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小木虫论坛-学术科研互动平台» 学术交流区» 论文翻译 » 论文翻译求助完结子版 » 求助翻译
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zoe122208

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[求助] 求助翻译

产生这种特殊的波峰及过渡区是由于焊接过程中铝合金与钢之间的高速撞击使得两种金属发生剪切作用形成的，对于此剪切问题可以采用斯托克斯第一问题进行描述该物理过程，即空间内水平放置在液体上的静止的平板突然开始运动时，将带动平板下方的粘性流体一起运动。由于特殊波峰的高度与过渡区宽度一致，因此只要计算出粘性流体被带动的高度，即可计算出过渡区的宽度。

在磁脉冲焊接工艺中，同样的碰撞速度和搭接角度条件下，碰撞点的移动速度为定值，内、外管的碰撞速度约为10^2数量级，接头波波长为10^-2数量级，可见式中t与碰撞点移动速度成反比，过渡区的宽度与η和v有关。尽管本文将内、外管金属按流体进行分析，但是铝和铁的粘性系数还是远大于常见液体的粘性系数。研究表明，铝和铁在100GPa冲击压力下的剪切粘性系数分别为1000Pa•s和1200Pa•s。为确定参数η，取不同工艺参数条件下试样的过渡区宽度和速度进行计算，工艺参数如表所示，将各参数带入式中，可得不同试验条件下的η
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1楼2014-01-13 18:09:36
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真强必胜: 金币+1, 谢谢 2014-01-13 21:35:07
This special crest and the transition zone is due to the high-speed crash during welding between  aluminium alloys and steel  which made  shearing formed  of the two metals  and the  problem  of this physical process  can be described with Stokes' first problem.   when stationary plate which is placed on the liquid level   starts moving suddenly , will drive co-movement of viscous fluid at the bottom of the plate . Due to the special crest height is consistent with the width of the transition zone,   the width of the transition zone can be calculated by  the height of the   driven viscous fluid .
In the magnetic pulse welding process the moving speed of the  impact  point  is constant  with same impact speed and lap angle condition. The impact velocity of the outer tube is about 10 ^ 2 , wave length of the joint order of 10 ^ -2 , which means  the collision point  is inversely proportional to  the moving speed and  the width of the transitional zone is related to  η and v  .Although the  inner and outer tube metals are equal to   fluid for analysis here ,  the viscosity coefficient  of the aluminum and iron  is much larger than common viscosity liquids. Studies have shown that the shear viscosity coefficient  of  aluminum and iron in 100GPa impact pressure was 1000Pa • s and 1200Pa • s. The transition region width of the sample  and speed  under different process parameters is calculated  to determine the parameter η .  Certain η under different experimental conditions can be obtained  when  the process parameters shown in the table was taken into the equation 。
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3楼2014-01-13 21:09:55
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befair

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真强必胜: 金币+1, 谢谢 2014-01-13 21:34:55
zoe122208: 金币+100, 翻译EPI+1, ★★★★★最佳答案 2014-01-14 07:15:57
The reason why this kind of wave peaks and a transition area are resulted is due to the high speed impact, during the welding process, between the aluminum alloy and steel  which causes shear between the two metals.  For this shear problem Stokes First Theorem can be used to describe the physical process, i.e., when a stationary plate horizontally placed on the surface of a liquid starts to move, it will cause the viscous fluid below the plate to move along. As the amplitude of the special wave peaks is the same as the width of the transition area, this width can be calculated as soon as the height of fluid that is carried along is calculated.

Within the technology of welding by magnetic pulse, under the same collision speed and joint angle, the speed of movement at collision point is a constant and the speed of impact between the inner and outer pipe is of an order of magnitude of 10^2 and the wavelength of the joint of 10^-2. Hence it can be seen that in the formula, t is inversely proportional to the speed of movement at the collision point and the width of transition area is related to η and v. Although the inner and outer metal pipes are treated as fluid in this paper, the viscosity coefficients of aluminum and steel are far greater than those of the most common liquids. This study shows that the shear  viscosity coefficients  of aluminum and steel under an impact pressure of 100GPa are 1000Pa•s and 1200Pa•s respectively. In order to determine the parameter η, calculations are done using widths of the transition area and speeds under different process conditions, with process parameter being given in the table  and then η under different test conditions are obtained.
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2楼2014-01-13 20:50:28
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