Fatigue properties are of fundamental importance and extremely time consuming to be assessed. The aim of this research activity is to apply the Thermographic Method (TM) and the Static Thermographic Method (STM) during fatigue and tensile tests to correlate the temperature trend to the fatigue properties of an S355 steel. The material was retrieved from an in‐service port crane. Traditional fatigue tests were performed in order to evaluate the S‐N curve with a scatter band. Step load tests were carried out deriving the fatigue limit and the Energy Parameter of the material. Static tensile tests were performed to obtain the stress at which the temperature trend deviates from the thermoelastic behavior. The fatigue properties obtained by means of the energetic methods were compared to the traditional ones showing a good agreement.

中文翻译：

---

船用结构钢的疲劳评估以及热成像法和静态热成像法的比较

疲劳特性至关重要，评估起来非常耗时。这项研究活动的目的是在疲劳和拉伸试验期间应用热成像方法（TM）和静态热成像方法（STM），以将温度趋势与S355钢的疲劳特性相关联。该材料是从在役港口起重机中取回的。为了评估带有散射带的SN曲线，进行了传统的疲劳测试。进行了阶跃载荷测试，得出了材料的疲劳极限和能量参数。进行静态拉伸试验以获得应力，在该应力下温度趋势偏离热弹性行为。通过能量方法获得的疲劳性能与显示出良好一致性的传统方法进行了比较。