Fatigue Prediction of Aluminum Alloys Considering Critical Plane Orientation under Complex Stress States.

Marta Kurek

doi:10.3390/ma13173877

Abstract

This publication is intended to present a new way of estimating the fatigue life of various construction materials. Carpinteri’s proposal was modified by replacing the fatigue limits ratio with the value of the normal to shear stress ratio for a given number of cycles. In this study, the proposed criterion and calculation model was verified for the selected group of aluminium alloys. The purpose of the analysis of the experimental studies was to check the effectiveness of the proposed method of estimating fatigue life under the applied bending and torsional load conditions. The results of the fatigue calculations are presented in graphical form by means of diagrams showing the comparison of design and experimental strength. Before fatigue life was calculated, the critical plane orientation according to Carpinteri’s model and the proposed model were determined. After analyzing the results of the comparison of design and experimental durability, it can be stated that the proposed fatigue life estimation algorithm gives satisfactory results for multiaxial cyclic loads.

Highlights

The approach to assessing the fatigue life of machinery and equipment components is similar in many areas of civil engineering
This paper proposes a new model to estimate the fatigue life of various structural materials, taking into account the angle of orientation of the critical plane
Fatigue life calculations were performed to verify the compatibility of the determined fatigue life, determined using the new formula for the equivalent value to the fatigue life obtained by the experiment

Summary

Introduction

The approach to assessing the fatigue life of machinery and equipment components is similar in many areas of civil engineering. The proper estimation of the fatigue life of these facilities is a very important problem of modern technology, and incorrect assessments can be the cause of disasters [1,2,3]. The phenomenon of fatigue has been a current topic of research on structural materials for nearly two hundred years, due to fatigue failure, which causes enormous material losses and an increase in the safety risk for working people every year. The proper aim of all research conducted on the phenomenon of fatigue is to design and construct safe components of structures and machines

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Discussion

Conclusion