名义应力

名义应力法（SN法）和局部应变法（εN法）的疲劳设计技术在文中得到详细说明。

Several methods of structure fatigue life prediction , including nominal stress approach ( S N approach ) and local strain approach (ε N approach ), are presented in detail .

活载产生的名义应力的增量BC段与恒载产生的名义应力OA段相比一般是很小的。

The increase in nominal stress due to live load , BC , is usually small in comparison with the dead load , OA .

S-N曲线是用名义应力法预测结构疲劳寿命的基础。

The S-N curve is the base of calculating fatigue structural life .

AZ31B镁合金；名义应力法；热点应力法；疲劳评定；

AZ31B magnesium alloy Nominal stress approach Hot spot stress approach Fatigue evaluation ;

在此基础上，利用名义应力法并根据Miner线性损伤累积理论估算了该构件的安全疲劳寿命。

On the basis of this , the part 's safe fatigue life is estimated according to normal stress method and Miner 's linear damage accumulating theory .

当量名义应力和变幅载荷下结构DFR的确定

EQUIVALENT NOMINAL STRESS AND DETERMINATION OF STRUCTURAL DFR UNDER VARIABLE AMPLITUDE Compared the actuality of the structure of th

参照名义应力法，针对卸船机拉杆和主梁的结构特点，确立了其P-S-N曲线的计算方法。

Considering the structural characteristics of tension link and girder confirmed the calculation method of P-S-N curve by nominal stress method .

然后基于线性累积损伤理论及零件p-S-N曲线，运用名义应力法得到关于疲劳寿命的统计参数。

Statistical parameters about fatigue life were got by nominal stress method , based on linear cumulative damage theory and p-s-N curve .

在统计断裂力学Weibull分布公式基础上利用名义应力给出了多尺度分级模型意义下颗粒破碎概率；

The particle crushing probability in the model is derived on the basis of the Weibull distribution formula in the frame of statistical fracture mechanics with the use of the nominal stress concept .

接头型式不同导致焊接接头局部应力集中有较大差异，因而对采用名义应力幅值表示的S-N曲线有明显影响。

In addition , the different joint geometries lead to the difference of local stress concentration of welded joints , so nominal stress S-N curve is affected evidently .

基于AAR标准中摇枕载荷谱，采用名义应力法和Miner法则对摇枕的疲劳寿命进行估算。

The fatigue life of the bolster is estimated under AAR bolster load spectrum according to the nominal stress method and the Miner principle of linear cumulative damage . 5 .

通过对单调和循环加载下中心孔缺口试样的3-D有限元数值模拟，研究了缺口多轴局部应力、应变响应及其随名义应力（幅）的变化规律；

By analyzing the local stress and strain of the notched specimen with a centre hole subjected to monotonic and cyclic loading using 3-D elasto-plastic finite element , the multiaxial mechanical responses of the notched specimen as well as their changes with the nominal stress ( amplitudes ) were investigated .

以32t-31.5m通用中轨桥式起重机为例，采用在线的名义应力法进行寿命估算。

Taking 32t-31.5m common bridge crane for example , fatigue life was estimated by online nominal stress method .

试验分析说明铝合金5083纵向角接板焊接接头名义应力和热点应力疲劳S-N曲线试验数据拟合斜率为5.62，高于国际焊接学会推荐的斜率为3.0；

The test analysis shows that the fitted slope of test data to nominal stress and hot spot stress S-N curves for aluminum 5083 welded joint with longitudinal fillet welded gusset is 5.62 , higher than 3.0 recommended by ⅱ W.

用名义应力疲劳级别FAT28，热点应力疲劳级别FAT40来进行结构设计是安全的。

Moreover , it is safer to design aluminum alloy welded joint with longitudinal fillet welded gusset with the nominal stress FAT28 and the hot spot stress FAT40 .

提出了评定带周向缺陷管道塑性失稳失效的一种新方法&名义应力比法，并详细说明该方法的优点和基本思路。

A new evaluation method named Nominal Stress Ratio Method is presented .

压杆稳定设计的名义应力法

A Nominal Stress Method for the Stability of Design of Axially Compressed Bar

基于名义应力法的港口起重机金属结构安全使用期估算

Safe Life Prediction of Port Crane Metal Structure Base on Nominal Stress Method

采用名义应力对预应力混凝土梁进行简化计算，能达到一定的精确度，适用于预应力混凝土梁的初步设计。

The accuracy of the nominal stress method is suitable for the preliminary design .

接头形式对采用名义应力幅值Δσ表示的疲劳强度有较大影响；

Fatigue life based on nominal stress range Δσ is affected by different joint geometries .

基于名义应力法的微型连接器疲劳寿命预测研究

Study on the Fatigue Life Prediction of Micro Connector Based on the Nominal Stress Method

但要求已知名义应力的概率密度分布形式，否则只是一种粗略估计。

The results are approximate unless the distribution of probability density of nominal stress was known .

通过引入名义应力法，对疲劳荷载作用下碳纤维布加固钢筋混凝土梁的疲劳寿命进行了分析。

Nominal stress method is applied for fatigue analysis of reinforced concrete beam strengthened with CFRP sheets .

含周向缺陷管道的塑性失稳失效评定的名义应力比法

Nominal Stress Ratio Method of Failure Assessment for Piping with Circumferential Surface Flaws under Plastic Collapse Failure

其次，本文讨论了结构疲劳寿命计算常用的名义应力法。

Secondly , the nominal stress method which is often used to calculate structure fatigue lives is discussed in the paper .

应用名义应力法和局部应力应变法，建立了滚圈疲劳寿命预测模型。

By applying nominal stress method and local stress-strain method , the fatigue life prediction model of rolling ring is built .

通过查阅大量相关文献得出估算高周疲劳寿命应采用名义应力法。

The nominal stress approach was used to estimate the fatigue life of tower crane , which belongs to high cycle fatigue .

根据强度分析确定危险点的应力值，采用名义应力法对镁合金车轮进行疲劳寿命预测。

Nominal stress method was been adopted to predict the fatigue life of magnesium alloy wheel by the stress of peril point .

从螺栓的实际运行寿命看，螺栓的名义应力幅计算值与实际情况相符合实际运行结果良好。

From the practical life time , the value of nominal stress corresponds with the production condition . The run is very good .

本文从压杆稳定条件出发，推导出了压杆截面设计的名义应力法。

This article on the stability condition of compressed bar and obtains from norminal stress method for the design of cross section of compressed bar .