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Online since: December 2012
Authors: Qing Fang Ma, Chao Wei Hao, Jiang Li, Zheng Wang, Jiang Xiong Jiang
The influence of masterbatch’s content and spinning technologies on the properties of FDY fibers with porous superfine-denier is also particularly discussed.
Nowadays, superfine fibers have attracted more and more attentions from peoples for its occupying the special properties, and the research on the superfine fibers is developing quickly [1].
As shown in table 1, when the content of the LiCl is 0.04% (wt/wt %), the spinning process is the most successful and the properties of the fibers are the best.
Figure 2 The morphology of superfine-denier fiber (A) and normal fiber (B) Table 1 The influence of masterbatch on the mechanical properties of Nylon 6 FDY fiber In addition to the influence of rare-earth content on the spinning process, other parameters, such as the spinning temperature, oiling agent concentration, quenching unit and spinning speed, etc., could affect the spinning process and the fiber properties as well.
Table 2 The process parameters of superfine-denier Nylon 6 FDY fiber Conclusions The preparative and applied technologies are the key factor for producing the porous superfine-denier Nylon 6 FDY(22dtex/35f).
Online since: February 2020
Authors: Denis Veselov, Nikolay Samotaev, Artur Litvinov, Konstantin Oblov, Anastasia Ivanova, Maya Etrekova
The results show possibility to fast fabrication functional sensor in customer ceramic SMD package with base 9x9 mm with twice reduced power consumption and improving mechanical properties compare with classical metal-glass microelectronic packages using before for such type sensors.
The improvement of the situation with MIS capacitor-type sensors is seen in the adaptation of laser micromilling technology already used for the manufacture of metal oxide sensors in form-factor of SMD package and described in [11–13].
The conversion to a technology there are microheater integrated in a single technological cycle with package will also significantly improve the mechanical stability of the sensor performance, saving sensor design from adhesive joints that are susceptible to destruction during long-term exposure to corrosive gases and high temperatures typical for use in applications for the detection of sub-ppb gas concentrations H2S [14], C2H6S [15] NH3 [16], NO2 [17].
The flexible technology used in our work allows to continue to improve the MIS sensors in directions of changing geometric dimensions (affecting the capacitance of the MIS structure [18]) and gas sensitivity associated with the temperature conditions of operation (acceleration or stopped physical adsorption of gases [19]).
The influence of technological factors on the hydrogen sensitivity of MOSFET sensors 1992 Sensors and Actuators: B.
Online since: February 2013
Authors: Xin Jin, Zhi Jing Zhang, Xi Zhang, Ting Yu Zhang, Jian Feng Chen
The study finds that components manufacturing features from the manufacturing process (including machining, assembly, et al) are the main influencing factors of assembly accuracy and precision stability of precision mechanical system.
Factors effect 3D surface morphology of turning parts including the feed rates, processing method, the workpiece materials, geometry of cutting tool and the vibration between cutting tool and workpiece, etc[8,9].
The simulation result shows that the distribution of form error affects stress distribution of contact surface of parts assembly.
The Property Analyses in Sliding Lubricated Rough Contacts[J].
The mechanical properties, dimensional tolerance and microstructural characterization of micro-molded ceramic and metal components[J].
Online since: July 2006
Authors: J.M. Wang, Zhan Qiang Liu, Yi Wan
Wan 1,c 1 School of Mechanical Engineering, Shandong University, China 2 Shandong Metallurgic Technical Institute, China a melius@sdu.edu.cn, bztz668@sina.com, cwanyi@sdu.edu.cn Keywords: High speed machining, Turning machinability, Austenitic stainless Steel, Ceramic tool Abstract.
High strength, low thermal conductivity, high ductility and high work hardening tendency of stainless steels are the main factors that make their machinability difficult.
The main constitutes mechanical properties of LT55 are listed in Table 1.
Table 1 Main constitutes and mechanical properties of ceramic tool LT55 Main constitutes Flexural strength [MPa] Fracture toughness [MPa m1/2] Vickers's hardness [Gpa] Al2O3/TiC 900 5.04 21.5 Results and discussions Chip Formation and Chip Color.
As was explained in the previous section, it was deduced from the chip's color, which is the most obvious indication of temperature of chips, that the chips formed at 110 m/min and 160 m/min cutting speed were affected most from the heat and therefore had the higher temperature when compared to at higher cutting speed of 210 m/min.
Online since: December 2016
Authors: Fusahito Yoshida, Jiro Hiramoto, Akinobu Ishiwatari, Masaki Urabe
To identify the factors for the occurrence of springback, the stresses at the bottom dead point in a pressed part is focused on.
The mechanical properties of this sheet are shown in Table 1.
Table 1 Mechanical properties Fig. 1 Simple model for tension To clarify the influence of the stresses of each element on springback, springback-root-cause analyses were performed.
Its mechanical properties are shown in Table 6.
Fig. 3 Shape of center pillar inner Table 6 Mechanical properties To investigate the springback deformation by press forming and the stress distribution in the part at the bottom dead point, general FEM analyses of press forming and springback were carried out.
Online since: April 2015
Authors: Ming Xie, Ming Wen, Guo Quan Zhang, Chuan Ting Ren, Qi Bing Cheng, Wei Ming Guan, Yue Shen
Introduction Ultrafine-grained (UFG) materials has become a hot topic for the manufactures and researchers due to their superior physical properties such as Curie temperature, magnetic and diffusion coefficient and so on and their superior mechanical properties such as high strength and high plasticity and so on, different from the properties of the traditional materials.
But the mechanism of deformation and refinement of ECAP was not yet clear, so it is necessary to explore further the various factors.
Influnece of Stacking Fault Energy on the Microstructures, Tensile and Fatigue Properties of Nanostructured Cu-Al Alloys [J].
Investigation on Fabrication, Investigation on Fabrication Microstructure and Mechanical Properties of Bulk Ultrafine-grained Copper[D].Nanjin:Nanjing University of Science and Technology,2004
Effects of Route on Microstructural Evolution and Mechanical Properties of Cu-8 wt Pct Ag Alloy Processed by Equal Channel Angular Pressing[J].
Online since: June 2021
Authors: Yulia Usherenko, Viktors Mironovs, Sergey Usherenko
The transformation of the structure during dynamic alloying leads to a change of the composition and mechanical properties of the matrix material.
Changes in the properties of aluminum alloys occurs at concentration 0.001 – 0.1 % of alloying elements.
Structural elements (channel elements) formed in the matrix material (Al 99.7 %) after dynamic alloying with a stream of SiC powder particles The appearance of new structural elements should affect the mechanical properties of the obtained material.
The Effect of Dynamic Alloying on the Change of Mechanical Properties of Aluminum and its Alloy.
The change in mechanical properties is indirect evidence of a change in the physical properties of the material.
Online since: October 2021
Authors: Shen Wang, Bin Dai, Jin Kai Xu, Le Tong, Mao Xun Wang, Guang Jun Chen
It has strong corrosion-resistance and good mechanical properties, which is more suitable for aerospace area and shipboard [1]. 7075 aluminum alloy is widely used in industry, and the precision and high-quality processing of small parts are very important.
In this paper, the influence of the three factors of spindle speed, feed rates and ultrasonic amplitude on the surface roughness of UAG on 7075 aluminum alloy is studied.
The mechanical properties of 7075 aluminum alloy are shown in Table 2.
Mechanical properties of materials [8].
Conclusion The influence of the three factors of spindle speed, feed rates and ultrasonic amplitude on the surface roughness of UAG on 7075 aluminum alloy is studied and the following conclusions are drawn: 1.
Online since: October 2013
Authors: Ying Yu, Shi Xin Lan, Ping Zhou, Yao Run Peng
Wave spring is a key component of multi-disc wet clutch and the response speed and running quality of multi-disc wet clutch is affected by its characteristics.
(3) Other factors are not considered.
Wave spring model is imported into ANSYS10.0 after establishing in CATIA V5. 8 -node Solid45 unit is selected to mesh the model because it has some characteristics such as creep properties, plasticity, expansibility, large deformation and large strain [3-5].
Setting the material properties of wave spring, the elastic modulus of material is197GPa, Poisson's ratio is 0.282; material density is 7.82×103Kg/m3 [1].
At this moment, the most important factor that impacts load-deformation relationship of wave spring is the wave number of wave spring.
Online since: September 2013
Authors: Xin Wang, Xiu Juan Liu, Chun Guang Wang, Yong Sheng Liang, Yong Ji Lu, Sheng Yang
Introduction The complete stress-strain curve of rock is the mechanical property data which is used mostly and the most elementary and important.
Due to the linear model is difficult to take into accountthe mouth of the time-varying characteristics of the system and the servo valve nonlinear factors such as, so can't accurately describe the system dynamic characteristics, so in a linear system is established on the basis of the nonlinear model, as type (10). q (flow) is a variable.
(11) To load, because of system is a mechanical testing machine, the main measurement of mechanical properties of materials.So when loading, the system speed is low, damping load can be neglected.
We can object to be tested as a stiff spring, only affected by the stiffness coefficient K.
Elastic energy storage of the test machine test on rock mechanical properties [J], Mechanics and Practice, 2005 (27) :51-52 [3] Y.
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