RESEARCH ON FATIGUE PROPERTIES OF 7075-T651 ALUMINUM ALLOY CONSIDERING THE EFFECT OF MEAN STRESS

In this study, the effect of average stress on the fatigue properties of 7075-T651 aluminum alloy was studied, and four stress ratios of <italic>R</italic> = 0.5, 0.3, 0.1 and -0.1 were selected for fatigue experiments. The results show that under the same stress ratio, with the increase...

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Main Authors: 俞俊, 王宇, 李海芳, 翁硕, 何小田, 赵礼辉谢春莉, 王伟利, 朱佳佳
Format: Article
Language:zho
Published: Editorial Office of Journal of Mechanical Strength 2024-04-01
Series:Jixie qiangdu
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Online Access:http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2024.02.025
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author 俞俊
王宇
李海芳
翁硕
何小田
赵礼辉谢春莉
王伟利
朱佳佳
author_facet 俞俊
王宇
李海芳
翁硕
何小田
赵礼辉谢春莉
王伟利
朱佳佳
author_sort 俞俊
collection DOAJ
description In this study, the effect of average stress on the fatigue properties of 7075-T651 aluminum alloy was studied, and four stress ratios of <italic>R</italic> = 0.5, 0.3, 0.1 and -0.1 were selected for fatigue experiments. The results show that under the same stress ratio, with the increase of the peak stress level, the fatigue life gradually decreases, under the same peak stress level, with the increase of the stress ratio, the fatigue life shows a trend of increasing gradually. At the same time, using the scanning electron microscopy (SEM) to observe the fatigue fracture morphology, it is found that under the same peak stress, the sector area of the crack initiation and propagation zone increases with the inerease of the average stress. Finally, based on the fatigue test results of 7075-T651 aluminum alloy, an improved prediction model considering <italic>S</italic>-<italic>N</italic>-<italic>R</italic> is proposed in this paper. The comparison results show that this model has better prediction effect to a certain extent than other models.
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id doaj-art-8787ea86921e4369ab73098a8c098ef8
institution Kabale University
issn 1001-9669
language zho
publishDate 2024-04-01
publisher Editorial Office of Journal of Mechanical Strength
record_format Article
series Jixie qiangdu
spelling doaj-art-8787ea86921e4369ab73098a8c098ef82025-01-15T02:45:34ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692024-04-014644645263929894RESEARCH ON FATIGUE PROPERTIES OF 7075-T651 ALUMINUM ALLOY CONSIDERING THE EFFECT OF MEAN STRESS俞俊王宇李海芳翁硕何小田赵礼辉谢春莉王伟利朱佳佳In this study, the effect of average stress on the fatigue properties of 7075-T651 aluminum alloy was studied, and four stress ratios of <italic>R</italic> = 0.5, 0.3, 0.1 and -0.1 were selected for fatigue experiments. The results show that under the same stress ratio, with the increase of the peak stress level, the fatigue life gradually decreases, under the same peak stress level, with the increase of the stress ratio, the fatigue life shows a trend of increasing gradually. At the same time, using the scanning electron microscopy (SEM) to observe the fatigue fracture morphology, it is found that under the same peak stress, the sector area of the crack initiation and propagation zone increases with the inerease of the average stress. Finally, based on the fatigue test results of 7075-T651 aluminum alloy, an improved prediction model considering <italic>S</italic>-<italic>N</italic>-<italic>R</italic> is proposed in this paper. The comparison results show that this model has better prediction effect to a certain extent than other models.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2024.02.0257075-T651 aluminum alloyAverage stressFatigue lifeFracture morphologyPrediction model
spellingShingle 俞俊
王宇
李海芳
翁硕
何小田
赵礼辉谢春莉
王伟利
朱佳佳
RESEARCH ON FATIGUE PROPERTIES OF 7075-T651 ALUMINUM ALLOY CONSIDERING THE EFFECT OF MEAN STRESS
Jixie qiangdu
7075-T651 aluminum alloy
Average stress
Fatigue life
Fracture morphology
Prediction model
title RESEARCH ON FATIGUE PROPERTIES OF 7075-T651 ALUMINUM ALLOY CONSIDERING THE EFFECT OF MEAN STRESS
title_full RESEARCH ON FATIGUE PROPERTIES OF 7075-T651 ALUMINUM ALLOY CONSIDERING THE EFFECT OF MEAN STRESS
title_fullStr RESEARCH ON FATIGUE PROPERTIES OF 7075-T651 ALUMINUM ALLOY CONSIDERING THE EFFECT OF MEAN STRESS
title_full_unstemmed RESEARCH ON FATIGUE PROPERTIES OF 7075-T651 ALUMINUM ALLOY CONSIDERING THE EFFECT OF MEAN STRESS
title_short RESEARCH ON FATIGUE PROPERTIES OF 7075-T651 ALUMINUM ALLOY CONSIDERING THE EFFECT OF MEAN STRESS
title_sort research on fatigue properties of 7075 t651 aluminum alloy considering the effect of mean stress
topic 7075-T651 aluminum alloy
Average stress
Fatigue life
Fracture morphology
Prediction model
url http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2024.02.025
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