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cyclic ratio
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  循环比
     An experimental stUdy on axial comressive fatigue action of stal fibre reinforced conerete under high-low two level variable-amplitude loading is intiduced in this paper. The cyclic ratio of high stress level is a variable parameter. It is shown that if the cyclic ratio of high stress level is less than the critica value, then the fatigue cumulative damag sum will be greater than 1.0.
     本文以高应力循环比为变参数,通过试验研究了先高后低两级变幅载荷作用下钢纤维混凝土轴向压缩疲劳行为.结果表明:当高应力循环次数低于某临界值时,高-低两级应力下的疲劳累积损伤和将大于1.0.
短句来源
  “cyclic ratio”译为未确定词的双语例句
     (2) The cyclic ratio for fatigue crack initiation of SUS 304 is much smaller than that of SUS 304N.
     (2)SUS 304中疲劳微裂纹萌生的循环次数比远小于SUS 304N.
短句来源
     The crystallographic orientation, mean stress, environmental temperature, cyclic frequency and cyclic ratio of stress are main factors to affect creep fatigue life of single crystal Nickel based superalloys.
     晶体取向、平均应力、环境温度、循环频率、循环应力比是影响单晶合金蠕变—疲劳寿命的主要因素。
短句来源
     A new fatigue damage parameter is proposed, which is described by the nonlinear relationship between the natural frequency of specimen and its cyclic ratio. On the basis of continuum fatigue damage theory, a nonlinear fatigue damage evolution model is developed.
     提出了一个由固有频率相对变化来描述的疲劳损伤参量,并利用疲劳损伤理论,建立了非线性疲劳损伤演化模型.
短句来源
     A new model is presented for characterizing the propagation of long fatigue crack based on the analysis of test data of LZ50 carbon steel. The cracking threshold,fracture roughness and cyclic ratio are incorporated in the model.
     基于LZ50车轴裂纹扩展数据分析,提出描述长裂纹扩展的新模型。
短句来源
  相似匹配句对
     Ratio (H.R.)
     Ratio .
短句来源
     The Inverse of Difference of Equality and Ratio of Equality g-Cyclic Matrix
     等差、等比g-循环矩阵的逆
短句来源
     D—CYCLIC CRAPHS
     D—Cyclic图
短句来源
     The nutrients ratio of N?
     N、P、K的比例为1∶0.06∶0.44。
短句来源
     Improved Analysis of Ratio of Hydrogen to Nitrogen in Synthetic Cyclic Gas
     合成循环气氢氮比分析方法改进试验
短句来源
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  cyclic ratio
Power component losses are studied according to the cyclic ratio and to operating frequency and an extraction method of the different terms of these losses, using calorimetric measurements, is presented.
      
The control circuit permits variation of the frequency, the cyclic ratio, and the amount of the gate driving-voltage.
      


The fatigue tests of smooth specimens and specimens with a central hole under constant and variable amplitude loadings are presented. The material is LY12-CZ aluminum alloy. Taylar and Freudenthal program block spectrums are adopted for variable amplitude loading. Miner's rule is verified by the tests. The statistical analysis of fatigue life and cumulative cyclic ratio is completed.It is found from the tests:(1) The average Rvalue of equals 0.96 for Taylar programblock spectrum and 1.20 for Freudenthal...

The fatigue tests of smooth specimens and specimens with a central hole under constant and variable amplitude loadings are presented. The material is LY12-CZ aluminum alloy. Taylar and Freudenthal program block spectrums are adopted for variable amplitude loading. Miner's rule is verified by the tests. The statistical analysis of fatigue life and cumulative cyclic ratio is completed.It is found from the tests:(1) The average Rvalue of equals 0.96 for Taylar programblock spectrum and 1.20 for Freudenthal one. Miner's rule is not too different from test data.(2) The kind of the spectrum has an effect on the value of a due to the effect of residual stress.(3) Fatigue life in the constant amplitude tests under high stress is submitted to log-normal distribution and to weibull distribution under low stress.(4) The dispersal of a is submitted to weibull distribution. As a result, the minimum value α0 or probability value αp can be used to estimate the safe life.

本文通过对LY12-CZ铝合金板材光滑试件和中心孔试件的常幅加载和变幅加载疲劳试验,对Miner累积损伤理论进行了试验验证,并对累积周比的分散性作了统计分析,发现累积周比的分散性服从Weibull分布,因此本文提出以最小累积周比值或以与一定存活率相应的累积周比值进行安全寿命估计的观点。

An experimental stUdy on axial comressive fatigue action of stal fibre reinforced conerete under high-low two level variable-amplitude loading is intiduced in this paper. The cyclic ratio of high stress level is a variable parameter. It is shown that if the cyclic ratio of high stress level is less than the critica value, then the fatigue cumulative damag sum will be greater than 1.0.

本文以高应力循环比为变参数,通过试验研究了先高后低两级变幅载荷作用下钢纤维混凝土轴向压缩疲劳行为.结果表明:当高应力循环次数低于某临界值时,高-低两级应力下的疲劳累积损伤和将大于1.0.

The composition,structure and cyclic ratio of diallyl dibenzoxazine (DADBOZ) prepared by suspension method were characterized by FTIR and 1H_NMR.A combination of DTA,FTIR was used to investigate the curing reaction of DADBOZ precursor at different conditions.The DADBOZ precursor is composed of two kinds of reactive functional groups:one is benzoxazine ring and another is allyl group,which can be cured through ring opening polymerization or addition polymerization at different situation,Therefore,different...

The composition,structure and cyclic ratio of diallyl dibenzoxazine (DADBOZ) prepared by suspension method were characterized by FTIR and 1H_NMR.A combination of DTA,FTIR was used to investigate the curing reaction of DADBOZ precursor at different conditions.The DADBOZ precursor is composed of two kinds of reactive functional groups:one is benzoxazine ring and another is allyl group,which can be cured through ring opening polymerization or addition polymerization at different situation,Therefore,different polymer structures can be obtained.

苯并嗪化合物是以酚类化合物、胺类化合物和甲醛为原料合成的六元杂环.在适当条件下能发生开环聚合反应,生成类似于酚醛树脂结构的材料,固化过程无低分子挥发成份放出,因而作为酚醛树脂高性能化的新途径,日益受到人们的重视并得到了应用[1~3].苯并嗪化合物...

 
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