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首页> 外文会议>Eighth International Fatigue Congress Vol.5, Jun 3-7, 2002, Stockholm, Sweden >PARAMETER C LIFETIME CALCULATION FOR THE HIGH CYCLE REGIME
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PARAMETER C LIFETIME CALCULATION FOR THE HIGH CYCLE REGIME

机译：高速循环的参数C寿命计算

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摘要

Most components are subjected to variable load amplitudes. Many of them are exposed up to 10~8 or even more load cycles during their utilization. Failures occur, when the applied maximum stress value of the cumulative frequency distribution is just above the fatigue limit. Lifetime predictions in the high cycle regime are still inadequate. A main reason for the inadequacy is the insufficient knowledge about the damaging mechanisms and the lack of simulation models to describe the occurring failure. None of the Miner-Rule Modifications mainly used in lifetime prediction is capable to describe all test results. A new concept for the lifetime prediction for variable amplitudes in the high cycle regime is introduced. The concept uses an proposal by Hueck for an additional Parameter C for a Miner Modification to modify the shape of the predicted fatigue lifetime curve. Based on a small number of variable amplitude tests at high stress amplitudes a prediction for high cycle regime can be made using the Parameter C-Concept.
机译：大多数组件承受可变的负载振幅。在使用过程中，它们中的许多暴露在高达10〜8个甚至更多的负载循环中。当所施加的累积频率分布的最大应力值刚好高于疲劳极限时，就会发生故障。高周期状态下的寿命预测仍然不足。不足的主要原因是对损坏机制的了解不足，并且缺乏描述发生故障的仿真模型。主要用于寿命预测的Miner-Rule修改均不能描述所有测试结果。引入了一种新的概念，用于预测高循环状态下可变振幅的寿命。该概念使用了Hueck的建议，为矿工修改附加了参数C，以修改预测疲劳寿命曲线的形状。基于在高应力振幅下进行的少量可变振幅测试，可以使用参数C概念进行高循环状态的预测。

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