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Both material properties and geometric parameters were optimized.
The value of these properties was not in the catalogue, and the properties used to perform the material selection were related to a material sub-class, Eg.
The mechanical tests performed were: Tensile Test and Extensometry Test, to obtain the relevant material properties, mainly Young Modulus, Poisson Coefficient and Yield Stress.
To achieve the aim of deflection reduction, one must optimize both geometric parameters and material properties, focusing two main factors: The Young Modulus and the Inertia Moment, with the goal of maximizing the rigidity and minimizing the object mass.
In both models one considered three geometric variables and three material properties variables.

In many cases the acoustic properties of space of sound propagation have great importance.
In such cases, the sound levels depends on the distance from the acoustic source and will be affected by the shape of the area and position of absorbent surfaces, scattering of sound on machines and other equipment.
Summary In determining the expected sound levels in a confined space, it is necessary to know: - noise level of technology equipment; - position of assessed point relative to the position of source; - dimensions and cross-sectional areas of scattering bodies and their acoustic energy absorption coefficient; - shape of space and absorption of flanking areas; - other factors affecting the propagation of sound energy, such as temperature, humidity, etc.
Zajac at. el.: Reduce noise and vibration in mechanical facilities (in Slovak), Alfa 1990, ISBN 80-05-00674-8 [2] H.

Fig.3 shows that the temperature of same position in the radial direction of roller sleeve is not the same, which attributed to uneven heating of roller sleeve in the furnace and other factors.
Fig.1 The assembly diagram of grinding roller Fig.2 Temperature test point 1—grinding roller 2—roller sleeve 3—ground 4—interference fit surface 5—shaft shoulder 3 Finite Element Model Creating the finite element model (1/24) of the grinding roller according to the symmetry in order to reduce the scale of calculation and ignoring the influence of random factors, which ignores the part of far away from the thermal assembly and the lifting screw hole.
The material properties are obtained by the Mechanical Design Handbook (Table.1).
Table.1 Material properties Properties Material Elastic modulus (Pa) Poisson's ratio Density (kg/m3) Linear expansion () Friction coefficient Thermal conductivity (W∙m-1∙k-1) Specific heat capacity (J∙kg-1∙k-1) 34CrMoNiV 2.1×1011 0.286 7.9×103 12.5×10-6 0.15 44 460 35 2.0×1011 0.3 7.8×103 11.8×10-6 0.15 48 450 4 Define boundary conditions The way of heat transfer between the inner surface of the roller sleeve and outer surface of the shaft is thermal conduction, as thermal convection and thermal radiation between the grinding roller and air.
While the main factor affects the contact thermal conductivity is the interfacial contact pressure.

., Yeshwantrao Chavan College of Engineering, Nagpur, India a. . ajayldandge@gmail.com, b meshramvg@gmail.com Keywords: Phosphogypsum (PG), admixture, cement, concrete Abstract: Modern concrete is now common to use admixture (chemical or mineral), pozzolana’s for modifying different properties of concrete in fresh and hardened state.
This paper presents the salient features of the development of Phosphogypsum(PG) Cement Concrete and discuss the improvements affected in the properties of concrete with the use of PG as an admixture compared to the plain or conventional cement concrete.
Study were conducted for modifying the properties of the concrete, controlling the concrete production cost, to overcome the scarcity of cement, and finally the advantageous disposal of industrial wastes.
A) Chemical Composition of phosphogypsum B) Physical properties of Phosphogypsum Chemical Constituents Percentage Cao 31.16 SiO2 3.91 SO3 42.3 R2O3 3.6 Mg 0.49 H2O 10.09 Loss on ignition 19.8 Property Value Fineness 3250 Sq.cm/gm PH 2.5 Free moisture 19-35% Sp.
Erdem, The effect of phosphogypsum on the setting and mechanical properties of Portland cement and trass cement, Cem.Concr.

Polyethylene owes its popularity to an advantageous combination of properties, such as good biocompatibility, high mechanical strength and a low friction coefficient.
Changes in the structure of the polymer induced by irradiation cause a significant modification of its physicochemical properties, which, in consequence, affects its behaviour during operation.
In the case of polyethylene implants, post-radiation processes involving oxygen lead to the degradation of the structure and to changes of mechanical properties of the material [5-8].
Therefore, it is necessary to select the shaping factors in a way that reduces the influence of oxygen as much as possible.
Edidin, Degradation of mechanical properties of UHMWPE acetabular liners following long-term implantation.

These are detrimental to the resultant mechanical properties.
In this work, we have explored the effect of laser point distance on density and mechanical properties of a low-modulus titanium alloy.
The as-produced samples had comparable mechanical properties to those prepared by conventional processing routes.
For a given material, the laser energy density, E, is a key factor that affects the quality of parts fabricated by selective laser melting.
Levy, Influence of the particle size distribution on surface quality and mechanical properties in AM steel parts, Rapid Prototyping J. 17 (2011) 195-202

These years the principle of elastic dynamic is used to determine the various mechanical properties of materials and interior damage of material appearing in previous period.
The unreversed micro-transformation including micro-flaw extending, space-growing will appear when the structure and organize suffer from exterior load or circumstance factors,which will cause the degradation of the material macroscopical mechanical character’s inferiority-damage.
The bearing ability of structure is affected obviously by the damage.
If the damage cause the material character’s difference between the different segments of the structure,it should be dealed with by subarea according to the various material property.
The damage location a’s effect on the (a)wave amplitude affected curve (b)wave propagation time affected curve The damage region location ‘s effect on the wave propagation is complex comparatively.

Zhu The School of Mechanical Engineering of Dalian Jiaotong University, Dalian,China 116028 The School of Mechanical Engineering of Dalian Jiaotong University, Dalian,China 116028 wwwjun-dlut@163.com, zhujingt@djtu.edu.cn Keywords: Abrasive Waterjet Engineering Ceramic Technical Parameter Machining Quality Abstract.
They are energy parameters ( water pressure, water nozzle diameter, abrasive flow rate, nozzle traverse speed ); material parameters ( cutting material properties, abrasive particle size and hardness ); shape parameters ( abrasive jet nozzle diameter, target distance ), [3].
The abrasive nozzle diameter does not affect the material removal volume.
Conclusion For each kind of processing method, we should consider not only the processing efficiency of it, but also consider it the processed surface quality, both factors of economy, practicality and so.
Chinese Journal of Mechanical Engineering. 2002, 15:73一78.

After the preliminary thermo-mechanical treatment, the steel was subjected to cold rolling up to 85% of reduction and subsequent annealing in the temperature range 650÷950°C for various times.
Significant structural changes were observed in the course of annealing treatment affecting the formation of the ferrite and austenite texture.
Introduction Duplex stainless steels represented an important and expanding class of stainless steels with an attractive combination of mechanical properties and corrosion resistance.
From the point of view of the most important properties of these steels, the precipitation processes of inter-metallic phases are very important [1÷4].
The value of the PREN (Pitting Resistance Equivalent Number) factor was estimated within the range of 35÷38.

Structure Optimization of Variable Pitch Helix End Mills Based on FEM Simulation Panling Huang1,2,a, Jianfeng Li1,2,b and Jie Sun1,2,c 1 School of Mechanical Engineering, Shandong University, 250061, China 2 Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education, 250061, China a hfpl@sdu.edu.cn, bljf@sdu.edu.cn, csunjie@sdu.edu.cn Keywords: Variable pitch; helix end mills; FEM simulation; structure optimization; ABAQUS Abstract.
Chatter is one of the main factors that affects the manufacturing quality and limits the productivity during milling.
Material Property of Mills.