疲劳曲线

Marc this paper carried out a finite element numerical simulation on the forming process of cold extruding for the starlike sleeve of constant speed cardan joint of car. The interrelated technological problems of numerical simulation were discussed in detail, the variation curve of extruding force during the course of loading, the cloud chart, which varies along with time, of temperature field distribution of workpiece, the equivalent plastic strain cloud chart of workpiece and the stress distribution cloud chart of diem inner ring were obtained thus explained fairly nice the reason of fatigue damage of dies.

Marc对轿车等速万向节星形套冷挤压成型过程进行了有限元数值模拟，详细讨论了有关数值模拟技术问题，得出了挤压力在加载过程中的变化曲线、工件随时间变化的温度场分布云图、工件等效塑性应变云图及模具内圈的应力分布云图，较好地解释了模具疲劳破坏的原因。

Methods: The action potential of sciatic trunk and contract curve of gastrocnemius muscle of hoptoad and mouse were recorded, and the time of fatigue in nerve centre, neuromuscular junction and muscle were measured.

分别记录蟾蜍和小鼠坐骨神经干动作电位和腓肠肌收缩曲线，测定中枢、神经-肌接头和肌疲劳的时间。

A method for quickly determining the crack growth curve of offshore steel platform s is presented in the paper.

提出了一种确定海洋平台钢裂纹扩展曲线的快速方法，该方法可以综合利用以往的经验数据和当前试验数据确定表面疲劳裂纹扩展速率曲线。

This study consists of three parts. Firstly the equivalently accelerative corrosive environment is determined through the analysis of statistic data of corrosion environment. Secondly the fatigue test is carried out under the constant amplitude cyclic loading for the specimens which are exposed in the corrosive environment for equivalent calendar time of zero year, 3 years, 8 years and 13 years. Four S-N curves with different corrosive time are obtained based on the fatigue experiment. Finally the regression method of S-N curves for experimental data is researched and a weighted least square fit is put forward in which the weigh of a group of test data is inversely proportional to the length of the confidence interval.

进行了以下几个方面的工作：(1)通过实测、统计、分析得到了当量加速环境谱；(2)完成了在当量加速环境谱下预腐蚀日历年限0年、3年、8年和13年的腐蚀试验，并进行了成组常幅疲劳试验，得到了不同预腐蚀年限下的S-N曲线；(3)进行预腐蚀后的S-N曲线的数据拟合方法的研究，提出了考虑置信区间长度影响的加权最小二乘法。

Starting with the need to make effective use of limited resources and to conserve the global environment, challenges to be addressed are numerous. Taisei Kogyo is highly acclaimed by society as "Taisei Kogyo the Technical Company" by meeting the needs of the industry by using its "product appeal" and "expertise" for meeting a wide range of applications ranging from large plants to amusement facilities to production lines for information technology equipment. The company does so by using its accumulated know-how and experiences in an attempt to contribute to society as a manufacturer specializing in oil filters and coolers. With our new management policy expressed in the form of the slogan "Speed, Smile, and Communication," Taisei Kogyo aims to produce global products linked closely to the market needs under its production policy "Do our best for all customers" by having all its employees work as one with a customer focus.

产品系列： SFN系列 SFT系列 SFG系列 VN系列 ISH系列 LND系列 LN系列 351系列 352系列 UL系列 UM系列 UH系列 SH系列 GF系列 GC系列 4201系列 TL系列 LCN系列 AK系列 CFK系列 TRF系列 CS系列 CF系列 107系列 AP系列 FA系列 FU系列日本大生是日本重工业集团公司，日本大生的过滤器应用在工业的各个领域，优良的品质和广泛的互换性使日本大生成为许多企业的首选品牌过滤器●压力过滤器●回油过滤器●吸油过滤器●空气过滤器及污染显示器滤芯过滤精度：1μm～100μm过滤面积：420cm2～316800cm2过滤比：β值大于216材质：玻璃纤维、纸质纤维、金属织网滤芯符合国际标准● ISO2941 滤芯抗破裂试验● ISO2942 滤芯结构完整性检验● ISO2943 滤材与液体相客性检验● ISO3723 滤芯额定轴向载荷检验● ISO3724 流量疲劳特性曲线● ISO3968 流量特性曲线● ISO4572 多次通过试验

From recording curves and experimental data treated by linear approximation of single specimen, it was shown that the test was successful and the measuring method can be used as reference for fatigue tests of the real components.

由记录曲线以及对测定数据作简单的单试样法线性近似处理的结果表明，试验是成功的。本文的测试方法也可用於实际构件疲劳试验。

Test results show that the equivalent strain method exhibits a higher life assessment precision as compared to that by linear damage summation. The critical damage formula for equivalent strain can quite well predict the actual damage incurred and the equivalent strain-life curve with hardness modification fundamentally conforms with the pure fatigue strain-life curve.

试验结果表明，在预测寿命时等效应变法比线性累计损伤法具有更高的精度，等效应变的应力下临界损伤公式能够很好地预测实际损伤，考虑硬度修正的等效应变-寿命曲线和纯疲劳应变-寿命曲线基本一致。

Based on the experiment and theory analysis, we give out the fatigue reliability curve of these two kinds of materials to provide bases for engineering.

通过上述试验研究与理论分析，给出 WH530和WH610D2两种钢材的疲劳性能参数，并给出这两种钢材的疲劳可靠性曲线，为工程应用提供依据。

According to the test data, the fatigue strength time-varying model with the deterioration of fatigue strength coefficient in S-N curve was put forward.

根据试验数据，提出S-N曲线中疲劳强度系数下降的疲劳强度时变模型。

On the basis of a reliable finite element model, the load spectrum as specified in AAR standard and the S-N Curve database for welding joints, regarding the new type of heavy haul open top wagon as the analysis object, fatigue life prediction is cond

基于可靠的有限元数值仿真模型，以及美国AAR标准中的载荷谱、焊接接头的S-N曲线数据库，以重载新型敞车为应用对象，在设计阶段对其进行了疲劳寿命预测，预测结果表明该车确实存在疲劳寿命薄弱部位。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。