Application of bi-linear log–log S–N model to strain-controlled fatigue data of aluminum alloys and its effect on life predictions

Fatemi, Ali; Plaseied, Atousa; Khosrovaneh, Abolhassan; Tanner, David A.

doi:10.1016/j.ijfatigue.2005.03.003

Cited by 93 publications

(35 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar to our results, the predictions with the modified equivalent strain range method, gave accurate correlation with the LCF experimental results, but it was not in the HCF region [11]. Also, recently linear and bi-linear stress-life models were applied to predict HCF region of various Al alloys [12]. For severe notches (VCN) fully reversed plasticity would occur, for this reason, strain control data generated under R=-1 conditions were used to predict the notch behavior.…”

Section: Fatigue Life Predictionssupporting

confidence: 81%

Notch Behavior and Fatigue Life Predictions of Discontinuously Reinforced MMCs

Uygur¹

2011

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

In this study, three notch geometries were assessed with different stress concentration factors. The severity of a notch increased with the stress concentration, hence the fatigue lives dramatically reduced due to increasing stress concentration factor. Fatigue life predictions for the notch geometries have been performed by using a critical strain life approach. It is shown that the model provides a reasonable fatigue life estimation for various notch geometries, volume fraction, and reinforcement particle size of the Al metal matrix composites. Typical crack initiation sites related with the particle clusters, large particles, and intermetallic particles. Although, crack propagation in the reinforced alloy occurred predominantly in the matrix material, SiC particles (SiC p ) played a significant role in influencing the crack path.Keywords: MMCs, Fatigue, life prediction, notch behavior W pracy, badano trzy geoemetrie karbu w powiązaniu z różnymi współczynnikami koncentracji naprężeń. Wielkość pęknięcia rosła z koncentracją naprężeń, a tym samym wytrzymałość zmęczeniowa była drastycznie obniżona ze względu na zwiększony współczynnik koncentracji naprężeń. Przewidywania trwałości zmęczeniowej dla różnych geometrii karbu zostały wykonane przy użyciu krytycznego czasu odkształcenia. Pokazano, że model umożliwia wystarczające szacowanie trwało-ści zmęczeniowej dla różnych geometrii karbu, frakcja objętości, i wielkości cząstek zbrojenia aluminiowych kompozytów metalowo-ceramicznych. Typowe miejsca inicjacji pęknięcia związane były z klastrami cząstek, dużymi cząstkami, i cząstkami intermetalików. Pomimo, że pęknięcia w kompozycie miały miejsce głównie w materiale matrycy, cząsteczki (SiC p ) odegrały znaczną rolę w kształtowaniu ścieżki pęknięcia.

show abstract

Section: Fatigue Life Predictionssupporting

confidence: 81%

Notch Behavior and Fatigue Life Predictions of Discontinuously Reinforced MMCs

Uygur¹

2011

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

show abstract

“…Xiaoshan, Guoqiu , Xiangqun , Defeng and Weihua (2009) were found The deformation of the alloy and the morphology of the dislocation substructures determine the fatigue behavior of AA6063 alloy under the same equivalent stress amplitude loading when studied the fatigue behavior under several nonproportional path loadings, which were circle, ellipse, rectangle and square paths. Fatemi, Plaseieda, Khosrovanehb and Tanner (2005) were shown that the bi-linear S-N model provides a much better representation of the data than the commonly used linear model for AA6063, AA6260 and AA6082. Torsional deformation and fatigue behavior of both solid and thin-walled tubular specimens made from as-received and heat treated 6061 aluminum alloy were studied (Marini & Ismail, 2011) and, it is conclude that the S-N curve shows that heat treated T6 alloy exhibit higher fatigue life and fatigue strength compared to the as-received alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Strain Life of Aluminum Alloy AA 6061

Abood

Saleh²,

Abdullah

2013

JMSR

View full text Add to dashboard Cite

The present work encompasses the investigation of Low Cycle Fatigue (LCF) of aluminum alloy AA6061 in three conditions, annealing (O), T4 and T651. AA6061-O has the higher value of transition fatigue life (N T ) because it has the highest ductility, while the fatigue strength exponent and fatigue ductility exponent are within the range of metallic materials. The SEM morphology for specimens at strain closer to true tensile stress show multi-crack origins with secondary cracks and large final fracture zone. The striations are very clear for O-condition.

show abstract

“…Using Equation 13, a plot of ultimate tensile strength vs. fatigue endurance limit is also provided, Figure 4a. There is somewhat scattered between ultimate tensile strength and fatigue endurance limit.…”

Section: Correlation Between Ultimate Tensile and Shearing Strengths mentioning

confidence: 99%

“…Park-Song's method developed to overcome the shortcoming of the orig- Figure 7. Experimental vs. predicted cyclic strain hardening exponent [4,[12][13][14][15][16][17]. Based on the previous discussions, Park-Song's method can give reasonable life predictions for the considered aluminum alloys.…”

Section: Cyclic Strain Hardening Exponentmentioning

confidence: 99%

Some useful approximations for wrought aluminum alloys based on monotonic tensile properties and hardness

Zhang

2018

Materialwissenschaft Werkst

View full text Add to dashboard Cite

The objective of the present paper is to derive some useful approximations for estimating the strain-controlled fatigue properties and cyclic deformation of wrought aluminum alloys from hardness and monotonic tensile properties. A variety of relationships and correlations among monotonic tensile properties, Brinell hardness, cyclic deformation and strain-controlled fatigue properties are developed for wrought aluminum alloys. A simple method is proposed for prediction of the strainlife curve requiring only ultimate tensile strength and modulus of elasticity. Prediction capability of the proposed method is evaluated for 25 kinds of wrought aluminum alloys with ultimate tensile strength between 120 MPa and 650 MPa. The proposed method provides good approximations of the strain-life curve.

show abstract

Application of bi-linear log–log S–N model to strain-controlled fatigue data of aluminum alloys and its effect on life predictions

Cited by 93 publications

References 5 publications

Notch Behavior and Fatigue Life Predictions of Discontinuously Reinforced MMCs

Notch Behavior and Fatigue Life Predictions of Discontinuously Reinforced MMCs

Effect of Heat Treatment on Strain Life of Aluminum Alloy AA 6061

Some useful approximations for wrought aluminum alloys based on monotonic tensile properties and hardness

Contact Info

Product

Resources

About