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AZ31 and experimental alloys were strip cast and their microstructure and mechanical properties were discussed as compared to those of commercial AZ31 alloy sheet.
Mechanical Properties.
Discussion There are several factors which control the solidification microstructure, e.g., freezing range and degree of superheating (temperature gradient).
Tensile properties of the strip cast alloys.
Presence of fine intermetallic particles in the microstructure is quite beneficial for mechanical properties.

Iron loss, however, is affected by many factors such as the rotating speed of the motor [2-3], the field that penetrates magnetic cores and the resistance of magnetic cores.
However, the properties of ring-shaped AMM cores which are applied to motors can be different from the properties of single sheet due to many factors such as the lamination factor (Space factor: proportion of amorphous alloys in the entire laminated product), the lamination direction of the cores, the insulation between material layers and the heat treatment condition.
Two adverse factors prevented an even greater reduction in stator core loss.
The lamination factor is about 90%.
The comparison on the magnetic properties of the amorphous stator core and those of silicon steel shows the core loss of the laminated amorphous core was 42W /kg at 1 kHz, 1. 0T while the core loss of silicon steel was 102W /kg.

The effects of the sputter-etching parameters on the formation of conical protrusions on the surface of SUS304 stainless steel Tao Bai 1, a, Qinglian Zhang 2,b College of Mechanical Engineering, Donghua University, Engineering Research Center of Advanced Textile Machinery, Ministry of Education, Shanghai 201620 Tube, Pipe & Bar Technology Center, Research Institute, Baoshan Iron & Steel Co., Ltd., Shanghai 201900, China abaitao@dhu.edu.cn, bzhangqinglian@baosteel.com Key words: sputter-etching; radio frequency; SUS304 stainless steel; protrusion Abstract.
Introduction Plasma-assisted surface modification is an important material process for modifying material surface properties [1-5].
The velocity of ions and the kinetic energy are affected because of the strong magnetic field between the anode and the substrate.
Furthermore, the uneven distribution of the magnetic field around the sample surface reduces the distribution uniformity of the ions sputtering on the sample surface, which could affect the uniformity of the conical protrusions on the sample surface.
Conclusions For SUS304 stainless steel, the sputtering power, the anode-to-substrate distance, the argon gas flow ratio and the sputter-etching time were important factors in protrusion precipitation on the steel surface.

Identification of eddy dynamometer in vehicle emission test based on SMI method Ping Liu 1, a 1 School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China a univerlp@126.com Keywords: vehicle emission test ,subspace model identification , eddy dynamometer.
To solve the parameter estimation problem ,many parameter estimation algorithms are based on mathematical optimization These identification algorithms not only require the user to select a specific set of model parameters, but also require the user to accurately select the initial value, these two choices play a critical influence on the optimization results, then affecting the quality of the identification model.as an effective way to identify the multi-input multi-output system.the subspace model identification (SMI) method has gained wide attention in recent years[1,3].This method is superior than the traditional method in complex high-order systems[4].
Multi-level test of the two factors is carried out, and the torque output of each test was recorded.
When model is built by identification method, the object properties should be considered.

a) Protect the FBG from abominable construction conditions; b) Reliable bond with the asphalt; c) Simple structure and easy to process; d) Packaging structure and size is reasonable; e) Without destroying and affecting the state and distribution of the structure stress after embedded in asphalt concrete.
With comprehensively considered the above factors, a FBG sensor with simple packaged form is designed .Generally the average strain of the distance of triple largest aggregate is taken as the strain of asphalt concrete, so the length of the sensor is set at 130mm.
(1) According to the characteristics of asphalt concrete structure and the properties of construction, a fiber Bragg grating sensor is designed to monitor the dynamic response of asphalt concrete.
(3) The simulated impact test concluded that the sensor can timely respond to the instantaneous impact loading, at the same time the mechanical performance is favorable, and the sensor can meet the requirements of monitoring the dynamic response of asphalt concrete pavement.

It will affect the mechanical properties of the composite transmission and cause stress concentration.
After the material is heated, the internal structure of the material will affect the transmission and impact of material changes in the temperature field heat waves.
Reference [1] Xavier P V Maldague, Patrick O Moore. ”Nondestructive Testing Handbook Infrared and Thermal Testing”, American Society for Nondestructive Testing, 2001 [2]YANG Zhengwei, ZHANG Wei,”Numerical Simulation of Influencing Factors for Thermal Wave NDT in Composite Materials”, Juournal of System Simulation, Vol.21.No.13,Jul.2009 [3]Ksrinlvas, A O Siddiqui, J Lahiri.

This elevated porosity will affect the transport properties of concrete [1-3].
The ITZ is a weakness zone in the microstructure of concrete, but it is one of the most important factors influencing the performance of concrete.
Firstly, the sections of concrete specimens can be obtained by mechanical cutting, grinding or splitting, and the digital images of the sections are recorded in a vertical angle by a digital camera.
But the nonsmooth section would not have affected the digital image analysis.

Change of bridge’s dynamic performance reflects the change of the stiffness properties of bridge, so the bridge's dynamic property obtained as the main index to evaluate bridge’s health status, namely gained the "fingerprint" of structure.
As for the suspension supporting structure of the bridge, its suspension system (stay-cables) not only affects dynamic characteristics and mechanical characteristics of the main girder structure and itself under the interaction of alternating stress.
The main factors to influence vibration characteristics of bridge girder are the stiffness in structure itself, the mass distribution, damping etc.
Environmental temperature, cable force, traffic, vibration of cable tower and wind also affect vibration characteristics of the main girder.
T., Grigoriu M.: Random Vibration of Mechanical and Structural Systems (Prentice Hall Publications, Englewood Cliffs, New Jersey 1993)

The transition of drops of electrode metal into the weld pool significantly affects the quality of industrial products.
This property is provided by the impact of surface tension forces.
An important factor influencing the heat and mass transfer of the electrode metal during surfacing with a strip electrode is the melting feature of the strip.
Experimental data of the conducted studies have shown (see Fig. 3-4) that the dependences of the parameters of heat and mass transfer when using control impacts have an extreme character, and the thermophysical properties of the material of the electrode strip have a certain effect on the size and mass of drops.
The results of the study of droplet transfer during surfacing by strip electrodes with control impacts were processed using the applied software, which made it possible to determine the change in the average statistical indicators depending on the thermophysical properties of the electrode material (Table 3).

In this paper, a honeycomb sandwich beam and a plate are studied to verify a method of determining the equivalent properties of these structures.
The specimen is mainly applied to aircraft interior sheet, so the mechanical properties is worse than that is used as the load-carrying structure in the aviation field.
So in the vibration transmission of the beam, there’s only one volume uncertain in Gcxz, Gcyz, ρf, which affects the transmission curve(Gcxz in beam1 and Gcyz in beam2).
Therefore the category and amount of bond is an important factor in the process of honeycomb sandwich structure manufacture.
Research on Equivalent Models of the Mechanical Function for Aluminium Honeycomb Sandwich Panel.