Damaged Prediction Method for A Mechanical Structure on Random Load

Sakai M and Yukinao AM

Published on: 2025-05-11

Abstract

In this paper, a simplified computational model is utilized to derive a straightforward mathematical formula that allows for a rapid estimation of the stress concentration fac-tor in regions susceptible to fatigue failure. This formula serves as a valuable tool for engineers and researchers by providing a quick and efficient means of assessing stress concentration without the need for complex numerical simulations or extensive exper-imental testing. Additionally, the derived formula facilitates the development of a novel relationship that links the product of stress and strain concentration factors. This relationship provides deeper insights into the mechanical behavior of materials under cyclic loading conditions, offering a more comprehensive understanding of how stress and strain concentrations interact in fatigue-prone regions. An important finding of this study is that the magnitude of the product of stress and strain concentration fac-tors is not constant but varies depending on the amplitude of the applied stress level. This dependency highlights the need for careful consideration of stress amplitudes in fatigue analysis and component design. The insights gained from this research con-tribute to the advancement of predictive models for fatigue failure, ultimately enhanc-ing the reliability and durability of structural components subjected to repeated load-ing conditions.