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Online since: September 2011
Authors: Ping Huai Mao, Bing Zhai, Run Dong Chen
The Green Design for the Moving Device of the Silt Coal Load Machine Pinghuai Maoa, Bing Zhaib, and Rundong Chenc School of Mechanical Engineering Anhui University of Science and Technology Huainan, China amaopinghuai@sohu.com, bzhaibings@163.com, crundongchen@sohu.com Keywords: Silt coal loader, Moving device, Green design, Sustainable development Abstract.
Introduction Green design as a key technology for sustainable manufacturing, the aim is to make the whole life circle (from the design, manufacture, use to scrap) of product affects the environment minimally and use resource efficiently [1].
To meet the required product requirements and quality design, the objectives of environmental factors should be fully considered.
Disassembly properties of products has a direct influence on the product recycling.
Zhang: Mechanical Management and Development, Vol. 01 (2006) No.6, P.22 (In Chinese)
Online since: September 2021
Authors: Iosif Tempea, Edward Rășchitor, Carmen Elisabeta Radu
In order to limit the transmission of vibrations at the design of an elevator’s foundation, all factors on which the problem’s settlement depend shall be considered: the land on which it is placed, vibration insulating elastic layer, the building, the elevator producing vibrations, foundation block In order to execute the foundation, the load-bearing capacity of the land, limitations imposed by the compaction of the land, the additional consolidation of the land, the drainage of the groundwater, etc. must be considered.
The parking lot shall be executed and exploited so that the regular operation does not generate noises or vibrations which might affect the health and peace of the users from the surrounding.
The rubber has very good damping properties, reducing the vibration energy and is a very good noise damper.
Bren 2012; Bucharest [3] M.M.Popovici, Mechanical Syntheses - Mechanisms, Machines, Aggregates - Ed.
Sándor, Programming interfaces with VISUAL BASIC 6.0) – The Blue Publishing House, Cluj- Napoca 2002 [5] I., Magheți, M., Savu- The theory and practice of the mechanical vibrations - Editura Didactică și Pedagogică 2007 [6] C.E.
Online since: December 2010
Authors: Qiang Yong Zhang, Jian Liu, Juan Song
Introduction Mechanical pramaters of rock or soil are complex, which are not uniform and will change with time.
Spatial variability means the correlation and variability of mechanical parameters between two different spatial ponits.
Because of the differences of mineral ingredients, depositional conditions, stress history, efflorescence and other geological factors, mechanical parameters of rock or soil express not only differences but also correlation[1,2].
When variation coefficient is fixed, change of fluctuation range also affects the computation result.
Variations of Rock Properties within a Quarry, J.
Online since: October 2015
Authors: A.S. Yanyushkin, V.Yu. Popov, Y.I. Zamashchikov
High contact pressure, high local temperatures and other unfavorable factors cause the cracks formation.
Naturally, the roles of the factors are tightly interconnected with each other.
To isolate any of them as dominating one is a task very complicated, therefore it is necessary to examine the factors as a complex.
The role of the thermal factor in the CEDG merits a particular attention.
Just in this very case, their unique mechanical and physical properties can be entirely realized.
Online since: May 2020
Authors: De Gui Liu, Jun Sheng Liu, Hai Bao Wu, Ji Zhen Li
Introduction GH4169 alloy is the most widely used superalloy material in aerospace engines, and its comprehensive mechanical properties are excellent [1].
However, due to factors such as circumferential flow and rebound of the material, the GH4169 alloy workpieces under various process parameters cannot be completely affixed, that is, there is a certain amount of expansion.
The basic research on the powerful spinning process of GH4169 alloy shows that GH4169 alloy has good properties under the conditions of suitable spinning process parameters (spinning temperature, rotary feed rate and rotor fillet radius).
The spinning performance and comparative analysis confirm that the spinning temperature has an important influence on the forming properties of the material and should be strictly controlled. 2.
Mechanical Research and Application, 1999(03): 32-33.
Online since: December 2012
Authors: Jian Lin, Yong Ping Lei, Hidekazu Murakawa, Nin Shu Ma
Joining dissimilar materials is always very difficult because of the differences in the chemical components and material properties.
Recently it was reported that if the thickness of inter-metallic compound layer between aluminum and steel is less than 10μm, the mechanical properties of aluminum and steel joint can be accepted [1].
The influencing factors on CMT brazed joint strength are presented. 2.
In order to examine the changes of mechanical properties of aluminum alloy after brazing, the micro hardness in the cross section of the aluminum part, including the weld metal and base metal, was measured as shown in Fig. 3.
Effect of a post-weld heat treatment on the mechanical and microstructure properties of AA6061 joints welded by the gas metal arc welding cold metal transfer method.
Online since: October 2023
Authors: Mohd Amirul B. Mohd Snin, Izwan B. Johari, Nuratikah Ahmad Nordin, Noor Nabila Aznan, Nurulfatin Aqilah Mohd Yazid
This is one of the factors that contribute to high values of absorption of the CEPS concrete block.
The mechanical and physical properties of concrete containing polystyrene beads as aggregate and palm oil fuel ash as cement replacement material. https://doi.org/10.1063/1.5005349 [7] Al-Menyawi, Y.
An Investigation into Mechanical Properties of Self Compacting Concrete Incorporating Fly Ash and Silica Fume at Different Ages of Curing.
Properties of crumb rubber hollow concrete block.
Properties of concrete containing scrap-tire rubber – an overview.
Online since: November 2005
Authors: Jian Ming Gong, Fu Zhen Xuan, Zheng Dong Wang, Shan Tung Tu
The short term mechanical properties of the materials were obtained on the dynamoelectric hydraulic servo testing machine INSTRON8032 at temperatures of 20,500 and 565o C.
Table 1 Mechanical properties of 2¼Cr1Mo steel Temperature ( o C) E (MPa) σ0.2 (MPa) σb (MPa) Elongation (%) Reduction in area (%) A×10-26 n 20 1.89×105 428 566 21.4 80.6 / / 500 1.60×105 330 412 22.4 81.2 1.623 9.65 565 1.54×105 315 355 19.7 79.2 1.733 9.732 Table 2 Geometrical dimensions of CT specimens and testing initiation condition Specimens W (mm) Bn (mm) B (mm) ao (mm) F (kN) KI (MPa⋅m0.5) σnom (MPa) ti (h, ∆a=0.2mm) tf (h) CTA-1 25.2 10.00 12.31 8.50 10.79 41.98 456 64 225 CTA-2 25.1 10.00 12.31 12.50 4.90 26.76 387 600 910 CTA-3 25.1 10.60 12.56 12.20 5.88 29.78 416 360 522 CTA-4 25.2 10.35 12.46 12.42 6.86 35.87 510 43 120 CTA-5 25.3 10.10 12.35 8.50 9.81 34.05 407 174 370 CTA-6 25.0 10.45 12.50 12.45 7.85 41.70 596 30 49 CTA-7 25.2 10.50 12.45 12.40 6.37 33.08 465 78 173 CTB-1 25.0 9.60 12.80 12.52 6.00 33.15 502 145 234 CTB-2 25.0 6.40 12.80 12.54 5.00 33.91 629 26 57 CTB-3 25.4 6.20 12.80 13.15
From the experimental results, it is apparent that there is no clear linear relationship between the measured load-line displacement ∆c, creep crack extension ∆a, testing load F and stress intensity factor KI.
This is a little surprising as it has been observed that the creep displacement ∆c, which is utilized in c matK calculation, is clear affected by temperature.
The influencing factors such as time and temperature were discussed.
Online since: May 2012
Authors: Yao Wu Shi, Zhuo Xin Li, Guo Dong Li, Qing Bao Wang, Hui Wang
In the overlaying process, some special materials are deposited on surface of the roller up to a certain thickness to meet the property requirement of the roller.
The cracks and peeled off chunks seriously affect the application of pinch roller.
The residual austenite can easily become the gathering region of inclusions and harmful gas such as hydrogen and oxygen due to high alloy composition and contents of hydrogen, therefore, it may become the potential factors, which result in the initiation and propagation of cracks.
[9] Chinese Mechanical Engineering Society Welding Society, Welding Handbook -Material Welding [M] Mechanical Industry Press (Second Edition) 2001.7:122-132 (in Chinese) [10] Zhou Zhenfeng and Zhang Yue, Welding Metallurgy and Metal Weldability [M] Mechanical Industry Press (Second Edition) 1998.11:200-204 (in Chinese) [11] I.R.
Stress intensity factors for through-thickness cracks in a wide plate: derivation and application to arbitrary weld residual stress fields[J].
Online since: July 2022
Authors: Max Böhnke, Christian Roman Bielak, Mathias Bobbert, Gerson Meschut
The influences of strain hardening and sheet thickness on the joining properties must be investigated.
Introduction The production of sheet metal components involves several production steps that influence the resulting component properties.
The influences of strain hardening and sheet thickness variation on the joint properties were analyzed.
According to the manufacturer's data sheet the chemical compositions and the mechanical properties of the investigated materials are shown in Table 1.
Table 1: Chemical compositions mechanical properties of investigated HCT590X [13] HCT590X (wt.-%) Min.
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