardening behaviour, as well as other machining conditions, Hongyu Zheng and Kui Liu, [1].
They observed that the machinability index and mechanical properties of the materials play an important role in establishing the milling time and surface roughness.
They also correlated the surface roughness with the mechanical properties of the material and the specific machining energy for AWJM.
The use of carbon fibre-reinforced composites is increasing today since they have an excellent weight-to-mechanical properties ratio.
Mechanical properties of tested materials.

Most attention has been paid to improving the manufacturing process and physical and mechanical properties of bamboo scrimber and less on the machining properties.
Fujiwaar et al. [11] considered the relationship between roughness parameters and tactile roughness of the wood surface, which are factors assessed by consumers.
Lavery et al. researched the parameters affecting the finished surface of planed Sitka spruce [14].
There was no consistency between the feed speed and cutting depth affecting the surface properties.
Parmeters affecting the surface finish of planed Stika spruce.