关于快速频率变化下疲劳断裂的特性

On the Characteristics of Fatigue Fracture with Rapid Frequency Change.

作者信息

Amooie Mohammad A, Lijesh K P, Mahmoudi Ali, Azizian-Farsani Elaheh, Khonsari Michael M

机构信息

Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.

出版信息

Entropy (Basel). 2023 May 24;25(6):840. doi: 10.3390/e25060840.

DOI:10.3390/e25060840

PMID:37372184

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10297126/

Abstract

The effect of sudden variations in working modes and fatigue behavior of CS 1018 is studied. A general model based on the framework of the fracture fatigue entropy (FFE) concept is developed to capture such changes. Fully reversed bending tests are performed on flat dog bone specimens with a series of variable frequency tests without turning the machine off to simulate fluctuating working conditions. The results are then post-processed and analyzed to assess how fatigue life changes when a component is subjected to sudden changes in multiple frequencies. It is demonstrated that regardless of the frequency changes, FFE remains constant and stays within a narrow band range, similar to that of a constant frequency.

摘要

研究了CS 1018工作模式的突然变化及其疲劳行为。基于断裂疲劳熵（FFE）概念框架开发了一个通用模型来捕捉此类变化。对扁平狗骨形试样进行完全反向弯曲试验，进行一系列不关机的变频试验以模拟波动的工作条件。然后对结果进行后处理和分析，以评估当部件受到多个频率的突然变化时疲劳寿命如何变化。结果表明，无论频率如何变化，FFE都保持恒定，并保持在一个窄带范围内，类似于恒定频率的情况。