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flow of debris
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     in traffic flow.
     交通事故导致的交通堵塞等等。
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     On the Analysis of Cash Flow
     浅谈现金流量分析
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     ON THE DEBRIS FLOW SCIENCE
     论泥石流学
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     Sensitivity of Flow Reliability
     网络流可靠度的灵敏度及其应用
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  flow of debris
The size of the culvert obstructed the flow of debris.
      
Barrier A low dam or rack built to control the flow of debris.
      


Fretting damage occurs on contact surfaces of components which are clamped together and are subjected to tangential oscillating movement with small amplitude. Usually, the normal force is larger and the cyclic relative sliding motion is smaller, so that the flow of debris away from its place or origin in the contact interface is restricted. The formation of debris in a fretting contact surface is a sign that fretting damage has occurred.Fretting damage is often used to denote fretting corrosion,...

Fretting damage occurs on contact surfaces of components which are clamped together and are subjected to tangential oscillating movement with small amplitude. Usually, the normal force is larger and the cyclic relative sliding motion is smaller, so that the flow of debris away from its place or origin in the contact interface is restricted. The formation of debris in a fretting contact surface is a sign that fretting damage has occurred.Fretting damage is often used to denote fretting corrosion, fretting wear, fretting fatigue.Fretting can not only cause a deterioration of surface quality, but also initiate fatigue cracks which may drastically lower the fatigue strength of some materials. Experimental results have shown in this paper; the fretting fatigue limits for 0.45C steel and high strength aluminium alloy specimens were reduced by approximately 30~55%, compared to non-fretted specimens at 107 cycles. In the most severe case, the fatigue strength was reduced by 80% or so.Fretting damage arises in any engineering device, as long as a source of vibration is present. In laboratory tests on aircraft components, it was found that about 90% of all failures occured at points where fretting existed. In aircrafts and gas turbine engines, fretting fatigue is increasingly being recognized as a major source of failure.This paper describes the general situation of fretting damage in aircraft industry and illustrates the typical characteristics of fretting damage. In other countries, there are many universities and scientific research groups who are undertaking this research work. We are continuously engaged in this research work, it will bring significant influences on aircraft reliability design.

本文介绍飞机及发动机中出现的微动损伤概况。飞机构件实验室实验中约有90%的破坏均发生在有微动环境处,微动作用使材料的疲劳强度降低了30~80%。本文还介绍了微动损伤的典型特征。

Xikou landslide located in the inverted limb of Baoding anticline of Huayong anticlinoria. The strata is falling home,and the upper is hard, the lower is soft. It is beside the fault. The hard is dolomite and the soft is mudstone. There are fault calcibreccia in the landslide,and the calci-breccia are coherent mass, intact rocks only. In the paper, a playback of the deformation and motion of Xikou Landslide has been maken with discrete analog method. The result of inversion shows that the front mass of landslide...

Xikou landslide located in the inverted limb of Baoding anticline of Huayong anticlinoria. The strata is falling home,and the upper is hard, the lower is soft. It is beside the fault. The hard is dolomite and the soft is mudstone. There are fault calcibreccia in the landslide,and the calci-breccia are coherent mass, intact rocks only. In the paper, a playback of the deformation and motion of Xikou Landslide has been maken with discrete analog method. The result of inversion shows that the front mass of landslide is the biggest deformation early. The mass is pushed by upper sliding mass,and there are some displace and upward deformation. They are flow of debris and clast in motion and resting process after landslide disintegrate.

通过离散元分析拟合了溪口滑坡碎屑流的运动过程和主要特征,认为滑坡解体后是以碎屑流方式完成运移和停积过程。

 
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