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Ordinary architectural sand showed a round, smooth surface and perfect rheological properties,but it was hardly bonded with gelled material.
In Fig. 2, the mechanical strength is shown for the influence using different sand as coarse filler.
However, the admixture dispersion and slag powder hydrated activeness were the main factors that affect the shrinkage of the cement mortar.
Fig.4 Effect of slag sand replacement on drying shrinkage properties of mortar Conclusions Calcium carbonate sand presents higher strength values than that of others because the structure of mortar was produced more densification.
Effect of superfine slag powder on cement properties[J].

The analysis took in account the thermo-mechanical phenomena with temperature dependent steel properties.
The other considered also the phase transformation and phase-dependent thermal and mechanical properties.
Table 2 Mechanical properties of the steel used.
Materials properties are phase and temperature dependent (table 5 for room temperature mechanical properties).
Mechanical properties of each phase were introduced in the code.

Improving the Mechanical Properties of a Machine Component of A Fishing-net Weaving Machine by Duplex Coating Naphatara Intanon1,a, Charnnarong Saikaew2,b, Anurat Wisitsoraat3,c, and Parinya Srisattayakul4,d 1,2,4Department of Industrial Engineering, Khon Kaen University, Thailand 3National Electronics and Computer Technology Center, Thailand anaphatara.int@neu.ac.th, bcharn_sa@kku.ac.th, canurat.wisitsoraat@nectec.or.th, dparinya28@yahoo.com Keywords: Duplex coating, sputtering, electroplating, hardness, weaving machine Abstract.
In this study, the mechanical properties of a weaving machine component made of cast stainless steel are improved by the duplex coatings of electroplated hard-chrome and sputtered metal nitride layers.
In addition, the hardness of single-layer coating either with hard-chrome or metal nitride was only 2-3 times higher than uncoated ones whereas duplex coating with both layers synergistically increases the hardness by a factor of 7-8.
Non-plated samples were also sputtered at the same time as the plated ones in order to compare the effect of duplex coating on the surfaces and on the mechanical characteristics of the hooks.
The results indicate that the hardness of the underlying layer or material can substantially affect the hardness of the top surface layer.

The properties of soil-cement materials are influenced by several factors, including type and proportion of soil, cementitious materials, water content, compaction, uniformity of mixing, curing conditions, and age of the compacted mixture.
Impacts of soil types, gradation of soils, and cement content on the mechanical properties of soil-cement mixtures are investigated.
Factors affecting the properties of soil-cement materials are studied.
Index properties of the eight soil types.
Pecker: Static and Dynamic Properties of Sand-Cement, J.

Conduct appearance observing and sealing property test on welded pipe joint.
Therefore, as for welding process, technical parameters (heating temperature, welding pressure and time), flow property of material fused mass, surrounding temperature etc. are all key factors guaranteeing molecule dispersion and coiling, and all work shall be done by focusing on the accuracy and stability of technical parameters.
If any of these parameters varies, the formation of crystalline zone of melted surface will be affected, which will affect the welding quality of joints.
As shown in Fig. 4, under the condition that temperature and pressure are determined according to the technical regulations, shift time (T3) and pressurizing time (T4) are important factors ensuring welding quality of pipe joints.
[3] Preparation and mechanical research of MC nylon and nanometer composite materials [J] China Plastics Application 2005.33 (7): 7-9.

Table 1 is the material properties of the ring, and Table 2 shows the result compared with the previous data for the perfect ring to check the validity of the natural frequency for mode.
In this study, material properties of silicon ring is as follows In Figure 2, two types of graphs are shown due to the Coriolis force by direction of rotational motion.
But with fast backward rotation, Q-factors are reversed.
Thus, these factors should be considered when designing resonator.
Fig. 2 Q-factors of ring with rotational speed.

The fabrication of successful, high-quality joints depends on crucial factors such as welding parameters, input variables, and material selection [1].
The chemical composition and mechanical properties of the original sheets are available elsewhere [10].
The formation of these IMC compounds is significantly influenced by factors such as pressure, temperature, and strain rate.
This reduced strength in the aluminum-steel joint can be attributed to the presence or formation of the IMC layer, which negatively impacts the mechanical properties and overall performance of the joint.
Kuriachen, “Mechanical and microstructural properties evolutions of various alloys welded through cooling assisted friction-stir welding: A review,” Intermetallics, vol. 133, no.

Zhao[3] founded that stir-head rotation speed, welding speed, welding angle were of the key factors to influence quality of welded zone; and only suitable matching process combination might ensure to form excellent welded zone.
Bi[4] had studied microstructure and properties of welded joint of 7A52 aluminum alloy by electron beam welding and pointed out that average impact toughness of welded joint reached to 27.67Jcm-2, which was 82.4% of that of the 7A52 matrix.
The mechanism of rare earth element addition in welding wire to improve mechanical property of welded joint was analyzed.
Microstructure and Properties of Welded Joint of 7A52 Aluminum Alloy by Electron Beam Welding [J].Hot Working Technology,2011,40(7):151-152 [5] YU Jin, WANG Kehong, XU Yuelan,LIU Yong.
Microstructures and properties of 7A52 aluminum alloy welded joint by twin wire welding [J].

Tribological properties of Ekonol composites friction material in traveling ware ultrasonic motor Fengyan Sun1, a, Jianjun Qu2,b 1 National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083,China 2 Department of Mechanical Engineering, Harbin Institute of Technology, Harbin 150001, China afysun@ustb.edu.cn, bthqjj@163.net Keywords: tribological properties, EKonol composites, traveling wave ultrasonic motor.
Then Ek2 and Cu rotor is a good friction combination which can satisfy the actual running needs of TWUSM. 1 Introduction Traveling wave ultrasonic motor(TWUSM) is driven by friction force between stator and rotor, then the tribological properties of contact interface is one of the important factors which can effect the life and performance of TWUSM.
Then effects of driving mode and friction pair combinations for tribological properties of motor contact interface.
Compared with other stator-rotor combinations, its no-load speed is highest, and output power is also highest in larger range of load torque. 3.3 Wear characteristics Wear resistance of friction material is one of the important factors to affect the motor life.
Wear Properties and Life Prediction of Friction Materials for Ultrasonic Motors.

The development of numerical methods that are easy to algorithmize significantly affected the expansion of many fields of technology [7 - 10], including the methods of analysis and synthesis of vibration reduction [11 - 14].
Depending on the amplitude of vibration of the desired kinematic quantity the next graphs are being considered: of flexibility , of mobility or of accelerance : (4) If it is know the value of such amplitude then, using the graphical interpretation, showing the desired dynamic properties as dynamic characteristics, it is possible to determine the value of the coefficient [4].
For this it was used the problem of synthesis of vibrating mechanical systems.
Dymarek, The sensitivity as a criterion of synthesis of discrete vibrating fixed mechanical system, J.
Świder, Hybrid graphs in modelling and analysis of discrete-continuous mechanical systems, J.