Comparative Study of Fatigue Damage Models Using Different Number of Classes Combined with the Rainflow Method

Abstract

Fatigue damage increases with applied load cycles in a cumulative manner. Fatigue damage models play a key role in life prediction of components and structures subjected to random loading. The aim of this paper is the examination of the performance of the “Damaged Stress Model”, proposed and validated, against other fatigue models under random loading before and after reconstruction of the load histories. To achieve this objective, some linear and nonlinear models proposed for fatigue life estimation and a batch of specimens made of 6082T6 aluminum alloy is subjected to random loading. The damage was cumulated by Miner’s rule, Damaged Stress Model (DSM), Henry model and Unified Theory (UT) and random cycles were counted with a rain-flow algorithm. Experimental data on high-cycle fatigue by complex loading histories with different mean and amplitude stress values are analyzed for life calculation and model predictions are compared.

Numerical study of fatigue damage under random loading using rainflow cycle counting

“…However, it should be noted that the Miner rule is often an inappropriate oversimplification. Depending on the load history, the sum of damage may be greater or less than one (Shi et al, 2016), (Zengah et al, 2013). The counting of stress cycles is an important step which must makes possible to filter the information essential for the study of fatigue damage.…”

“…The fatigue lifetime prediction in specimens made of aluminium alloy subjected to random Numerical study of fatigue damage 149 loading is studied by Kim et al (2006), It may be successfully applied to predict fatigue crack growth under random loading (Correia et al, 2020). Zengah et al (Zengah et al (2013) have studied fatigue life prediction by the rain-flow cycle counting, and concluded a production of good results for random histories. Furthermore, new fatigue models and new cycle counting systems are expressed by Calder on et al (Calder on-Ur ıszar-Aldaca et al, 2020), taking into account the effects of average stresses on the fatigue life.…”

Numerical study of fatigue damage under random loading using Rainflow cycle counting

“…However, it should be noted that the Miner rule is often an inappropriate oversimplification. Depending on the load history, the sum of damage may be greater or less than one (Shi et al , 2016; Zengah et al , 2013).…”

“…The fatigue lifetime prediction in specimens made of aluminum alloy subjected to random loading is studied by Kim et al (2006), It may be successfully applied to predict fatigue crack growth under random loading. Zengah et al (2013) have studied fatigue life prediction by the rain-flow cycle counting and concluded a production of good results for random histories. Furthermore, new fatigue models and new cycle counting systems are expressed by Calder on-Ur ıszar- Aldaca et al (2020), taking into account the effects of average stresses on fatigue life.…”

Effects of Geometry Design Parameters on the Fatigue Failure of a Drive Axle Housing using Finite Element Analysis

“…To study the vertical fatigue of the drive axle housing, authors in [14] proposed a seven degree of freedom dynamic model to predict fatigue failure under dynamic load and presented an optimization scheme based on this. Furthermore, numerous studies have examined the effects of geometric design parameters on the structural failure due to fatigue [15][16][17][18]. The abovementioned research was mainly aimed at examining the influence of various factors on the service life of the drive axle housing, such as driving conditions, vehicle load, material properties, and axle housing manufacturing technology.…”