Thermography in high cycle fatigue short‐term evaluation procedures applied to a medium carbon steel
Thermography in high cycle fatigue short‐term evaluation procedures applied to a medium carbon steel
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DOI：
10.1111/ffe.13136
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发表时间：
2020-03
影响因子：
3.7
通讯作者：
Z. Teng;Haoran Wu;C. Boller;P. Starke
中科院分区：
文献类型：
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作者：
Z. Teng;Haoran Wu;C. Boller;P. Starke
本文重点介绍了非合金中碳钢SAE 1045（德国DIN标准：C45 E）的疲劳寿命计算，采用基于能量耗散的方法，通过热成像测量进行量化。这种方法的目的是建立一个内在的耗散模型，并通过使用简化的（零维，0 D）热力学方程来预测应力控制疲劳试验的循环变形行为的特性，例如疲劳极限和S-N数据。为了研究快速评估的可能性，同时减少实验工作量，进行了一次载荷增加试验（LIT）和两次恒幅试验（CAT）。在此基础上评价的S-N数据与常规确定的S-N数据具有竞争力，如下所示。
This paper focuses on the fatigue life calculation for an unalloyed medium carbon steel SAE1045 (German DIN‐standard: C45E), by applying an energy dissipation‐based approach quantified through thermographic measurements. The purpose of this approach is to establish an intrinsic dissipation model and to predict characteristics derived from the cyclic deformation behavior of stress‐controlled fatigue tests, eg, the fatigue limit and the S‐N data by using simplified (zero‐dimensional, 0D) thermodynamic equations. In order to investigate the possibilities for a rapid evaluation while simultaneously reducing the experimental effort, one load increase test (LIT) and two constant amplitude tests (CATs) were carried out. The S‐N data evaluated on such a basis is competitive to conventionally determined S‐N data as will be shown.