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线性累积损伤法则     
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  linear damage rule
     The linear damage rule was applied to predict the life of cc type cycle that contains both tensile creep and compressive creep.
     对同时包含拉/压蠕变的循环,采用线性累积损伤法则预测其寿命。
短句来源
  linear cumulative damage rule
     For creep-fatigue life prediction under condition of the tension-tensile stress inthe past,in the most case,the Linear Cumulative Damage Rule was adopted.
     拉-拉应力条件下蠕变疲劳寿命预测,过去,在大多数情况下,采用线性累积损伤法则
短句来源
  linear damage cumulation rule
     The model for the predictions assumes that the fatigue crack initiation period(N I) is the number of cycles for the initiation of a fatigue crack and its early growth and coalescence into a dominant fatigue crack. N I is estimated using strain-controlled fatigue data and the Palmgren-Miner linear damage cumulation rule through Knowledge of the local stress and strain response at the tip of the notch.
     该模型把疲劳裂纹起始寿命看成是疲劳裂纹萌生、早期生成并聚合成主疲劳裂纹的循环次数,利用应变控制疲劳数据和Palmgren_Miner 线性累积损伤法则以及缺口尖端局部应力应变响应知识计算的。
短句来源
  linear fatigue damage accumulation rule
     Based on the Palmgren Miner linear fatigue damage accumulation rule, a safety life estimate method is developed.
     提出了一种基于 Palmgren Miner 线性累积损伤法则的玻璃钢叶片安全寿命估计方法。
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      linear damage rule
    (c) Application of a linear damage rule individually to crack initiation and crack propagation.
          
    (c) Application of a linear damage rule individually to crack initiation and crack propagation.
          
    Practical implementation of the double linear damage rule and damage curve approach for treating cumulative fatigue damage
          
    Simple procedures are presented for treating cumulative fatigue damage under complex loading history using either the Damage Curve concept or the Double Linear Damage Rule.
          
    For the Double Linear Damage Rule, analytical expressions are provided for determining the two phases of life.
          
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      linear cumulative damage rule
    In the case of variable stresses, the range-pair mainly dominates the occurrence of the slip bands, and Miner's linear cumulative damage rule holds for the accumulation of the fatigue damage for the slip-band initiation.
          


    For creep-fatigue life prediction under condition of the tension-tensile stress inthe past,in the most case,the Linear Cumulative Damage Rule was adopted.However,a new me-thod was advaucecl in this paper,namely,Numerical Computational Appraoch of Strain EnergyPartitioning(SEP).The computing results shown that the numerical computational appraoch ofSEP has prevailed over other prediction method mentioned in the present paper.

    拉-拉应力条件下蠕变疲劳寿命预测,过去,在大多数情况下,采用线性累积损伤法则。然而,本文提出一种新的方法即应变能区分法(SEP)的数值计算方法,计算结果显示出,SEP 的数值法优于文中叙述的其他预测方法。

    By use of Monte-Carlo simulation and Hasofer and Linb's reliability index method and with the cumulative damage approach and the fracture mcchanics ap- proach. wc have analyzcd and calculard the fatigue failure probahility The maximum allowable stress of differrent safety index are obtained.

    采用线性累积损伤法则与线弹性断裂力学研究途径对近海结构管状焊接接头疲劳失效概率进行了分析与计算。还得到对应于不同安全性指标下的最大允许用应力。

    method of reliability computing for structural fatigue life (SFL) is developed. The formulae for computing the statistical Parameters of the SFL under multiple loads are first derived based on the existed experimental results and Miner's linear cnmulative damage theory. In these formulae the variation coefficients of the heat treatment of material, the measure of the structure and the external load amplitude Peak are considered. Then the safety margin equation of the system of the SPL are Presented. The reliability...

    method of reliability computing for structural fatigue life (SFL) is developed. The formulae for computing the statistical Parameters of the SFL under multiple loads are first derived based on the existed experimental results and Miner's linear cnmulative damage theory. In these formulae the variation coefficients of the heat treatment of material, the measure of the structure and the external load amplitude Peak are considered. Then the safety margin equation of the system of the SPL are Presented. The reliability of the system is computed according to the safety margin equations and the statistics Parameters of the SPL. The illustrative example is utilized to explain the Practical application of this method, and the efficiency of this method is shown by the computing results.

    基于已有的实验结果,应用Miner线性累积损伤法则推导了在多级载荷作用下,疲劳寿命统计参数的精确计算公式,考虑了材料热处理、结构尺寸以及外载荷的分散性对结构疲劳寿命统计参数的影响,所推导公式计算结果与实验吻合较好。给出了结构连接件在复合应力作用下多模式疲劳寿命的线性安全边界方程,因方程中所包含的变量被转化成了正态分布的变量,故所算得的每个模式的可靠度是精确的。对结构体系的破坏概率随寿命相关系数变化的规律亦进行了研究。

     
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