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Online since: October 2014
Authors: Gheorghe Brabie, Robert Stefanut Teaca
The material used in this analysis is copper - zinc alloy with anisotropic properties.
There are multiple factors that affect the geometry deviations: sidewall angle, friction coefficient, tools gap, punch radius, and punch speed.
As a result, it is necessary to build an optimal design guideline derived from understanding the actual phenomenon of material deformation, the variation of material properties and interaction phenomena in the process.
There are many factors which affect springback, such as anisotropy of the material, shape of the final mini part, friction conditions and process parameters.
The CuZn37 alloy is described by the following properties: density 2,7x10-9 t/mm3; elastic properties: Young's modulus: 7.0x105 MPa; Poisson's ratio: 0.3 and anisotropy coefficient 0.658.
Online since: December 2019
Authors: Ruslan V. Lesovik, Sergey V. Biryukov, Alexander E. Fomin, E.S. Glagolev
Introduction In modern conditions of creating building materials with a preset technical and operational characteristic the regulation and use of the raw materials and their mixtures surface properties is a necessary factor.
Numerous studies have confirmed the important role of the particle size distribution, the properties surface nature and specific surface in the raw mix for regulating the physical and mechanical building materials characteristics [1–5].
An important role in changing the particles surface energy properties is played by mechanical activation [11–13].
The mechanical activation measure can be considered as the amount of accumulated surface energy in the form of defects in the crystal structure of quartz, affecting the activation energy of the chemical interaction reaction and the kinetic constants of the processes.
The maximum technogenic raw materials energy potential use, taking into account the surface properties of the particles, will later serve as an important factor in controlling the physical and chemical processes of phase and structure formation of binders during autoclave hardening to achieve the finished products’ required physical and mechanical properties.
Online since: July 2014
Authors: Yi Nan Lai, Chong Xun Wang, Xu Du, Hui Ping Zhang
Turning Test and Simulation of Difficult to Cut Materials 300M in Aviation Zhang Huiping1,a, Lai Yinan 1,b*, Wang Chongxun 1,c, Du Xu1,d 1College of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin 150080, China a zhping302@163.com, blaiyinan@126.com, c 64744591@qq.com, d1090348602@qq.com Keywords: difficult-to-cut materials; cutting force; linear regression Model; finite element analysis Abstract: Turning process properties of difficult-to-cut materials used in aeronautics are often associated with the machining accuracy and surface quality of aerospace structural parts.
Introduction Ultra high strength steel 300M has high strength, high transverse plasticity, fracture toughness and good anti-fatigue performance in mechanical properties, etc.
In according to the properties of material and lathe the SANDVIK indexable tool with cemented carbide is selected, and the blade type is CNMG120408-PM 4225.
This paper researches on how cutting velocity v, feed rate f and back cutting depth ap affect the cutting force and cutting temperature(θ) under the given tool, so the three factors are selected to carry out orthogonal test, and four levels are chose on basis of the material properties of the tool and workpiece.
The orthogonal table of three factors at four levels is adopted in this test, as shown in table 1.
Online since: July 2024
Authors: Sitthi Duangphet, Somwan Chumphongphan, Nattakan Soykeabkaew, Nattaya Tawichai, Uraiwan Intatha, Teeratada Yanwattana
Additionally, the mechanical properties of the subsequent cast plaster specimens were also investigated.
According to classical nucleation theory, super-saturation is one factor affecting the nucleation and growth of alpha-HH whiskers.
Physical and mechanical properties of the specimens.
Adding 0.6 g CuCl2 can noticeably influence the phase structure, particle morphology, and physical and mechanical properties of the resultant plasters.
P., Effects of plaster to water ratio on physical and mechanical properties of ceramic pieces produced by the slip casting process.
Online since: October 2018
Authors: Vladimir P. Shveikin
Investigating the factors of thermomechanical processing which exert the most significant influence on the structure and properties of a finished product is an urgent task.
Consider now the technological parameters that affect the structure, and hence the mechanical properties, of the steel after HTTT.
The complex influence of parameters tb.d. te.d. and tt on mechanical properties can be generalized in the form of nomograms.
Summary In the real world of HTTT, all of the above parameters affect the structure and properties simultaneously.
The most significant factors are time and temperature.
Online since: July 2011
Authors: Sadegh Moeinifar
Influence of anisotropy behavior in UOE process for X80 micro alloy steel Sadegh Moeini Far Engineering School, Islamic Azad University, Shoushtar Branch, Shoushtar, Iran moeinifar@gmail.com Keywords: Microstructure, micro alloy steel, Mechanical properties, Forming, Anisotropy, Toughness, Fracture.
The anisotropy of tensile properties and charpy impact fracture toughness and its relationship with UOE pipe forming has been study on X80 micro alloy steel.
Mechanical properties of line pipe steels can be anisotropic due to the plate manufacturing and pipe forming processes.
Anisotropy of mechanical properties studied for lower micro alloy steels.
Tensile properties and charpy impact fracture toughness were carried out according to ASTM E8 and ASTM E23.
Online since: April 2013
Authors: Al Emran Ismail
However due to several factors such as corrosion, material and design defects, mechanical failure is unavoidable.
This expression is derived as functions bar geometry, loading and material properties as follows (7) where J = Je + Jp, and F*I = FI,a + fFI,b.
It is also affected by the crack aspect ratio and relative crack depth.
Ghazali, Stress intensity factors for surface cracks in round bar under single and combined loadings, Meccanica, 47 (2012) 1141-1156
Ghazali, Stress intensity factors under combined tension and torsion loadings, Indian J. of Engineering and Material Sciences, 19 (2012) 5-16
Online since: January 2012
Authors: Kun Yang, Song Liu
The experimental results indicate that stiffness is the main factor affecting the bending deformation.
Yarn diameter and needle geometry are another two important factors influencing the bending deformation.
As a result, yarn diameter and mechanical properties affect the curvature radius of the needle loop, further influence the plastic deformation of loop and the loop shape.
The results showed that fiber properties and the knitting parameters affect the bending deformation of stainless steel fibers.
The stiffness of fiber and the needle diameter is the most important factors.
Online since: October 2011
Authors: Jin Liang Hu, Jun Lou, Hong Chan Sheng, Guo Xing Chen, Ke Feng Huang, Ze Kun Liu, Yi Ling Shi, Song Yin, Lin Ye, Shu Hui Wu
The influence of processing parameters on residual stresses, microstructure and properties are discussed.
Introduction Most failures of materials originate from their surface and are sensitive to their microstructure and properties.
Special attention is paid to residual compressive stresses, microstructure and properties after LSP[2-4].
Experiments with aluminum alloys showed that the hardness properties of the non-heat treatable (5086-H32) and over-aged (2024-T3, 7075-T73) alloys were significantly improved as compared with the un-shocked properties [10].
But the systematic research on properties of LSP treated metal and alloys in crucible environment, which involves more influencing factors, therefore extremely difficult to gain total understanding, also needs more efforts.
Online since: March 2011
Authors: Kurniawan Miftah, Edy Herianto Majlan, Wan Ramli Wan Daud
The assembly of proton exchange membrane fuel cell (PEMFC) is the important factor for the performance.
The amount of the assembly pressure depends on the shape of geometry, the dimension and the mechanical property.
All the component must be defined the mechanical property.
The mechanical property of components is assumed as isotropic material.
From the mechanical property, the characteristic of material will be known to investigate fuel cell behavior.
Showing 4391 to 4400 of 26166 items