Article(id=1241446330531377476, tenantId=1146029695717560320, journalId=1227999626482147330, issueId=1241446328396476740, articleNumber=null, orderNo=null, doi=10.16579/j.issn.1001.9669.2025.07.010, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1698681600000, receivedDateStr=2023-10-31, revisedDate=1708444800000, revisedDateStr=2024-02-21, acceptedDate=null, acceptedDateStr=null, onlineDate=1773913470155, onlineDateStr=2026-03-19, pubDate=1752508800000, pubDateStr=2025-07-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773913470155, onlineIssueDateStr=2026-03-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773913470155, creator=13701087609, updateTime=1773913470155, updator=13701087609, issue=Issue{id=1241446328396476740, tenantId=1146029695717560320, journalId=1227999626482147330, year='2025', volume='47', issue='7', pageStart='1', pageEnd='158', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773913469647, creator=13701087609, updateTime=1773916972123, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241461018921062969, tenantId=1146029695717560320, journalId=1227999626482147330, issueId=1241446328396476740, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241461018921062970, tenantId=1146029695717560320, journalId=1227999626482147330, issueId=1241446328396476740, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=80, endPage=85, ext={EN=ArticleExt(id=1241446330824978758, articleId=1241446330531377476, tenantId=1146029695717560320, journalId=1227999626482147330, language=EN, title=Study on the influence of sample size and roughness on fatigue performance of 7085 aluminum alloy, columnId=1241446330749481285, journalTitle=Journal of Mechanical Strength, columnName=·Fatigue·Damage·Fracture·Failure Analysis·, runingTitle=null, highlight=null, articleAbstract=
The fatigue limit of 7085 aluminum alloy was tested by four-point bending fatigue test for samples of different sizes and roughness. The results show that the greater the thickness of the specimen, the greater the ultimate fatigue strength of the material. The higher the surface roughness of the sample, the lower the ultimate fatigue strength of the material. The stress analysis and calculation of the specimen show that the dangerous cross section occurs at the position where the indenter contacts the specimen, where the specimen is subjected to the combined action of bending normal stress and shear force. With the increase of the thickness of the specimen, the shear force on the specimen decreases, and the bending normal stress on the specimen increases under the same fatigue limit. And vice versa. The relation between the surface roughness and the radius of curvature of the sample is shown by establishing a simplified model, and then the relationship between the surface roughness and the fatigue ultimate strength of the material is obtained.
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对不同尺寸和粗糙度的试样进行四点弯曲疲劳试验测试7085铝合金疲劳极限。试验表明,试样厚度越大,材料疲劳极限强度越大;试样表面粗糙度越大,材料疲劳极限强度越小。对试样进行受力分析计算发现,危险截面发生在压头与试样接触的位置,此处试样受到了弯曲正应力及剪切力的共同作用,随着试样厚度的增加,试样所受剪切力减小,相同疲劳极限下试样对应的弯曲正应力增大;反之亦然。通过建立简化模型表明试样表面粗糙度与曲率半径之间的关系,进而得出表面粗糙度与材料疲劳极限强度的关系。
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袁珂,男,1994年生,湖南邵阳人,硕士,工程师;主要研究方向为航空发动机材料与工艺;E-mail:814539984@qq.com。
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袁珂,男,1994年生,湖南邵阳人,硕士,工程师;主要研究方向为航空发动机材料与工艺;E-mail:814539984@qq.com。
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Fatigue limit rise and fall diagram of the four-point bending sample (t=3 mm,Ra=3. 2 μm), figureFileSmall=leTjksYt7cfB6zJmwjkmHw==, figureFileBig=PeO1G5f6DITBsFxkbKIXWw==, tableContent=null), ArticleFig(id=1241446344783622768, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图1, caption=
四点弯曲试样疲劳极限升降图(t=3 mm,Ra=3.2 μm), figureFileSmall=leTjksYt7cfB6zJmwjkmHw==, figureFileBig=PeO1G5f6DITBsFxkbKIXWw==, tableContent=null), ArticleFig(id=1241446345127555702, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig.2, caption=
Fatigue limit rise and fall diagram of the four-point bending sample(t=4 mm,Ra=3. 2 μm), figureFileSmall=Ntgo0aQrxHe65irKkTXgsA==, figureFileBig=NGcYapZX+eEFDJDt1NgM3Q==, tableContent=null), ArticleFig(id=1241446345224024697, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图2, caption=
四点弯曲试样疲劳极限升降图(t=4 mm,Ra=3.2 μm), figureFileSmall=Ntgo0aQrxHe65irKkTXgsA==, figureFileBig=NGcYapZX+eEFDJDt1NgM3Q==, tableContent=null), ArticleFig(id=1241446345337270907, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig.3, caption=
Fatigue limit rise and fall diagram of the four-point bending sample(t=5 mm,Ra=3. 2 μm), figureFileSmall=WK/iRWPRBQc5pyvnX8zzHQ==, figureFileBig=ZpXGyTNojR46G28zuOSFOA==, tableContent=null), ArticleFig(id=1241446345450517118, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图3, caption=
四点弯曲试样疲劳极限升降图(t=5 mm,Ra=3.2 μm), figureFileSmall=WK/iRWPRBQc5pyvnX8zzHQ==, figureFileBig=ZpXGyTNojR46G28zuOSFOA==, tableContent=null), ArticleFig(id=1241446345542791808, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 4, caption=
Fatigue limit rise and fall diagram of the four-point bending sample(t=4 mm,Ra=0.8 μm), figureFileSmall=C3vzdvVT4/k/XyT4J6yYAg==, figureFileBig=O34oUpUA3dTVdU4d1D7Tww==, tableContent=null), ArticleFig(id=1241446345622483588, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图4, caption=
四点弯曲试样疲劳极限升降图(t=4 mm,Ra=0.8 μm), figureFileSmall=C3vzdvVT4/k/XyT4J6yYAg==, figureFileBig=O34oUpUA3dTVdU4d1D7Tww==, tableContent=null), ArticleFig(id=1241446345714758279, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig.5, caption=
Fatigue limit rise and fall diagram of the four-point bending sample (t=4 mm,Ra=1. 6 μm), figureFileSmall=TKXjUZCyrK52YzlVR5oexw==, figureFileBig=K1Z34cYbbb5Sh76rK56EJA==, tableContent=null), ArticleFig(id=1241446345790255754, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图5, caption=
四点弯曲试样疲劳极限升降图(t=4 mm,Ra=1.6 μm), figureFileSmall=TKXjUZCyrK52YzlVR5oexw==, figureFileBig=K1Z34cYbbb5Sh76rK56EJA==, tableContent=null), ArticleFig(id=1241446345853170317, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 6, caption=
Schematic diagram of the four-point bending fatigue test, figureFileSmall=bhanHMbkTAh8QvqPG8f9/w==, figureFileBig=rtN21wNzFp5hTWjm7c33ag==, tableContent=null), ArticleFig(id=1241446345962222225, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图6, caption=
四点弯曲疲劳试验原理图, figureFileSmall=bhanHMbkTAh8QvqPG8f9/w==, figureFileBig=rtN21wNzFp5hTWjm7c33ag==, tableContent=null), ArticleFig(id=1241446346062885523, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 7, caption=
Fixture and equipment of the four-point bending fatigue test for small samples, figureFileSmall=AyeY46fiXBeBBRr85H8iXg==, figureFileBig=FEECfw+Hn8mFDsK2ukXpGQ==, tableContent=null), ArticleFig(id=1241446346163548823, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图7, caption=
小样四点弯曲疲劳试验工装与设备, figureFileSmall=AyeY46fiXBeBBRr85H8iXg==, figureFileBig=FEECfw+Hn8mFDsK2ukXpGQ==, tableContent=null), ArticleFig(id=1241446346310349465, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 8, caption=
Influence of sample thickness on median fatigue strength, figureFileSmall=7O+gn53d/eU9/ph6HEPIvA==, figureFileBig=ywRWgToxJvkSI8NILNjETQ==, tableContent=null), ArticleFig(id=1241446346377458329, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图8, caption=
中值疲劳强度受试样厚度的影响, figureFileSmall=7O+gn53d/eU9/ph6HEPIvA==, figureFileBig=ywRWgToxJvkSI8NILNjETQ==, tableContent=null), ArticleFig(id=1241446346457150107, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 9, caption=
Influence of the thickness on the combined force of the specimen with considering the shear force, figureFileSmall=CP9fkWE+TX3iVTTpOu+jSA==, figureFileBig=b3t4Rd6aiEHxg0JQCvyKlg==, tableContent=null), ArticleFig(id=1241446348063568542, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图9, caption=
考虑剪切力的试样所受合力受试样厚度的影响, figureFileSmall=CP9fkWE+TX3iVTTpOu+jSA==, figureFileBig=b3t4Rd6aiEHxg0JQCvyKlg==, tableContent=null), ArticleFig(id=1241446348143260321, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 10, caption=
Curves of median fatigue strength-roughness, figureFileSmall=8knoz/Ih5K+fYxbmC41OgA==, figureFileBig=9mKThbVes1HyqyzDx2eU9g==, tableContent=null), ArticleFig(id=1241446348231340707, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图10, caption=
中值疲劳强度-粗糙度曲线, figureFileSmall=8knoz/Ih5K+fYxbmC41OgA==, figureFileBig=9mKThbVes1HyqyzDx2eU9g==, tableContent=null), ArticleFig(id=1241446348315226789, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 11, caption=
Curves of stress concentration factor-notch depth of the single-micro notch, figureFileSmall=wu1ny6JAFg/+c/XLJ5gS9w==, figureFileBig=H/9+a+8vpO9oyxW7qXBHAw==, tableContent=null), ArticleFig(id=1241446348407501479, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图11, caption=
单微缺口的应力集中系数-缺口深度曲线, figureFileSmall=wu1ny6JAFg/+c/XLJ5gS9w==, figureFileBig=H/9+a+8vpO9oyxW7qXBHAw==, tableContent=null), ArticleFig(id=1241446348562690731, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 12, caption=
Model of the stress concentration factor, figureFileSmall=wR2wbeeMQb5dIrtIdC9ciQ==, figureFileBig=8DS9+eSZERd6BCZJDXHU/g==, tableContent=null), ArticleFig(id=1241446348654965423, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图12, caption=
应力集中系数模型, figureFileSmall=wR2wbeeMQb5dIrtIdC9ciQ==, figureFileBig=8DS9+eSZERd6BCZJDXHU/g==, tableContent=null), ArticleFig(id=1241446348734657200, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 13, caption=
Model relational expression, figureFileSmall=omvdWB8CTeUWpupA5G4gDQ==, figureFileBig=b4gOhX34evDF0QvXnl1/qQ==, tableContent=null), ArticleFig(id=1241446348864680627, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图13, caption=
模型关系式, figureFileSmall=omvdWB8CTeUWpupA5G4gDQ==, figureFileBig=b4gOhX34evDF0QvXnl1/qQ==, tableContent=null), ArticleFig(id=1241446348961149620, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 14, caption=
Influence of Ra and a on the curvature radius of rough surfaces, figureFileSmall=UwutenOWNnMMTjh5EcmCfA==, figureFileBig=f8QFrU3d7c2qUte1sRHVAg==, tableContent=null), ArticleFig(id=1241446349066007225, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图14, caption=
参数Ra和a对粗糙表面曲率半径的影响, figureFileSmall=UwutenOWNnMMTjh5EcmCfA==, figureFileBig=f8QFrU3d7c2qUte1sRHVAg==, tableContent=null), ArticleFig(id=1241446349145699003, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 15, caption=
Classification of curvature radius variation with surface roughness, figureFileSmall=mFOyknP7fEaIxfA4DreHhw==, figureFileBig=bMce3KOIMEnyVO0L8pfXIg==, tableContent=null), ArticleFig(id=1241446349263139516, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图15, caption=
曲率半径随粗糙度变化的划分, figureFileSmall=mFOyknP7fEaIxfA4DreHhw==, figureFileBig=bMce3KOIMEnyVO0L8pfXIg==, tableContent=null), ArticleFig(id=1241446349342831295, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 16, caption=
Sample fracture condition, figureFileSmall=ndDGMQnouVt3X4HlcC7TpA==, figureFileBig=/vjctCs/SsysFVWjF9sNmA==, tableContent=null), ArticleFig(id=1241446349422523074, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图16, caption=
试样断裂情况, figureFileSmall=ndDGMQnouVt3X4HlcC7TpA==, figureFileBig=/vjctCs/SsysFVWjF9sNmA==, tableContent=null), ArticleFig(id=1241446349535769285, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Fig. 17, caption=
Fatigue fracture of the four-point bending specimen, figureFileSmall=yLZ7Wj4mi5mUW9BNt5dVZg==, figureFileBig=5zUiZ3YXfPnDUji88asC9Q==, tableContent=null), ArticleFig(id=1241446349598683848, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=图17, caption=
四点弯曲试样疲劳断口, figureFileSmall=yLZ7Wj4mi5mUW9BNt5dVZg==, figureFileBig=5zUiZ3YXfPnDUji88asC9Q==, tableContent=null), ArticleFig(id=1241446349690958538, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=EN, label=Tab. 1, caption=
Test matrix
, figureFileSmall=null, figureFileBig=null, tableContent=
试样厚度 Sample thickness t /mm | 试样表面粗糙度 Surface roughness of the sample Ra/μm |
|---|
| 3 | 3.2 |
| 4 | 3.2 |
| 5 | 3.2 |
| 4 | 0.8 |
| 4 | 1.6 |
), ArticleFig(id=1241446349804204749, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241446330531377476, language=CN, label=表1, caption=
试验矩阵
, figureFileSmall=null, figureFileBig=null, tableContent=
试样厚度 Sample thickness t /mm | 试样表面粗糙度 Surface roughness of the sample Ra/μm |
|---|
| 3 | 3.2 |
| 4 | 3.2 |
| 5 | 3.2 |
| 4 | 0.8 |
| 4 | 1.6 |
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