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Tool Path Generation for Top Planar Surface of Ribs in Aircraft Structural Parts Yunlong Tang1, a, Guolei Zheng1,b , Baorui Du2,c and Shulin Chen 1, d 1School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China 2Shenyang Aircraft Industry (Group) Corporation Ltd, Shenyang 110034, China afetghf@hotmail.com, bzhengguolei@buaa.edu, csacdbr@sohu.com, dcsl_buaa@139.com Keywords: Tool path; Rib; Aircraft structural part; Constrained Delaunay triangulation.
The key factor affecting the construction of the MCs set of RTF is the split of the face into several sub areas and the extraction of its guiding curve.
Skeletons are widely used to describe its global topological and geometric properties of an object.

Prajapati1 Independent Researcher, Fatehpur, Uttar Pradesh, 212664, India 1Deepak K Prajapati is presently doing his Post-Doc from the Department of Mechanical Engineering, IIT, Delhi, India Email: deepak2019iitp@gmail.com Keywords: surface topography; correlation length; asperity radius; contact pressure; real area of contact Abstract.
Introduction Friction and wear are extrinsic properties of systems which are governed by asperity interactions.
During pure sliding or rolling /sliding motion, friction changes abruptly, however, it is also true that friction and wear are significantly affected by initial surface topography.
Later on, in Sec. 3 it is demonstrated that how different correlation lengths of measured rough surfaces affect the surface topography during wear.
This happens due to dependency of real area of contact on another factor which is asperity deformation.

Main Design Parameters The main design parameters of the system are as follows: the utilization factor of the sintering machine is 1.25t/m2.h; the production capacity of single sintering machine is 60t/h; the air volume of single blower is 510000Nm3/h (there is the only blower in each cooling section) and the rate of air leakage is 35%; the amount of effective recycling flue gas is 330000Nm3/h in first section and second section respectively; the temperature of recycling flue gas is 380℃ through the first section and 250℃ through the second section; installed capacity of generators is 2×12000kW; years elapsed time is 7128h/y; annual energy output is 171072000Kw.h; the ratio of self electricity consumption is 20.7%; the selling electric quantity is 135660000Kw.h; The generating capacity of the sinter per ton is 16Kw.h; the selling electric quantity of sinter per ton is 12.68Kw.h; the flue gas is not circular.
By (1) and (2), to improve the utilization rate of the energy, i.e. to increase the energy grade Af, and to produce more electricity without affecting the main process and product quality, besides improving η by the traditional way, the sintering process must be paid attention to for the full use of chemical energy grade of the raw material, that is, to increase Br.
In the ORC cycle, those main properties of organic working medium (such as pentane) which involve low boiling point, condensing pressure close to or slightly greater than the atmospheric pressure, low temperature resistance, low rotate speed and low working pressure can be utilized so as to optimize the waste heat.
References [1] JIN Hongguang, ZHANG Guoqiang, GAO Lin, LIN Rumou: JOURNAL OF MECHANICAL ENGINEERING.

Pump group of floating raft frame vibration isolation system belongs to hang-floating valve gear the whole system is composed of hexahedral seven-vibration isolator, raft frame and equipment which including three accumulators, two hydraulic pumps, two cooling water pumps, and one centrifugal pump, one bilge pump, distilled one water pump, one dry pump, one auxiliary cooling pump, ice mechanical and one electrical motor.
Passive Vibration Isolation, New York: The American Society of Mechanical Engineers, 2003
Study on Friction and Wear Property and Lubricant Mechanism of Water Lubricated Bearing, PhD Dissertation, Chongqing University, China, 2003
[4] Mars W V，Fatemi A．Factors that affect the fatigue life of rubber:a literature survey．Rubber Chemistry and Technology.2004，77(3)：391-412

Particularly, for drilling of aluminum cast alloy, since the aluminum cast alloys have many unfavorable properties for dry cutting including high-thermal conductivity, high-thermal expansion and low-melting point, dry drilling of aluminum cast alloys without any cutting fluids is considered as a great difficult theme [8].
The material of the workpiece tested in this study was the aluminum cast alloy with high silicon (JIS ADC12), and the properties of the material listed in Table 2.
Table2� Properties of aluminum cast alloy (JIS ADC12) Cu Si Mg Zn Fe Mn Ni Sn Al Chemical properties 1.5-3.5 9.6-12.0 <0.3 <3.0 <1.3 <0.5 <0.5 <0.3 other Density Mg/m3 Solidification range ͠ Thermal Expansion ˜10-6/͠ Thermal Conductivity W/m㨯͠ Physical properties 2.70 515 – 580 21.0 92 Tensile strength N/mm2 2㧑 Offset yield Strength N/mm2 Elongation 㧑 Impact value k J/m2 Mechanical properties 295 185 2.0 81 Table3 Experimental conditions Cutting conditions Diameter of drill: 8mm Drilling position: 24mm in depth of drilling Cutting speed v: 50m/min Feed rate f: 0.05, 0.1, 0.2mm/rev Dry (Without any aid of coolant or lubricant supply) Air blow (Compressed air supplied through drill’s oil hole) supply air pressure: 0.8MPa Other conditions MQL (Oil mist supplied through drill’s oil hole) Equipment: Fuji BC Engineering Co., Ltd14) Fluid type: Vegetable oil Supply air pressure: 0.8Mpa Supply quantity:
And another factor, which must be considered, is the chip/flute adhesion (welding).
The chip/flute adhesion affects the chip formation and the chip removal strongly.

As a consequence, in recent years, remarkable research effort has been spent in the development of numerical models to evaluate preform properties.
The role of non-uniform spatial arrangement of fibers, as well as its relevant effect on the failure/damage properties of composite materials, has been highlighted by Vaughan et al in [20].
The opportunity of a proper consideration of the geometric disorder of the fiber distribution in RVE has been remarked in [21,22] and [23-26], respectively for mechanical properties and permeability calculations.
It was stated that periodic models could be used in some cases to compute effective properties if no safety assessment is needed [21].
Following these early works, this paper aims to investigate the influence of the stochastic variability of the fiber packing on tow properties.

Water's physical and chemical properties, as well as its capacity for self-purification, degradation, migration, and transformation, can be affected by the presence of organic matter. [7, 8, 9] 1-2- Resources of organic wastewater Organic pollutants, which make up the majority of contaminants in wastewater, are just one type.
The above-mentioned carcinogenic, teratogenic, and neurotoxic properties of many POPs, which are lipid soluble, are present.
Studying the main factors influencing this oxidation, such as the doses of H2O2 and Fe2+ and the dosing strategy of H2O2 at a pH value of about 3, helped treat this water by oxidizing it with Fenton Fe2+ H2O2.
The properties of the influent, the technique we used, the effluent's qualities, and the time spent treating them all, etc. all have an impact on the overall cost.
[13] Van den Berg M., Birnbaum L, Bosveld ATC.Toxic Equivalency Factors (TEFs) for PCBs, PCDDs, PCDFs for Humans and Wildlife.Environ.

This results in excessive friction wear which in turn affects the integrity of the suspension system and reduces the safe service life of the installation.
car + load diverting pulley compensating ropes counterweight traction sheave travelling cables factor 2:1 suspension ropes reeving L(t) Lcw(t) M(t) Mcw(t) w (t)0 w w V m x x V Fig. 1.
Structural Integrity and Vibration Suppression of Elevator Ropes The structural integrity of elevator suspension ropes decreases during their lifespan and properties of both steel wire and polymeric ropes change during their service.
The adverse resonance behaviour affects the structural integrity of the suspension system causing fatigue breaks of wires in steel ropes and destructive self abrading and repetitive compressive loads of fibres in aramid ropes.
Janovsky: Elevator Mechanical Design (Elevator World Inc., Mobile U.S. 1999)

The results of the experimental research proved that temperature and viscosity of the polymer found in liquid state are able to strongly affect the bubbles release and maintenance of wall thickness in thick-walled moldings.
They appreciated that the model proposed by Bellehumeur could be modified by considering a geometric factor.
Obtaining a layer of minimum thickness adhered to the internal surface of the mold, as a consequence of the mold rotation around a horizontal axis Sarrabi et al. [4] presented the results of a mechanical properties simulation process of rotomolded parts by considering the material microstructure, in the case of using the crystallization kinetics.
The above mentioned aspects ensure also the positioning of the mold at a certain distance r from the rotation axis and changing thus, between some limits, the rotation speed and the centrifugal force able to affect the flow of the liquid material in the mold cavity.

Especially, when dealing with uncertain influences e.g. by complex structure or a non-laboratory environment, these methods are often “able to characterize the underlying dependency of the identified features on the unobserved” factors [5].
For monitoring of single sensors the use of the Electro-Mechanical Impedance (EMI) is suggested e.g. by Park et al. [7].
Approaches discussed in the literature are the nonlinear factor analysis [10] or the local principal component analysis [11].
As features, physical properties as well as other significant parameters extracted from the recorded data, e.g.
Kullaa, Nonlinear Factor Analysis in Structural Health Monitoring to Remove Environmental Effects, Proc. 6nd Intl.