Search results

The results showed that the cutting speed and feed were the main significant parameters affecting the cutting temperature, while depth of cut and quadratic term of cutting speed had a moderate effect.
The heat generation and temperature at cutting zone in hard machining affects tool wear, tool life and surface integrity.
The temperature at the cutting zone is greatly influenced by the cutting parameters and the physical and thermal properties of the tool-workpiece material.
The cutting speed is most dominant factor, which raises the cutting temperature significantly in turning of hardened AISI 4340 alloy steel with cubic boron nitride (CBN) tool inserts [12].
The cutting speed, feed and depth of cut are most influential factors on cutting temperature, the increase in the levels of cutting parameters raises the cutting temperature in hard turning of AISI D3 steel at elevated hardness of 60 HRC using CBN tool inserts [13].

However, tables are often inaccurate because of insufficient knowledge of the pipe properties and geometry.
The greatest error, however, is likely to be in the estimate of the wavespeed as this varies dramatically depending on the pipe, such as the material properties and the geometry [4,5,8,9].
Of interest here is how an error in the wavespeed affects the estimate of the distance .
It is also probable that the wavespeed estimate may be different in the two directions due to various factors in the measurements.
These predominantly affect the signal to noise ratio which has a profound effect on the wave speed estimate.

The model was built with Equivalent Materials (EMs) characterized with appropriately scaled mechanical properties according to the similitude methodology.
The mechanical properties of the three different Hagia Irene masonry types and related scaling factors for the preparation of the shaking table tests were illustrated in a previous work [1].
Whereas, the time scaling factor was equal to 3.16 (square root of 10).
The latter resulted very similar the global FRF, confirming that the central arch is the most important macroelement affecting the global behavior of the structure.
This is particularly important as the used time scaling factor led to seismic input duration of less than 15 s.

Introduction: Polymer–nanocomposites combine desirable physical and chemical properties of both organic (i.e., solubility, large polarizability, high photon absorption, bio functionality, and plasticity) and inorganic (i.e., wide range of electronic, magnetic, optical, thermal, and mechanical properties) components.
However, the final structure developed by the above process is continuous and thereby severely affecting the specific surface area of the films.
The functional property of the resulting membranes is expected to be the sum of properties of the inorganic and polymeric components.
The resultant films showed excellent mechanical, thermal and optical properties.
One of the factors to be improved for better photovoltaic parameters is to reduce the percolation threshold thereby providing better connectivity with the nanowires.

Such models apply geometric approximations of the bend features to be produced to provide the bend allowance for each bend line, depending on the characteristics of the bend features, such as bend angle, inner radius, sheet thickness, and material properties.
Secondly, a mathematical model estimating the dimensional accuracy of a part based on the errors from the major influencing factors is established.
Methodology The mathematic models presented below quantify the relationship between the dimensions obtained in a part and the influencing factors listed in the previous section.
Fig. 1 Influencing parameters used in the analytical models for bend angle and bend lengths In such steps, dimensional inaccuracies from various factors contribute to the inaccuracies of the newly formed bend length and bend angle based on the geometry model through the equations (1) and (2) where the sensitivities of participating factors can be derived.
In order to minimise the fluctuations in material properties, the sheets were taken from the same coil that was cold rolled, annealed and skin-passed.

Williams1 1 School of Mechanical, Materials, Manufacturing Engineering and Management, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
The resulting high performance drive shafts are smaller, lighter and have thinner walls and it is essential that the factors affecting instability are known and understood.
Material Properties.
The material properties were assumed to be rate independent.
This established that an imperfection factor of the order of 1 to 5% would be appropriate.

Sliding Mode Control Scheme for Tele-Operation Manipulator Rui Tang School of Mechanical & Electrical Engineering, Pan-zhihua University, Jichang Road No.10, Sichuan, Panzhihua617000, China School of Manufacturing Science and Engineering, Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu61065, China apzhutr@163.com, Keywords: Master and Slave Manipulator; Sliding Mode Control; Chattering; Reaching Law; Simulation; Abstract.
Considering that the quality and stability of servo system will be affected by the chattering phenomenon in the SMC, a reaching law approach was used to reduce the chattering phenomenon.
Because of the chattering, the property of servo system will be damaged [5].
By the paper [7], the time delay switch, space delay switch, system inertia and other factors result in chattering.

Addition of nickel was seen in some stainless steel grades to promote better corrosion resistance without compromising the mechanical properties.
Future scopes are available for research on effect of welding parameters on mechanical properties and corrosion resistance of laser welded SASS joints.
Improved mechanical properties of aluminum modified ultra-pure 429 ferritic stainless steels after welding.Materials Science & Engineering. 2019: A749; 210–17, [4] A.
Some Unexpected Properties of 18 and 8 Chromium.
Effect of heat input and accumulated fatigue damage on mechanical properties of dissimilar AL-6XN/316L welded joints.

Pereloma1,c 1School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, Australia 2 Previously with the Department of Materials Engineering, Monash University, Clayton, Australia aazdiar@uow.edu.au, bssh755@uow.edu.au, celenap@uow.edu.au Keywords: Low carbon steels, Cr addition, annealing, recrystallization, texture.
Compared to the unalloyed steel, Cr addition significantly delays the time for recrystallisation and increases the JMAK pre-exponential factor (k) by an order of magnitude.
Both ageing processes adversely affect the final properties of LC steels such as the strength-ductility balance, formability and surface quality.
It is clear that Cr addition delays recrystallisation and significantly alters the pre-exponential factor (k) of the JMAK fit by an order of magnitude.
Summary Studies of recrystallisation behaviour in cold rolled low carbon steel with and without Cr addition shows that Cr delays recrystallisation and affects the texture and morphology of recrystallised grains.

However, the developed RC foundation is so new that the mechanical properties, especially the stress state, are less researched and reported.
According to Saint-Venant principle, the role, which the ground at the bottom of the model will not affect the deformation of the wind driven generator will be considered, therefore, the immovably confined boundary at the bottom surface of the model and the normal direction constraint boundary at the circumferential direction side of the model are taken for the FEA model.
Table 1 The load standard value at the top of the foundation steel stub (without safety factor of 1.35) Name of project situation Fx (kN) Fz (kN) Fy (kN) Mx (kN·m) Mz (kN·m) My (kN·m) Normal operating loads 350.6 -111.8 1969 8263 20530 -47 Extreme loading 84.22 575.5 1891 -31391 1995 170.3 According to China RC Foundation Design Code, the limit state design method is applied in the paper and the extreme load case is used for the design and calculation.
The dimension and material properties are the same with the above developed one, and the same load (ultimate load) is applied on the two kinds of foundations, to compare the results of the stress and displacement and observe the difference between two kinds of foundations and the superiority of the anchor foundation.
(3) This new type rock anchor foundation is safe and reliable by compare with the mechanical properties of the non-anchor foundation, and the application of the rock anchor RC foundation of the wind driven generator has the superiority of resisting overturning.