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softening region
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  软化区
     This theory can predict the initiation,de-velopment and localization of the softening region in the dynamically loaded beams,with avery good agreement with the experimental observation of pipe-whip tests.
     这一理论模型能够预报软化区的萌生、发展和局部化,同管道甩动实验观测极为符合。
短句来源
     In this paper after having reviewed the basic concepts and studied the modeling for instability analysis of single layer reticulated shells,the authors present some concepts of softening region in a structure and critical stress.
     文中在回顾了基本概念的基础上提出了软化区、临界应力的概念和基于机构位移分析的屈曲路线跟踪技术,并给出了软化区的判断原则和临界应力的定义以及平衡路线、屈曲路线跟踪过程和技术。
短句来源
  “softening region”译为未确定词的双语例句
     The cause produced above questions are unreasonable graininess composition of Brazil and india ore, unreasonable graininess shaping and large softening region in the process of sintering.
     其原因是巴西矿和印度矿粒度组成差,颗粒形成不合理及软化温度区间大所致。
短句来源
     The tensile strength failure criterion is used,and stress-displacement model is adopted to alleviate the sensitivity on mesh size in the softening region.
     混凝土细观结构的破坏由最大拉应力准则判别,对于软化段,采用了应力-张开位移模型以缓解计算结果的网格依赖性.
短句来源
  相似匹配句对
     The mountainous- region in the .
     湖南省湘西山地是我国南方山地的一个重要类型。
短句来源
     shock region.
     三个区域对应了时域的激波形成。
短句来源
     The void nucleation, growth, hydrostatic tension and material softening are discussed in the neck region.
     讨论了颈缩区空穴形核、扩张、静水应力以及材料软化的问题,初步揭示了空穴的演化过程和材料的破坏机理。
短句来源
     The temperature width of steady flow region independent on the structure of feedstock and softening point.
     平稳流动区域的宽窄同原料的原始结构及软化点有关。
短句来源
     Dusting in Jute Softening
     黄麻软麻除尘
短句来源
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  softening region
The flow-stress curves are found to include both a work-hardening region and a work-softening region.
      
In both reinforced and unreinforced materials, the naturally aged conditions were cyclically unstable, exhibiting an initial hardening behavior followed by an extended region of cyclic stability and ultimately a softening region.
      
A Ludwig equation was modified to model the stress-strain behavior at a reference strain rate, which included elastic deformation, a yield-like peak, and a strain-softening region.
      
A softening moment-curvature relation is assumed for the beam and a closed form solution is obtained for a special kind of load, which shows that there exists a softening region in the beam and this region propagates along the beam.
      
In other instances, the studs could go into tension membrane after a well-defined softening region after the yield-buckling is achieved.
      
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Due to thstrain-softening of materials or due to the cross-sectional distortion of thin-walled beams in their large deflection,the moment-curvature relation of beams may display a hardening-softening characteristic.The recent work carried out by a research groupin Peking University has confirmed that when a semi-infinite beam with softening property is subjected to a suddenly applid constant velocity at its tip,softening may develop into asegment of finite length and travel along the beam. Meanwhile,in order...

Due to thstrain-softening of materials or due to the cross-sectional distortion of thin-walled beams in their large deflection,the moment-curvature relation of beams may display a hardening-softening characteristic.The recent work carried out by a research groupin Peking University has confirmed that when a semi-infinite beam with softening property is subjected to a suddenly applid constant velocity at its tip,softening may develop into asegment of finite length and travel along the beam. Meanwhile,in order to study pipe-whipphenomenon in nuclear plants,a research group in UMIST,UK,has made a thorough studyon the dvnamic behaviour of beams of finite length with hardening-softening characteris-tic. A theoretical model has been proposed to incorporate an elastic-hardening-softeningmoment-curvature relat ion into a large deflect ion dynamic analysis,and a correspondingfinite-difference programme has been developed.This theory can predict the initiation,de-velopment and localization of the softening region in the dynamically loaded beams,with avery good agreement with the experimental observation of pipe-whip tests.

由于材料的应变软化,或是由于薄壁梁在挠曲变形时的截面畸变,梁的弯矩一曲率关系可能呈现先强化后软化的性态。近几年来北京大学一个研究组的工作证实,具有软化特性的半无限长梁在自由端受常速度冲击时,软化可能发展为一个有限长的区段,并在梁内移动,同时,英国UMIST的一个研究组以核电站中的管道甩动问题为工程背景,集中研究了具有软化特性的有限长梁的动力行为。提出了计及弹性、强化、软化和梁的几何大变形的理论模型,并发展了相应的有限差分程序。这一理论模型能够预报软化区的萌生、发展和局部化,同管道甩动实验观测极为符合。

This paper has done study on sintering character of coarse ore powder of Brazil and india. The result expresses that the sintering character of two ores is poor,when total quantity of two ores is over 30% of complex mixture ratio the productivity of sintering ore is decreased, the powder content of sintering ores is increased , and the temperature of main chimney flue is lowered. The cause produced above questions are unreasonable graininess composition of Brazil and india ore, unreasonable graininess shaping...

This paper has done study on sintering character of coarse ore powder of Brazil and india. The result expresses that the sintering character of two ores is poor,when total quantity of two ores is over 30% of complex mixture ratio the productivity of sintering ore is decreased, the powder content of sintering ores is increased , and the temperature of main chimney flue is lowered. The cause produced above questions are unreasonable graininess composition of Brazil and india ore, unreasonable graininess shaping and large softening region in the process of sintering.

对巴西和印度粗矿粉的烧结性能进行了研究,结果表明,这两种矿烧结性能较差,当它们的总和超过综合料配比的30%时,烧结矿产量降低,含粉率升高,大烟道温度下降。其原因是巴西矿和印度矿粒度组成差,颗粒形成不合理及软化温度区间大所致。

Rock permeability problem is of great importance for hydraulic enginerring, petroleum developing and coal mining engineering under a water body. Therefore, many researchers in home and abroad had carried out a number of permeability testing for porous and porous fractured rocks such as sandstone and granite. Nevertheless, until now any reports concerning test results on the permeability of carbonate rock for the complete stress strain path have not been seen in the literature because karstification causes...

Rock permeability problem is of great importance for hydraulic enginerring, petroleum developing and coal mining engineering under a water body. Therefore, many researchers in home and abroad had carried out a number of permeability testing for porous and porous fractured rocks such as sandstone and granite. Nevertheless, until now any reports concerning test results on the permeability of carbonate rock for the complete stress strain path have not been seen in the literature because karstification causes its anisotropic inhomogeneity increasing. Using Electro Hydraulic Servocontrolled Rock Mechanics Testing System produced by MTS Company and the transient method, the author had tested the permeability of 18 dolomite core samples collected from the Wumishan Foramtion in the Renqiu Oilfield.These results showed that their permeability was mainly controlled by feature of karstific void except the stress state.Based on void feature under SEM and permeability curves in the complete strese strain path,the dolomite of Renqiu Oilfield can be divided into four following types:(1)Mdeium sparite algal dolomite with corrosive cavern, initial permeability is from 143.10×10 -7 darcy to 206.00×10 -7 darcy, permeability peak is up before the stress peak, and peak stress is from 45.0MPa to 55.3MPa; (2)Siliceous brecia dolomite with corrosive cavern, initial permeability can up to 690.00×10 -7 darcy becaues of development of karst void, post peak permeability can continously increase and peak stress is 35.8MPa;(3)Fissured and Micro fisssured dolomite, initial permeability varies from 1.48×10 -7 darcy to 23.4×10 -7 darcy because of difference of their connection and fill; and peak stress varies form 40.8MPa to 58.2MPa;(4)Compacted argillaceous and siliceous dolomite, initial permeabity is almost zero, peak stress can up to 107.5Mpa. Permeability curves of dolomite in the complete stress strain path have many types because of impact of inhomogeneity, and can not be obviously divided into elastic, elastic plastic and strain-softening region such as permeability curves of sandstone. Using 9310 Pore Size produced by Micrometrities Company,the author also studied the change of pore and micro fissure of dolomite samples duriag testing process, the results shown that pore and micro fissure in sample obviously increase, porosity and pore throat become great.Comparing with the curve of mecury injection before testing, peak of mecury injection in the region that pore diameter is more than 100μm has risen greatly. The above mentioned testing results can provide a theoretical base for further development of the Renqiu Oilfield.

运用 8 1 5.0 2型电液伺服岩石力学试验系统对任丘油田雾迷山组 1 8块白云岩岩芯的渗透性进行了测试。结果表明 ,溶蚀孔洞型中 -亮晶藻屑白云岩和角砾岩 ,初始和峰值渗透率均较高 (分别为 1 43.1 0× 1 0 - 7— 2 0 6.0 0× 1 0 - 7Darcy和 386.80× 1 0 - 7— 790 .0 0× 1 0 - 7Darcy) ,而且破坏强度较低 (35.8MPa— 55.3MPa) ;裂隙型白云岩初始渗透率为 1 .48× 1 0 - 7— 2 3.40× 1 0 - 7Darcy,峰值渗透率 32 .1 3× 1 0 - 7— 2 0 2 .1 0× 1 0 - 7Darcy;泥质白云岩和硅质白云岩 ,岩性致密 ,初始渗透率几乎为零 ,峰值渗透率 66.0 0× 1 0 - 7— 1 52 .2 0× 1 0 - 7Darcy,而且其破坏强度最高可达 1 0 7.50 MPa。同时运用 Amray 1 0 0 0 B型电子扫描显微镜和 931 0型微孔结构分析仪研究了空隙发育对渗透性的影响

 
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