Article(id=1220689389080990514, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1220689383687115496, articleNumber=null, orderNo=null, doi=10.11868/j.issn.1001-4381.2025.000014, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1737216000000, receivedDateStr=2025-01-19, revisedDate=null, revisedDateStr=null, acceptedDate=1741536000000, acceptedDateStr=2025-03-10, onlineDate=1768964629669, onlineDateStr=2026-01-21, pubDate=1763568000000, pubDateStr=2025-11-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1768964629669, onlineIssueDateStr=2026-01-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1768964629669, creator=13701087609, updateTime=1768964629669, updator=13701087609, issue=Issue{id=1220689383687115496, tenantId=1146029695717560320, journalId=1220038251117760515, year='2025', volume='53', issue='11', pageStart='1', pageEnd='238', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1768964628383, creator=13701087609, updateTime=1768964982596, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1220690869431222607, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1220689383687115496, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1220690869431222608, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1220689383687115496, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=125, endPage=133, ext={EN=ArticleExt(id=1220689389362008893, articleId=1220689389080990514, tenantId=1146029695717560320, journalId=1220038251117760515, language=EN, title=Fatigue life prediction of titanium alloy TA19 based on Weibull distribution and first-order reliability correction, columnId=1220689384450478826, journalTitle=Journal of Materials Engineering, columnName=RESEARCH ARTICLE, runingTitle=null, highlight=null, articleAbstract=
With the improvement in aeroengine performance,critical components (such as centrifugal impellers) operate under high-temperature,high-stress,and complex load conditions. Geometric discontinuities (such as ventilation holes and fillet radii) have become weak points for fatigue failure. This study focused on TA19 material,preparing smooth and U-shaped notch specimens for low-cycle fatigue tests under high-temperature conditions. Fatigue life data have fitted using the Weibull distribution,and an improved iterative fatigue life model is proposed to address the limitations of traditional models in regions with stress concentration. The model incorporates the stress concentration factor (Kt) and first-order reliability theory for correction. The results indicate that due to stress concentration effects,U-shaped notch specimens exhibit more concentrated fatigue life distributions,whereas smooth specimens show greater variability. The Kolmogorov-Smirnov test verifies that the data conforms to the Weibull distribution characteristics. The revised model significantly improves the prediction accuracy,with most of the predicted data falling within±1.5 times the scatter band. Additionally,P-S-N curves for different failure probabilities are constructed,providing a valuable reference for the reliable fatigue life prediction of complex structures.
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随着航空发动机性能的提升,离心叶轮等关键部件在高温、高应力和复杂载荷下运行,其几何不连续区域(如通气孔和倒圆角)成为疲劳失效的薄弱环节。本工作以TA19材料为研究对象,制备光滑试样和U型缺口试样,在高温条件下开展低循环疲劳实验。通过Weibull分布拟合疲劳寿命数据,并针对传统模型在应力集中区域精度不足的问题,提出了引入应力集中因子(Kt)和一阶可靠性理论修正的迭代疲劳寿命模型。研究表明,U型缺口试样因应力集中效应疲劳寿命分布更为集中,光滑试样寿命分散性较高。Kolmogorov-Smirnov检验验证了数据符合Weibull分布特性,修正后的模型显著提高了预测精度,大多数预测数据落入±1.5倍分散带内,并绘制了不同失效概率的P-S-N曲线,为复杂结构疲劳寿命预测提供了参考。
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黄佳(1987—),男,副教授,博士,主要从事极端服役温度下结构关键件力学性能表征和损伤机理研究,联系地址:湖南省长沙市中南大学航空航天技术研究院(410083),E-mail:
huangjia216@126.com;
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1.School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China
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1.西北工业大学 动力与能源学院,西安 710072
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1.西北工业大学 动力与能源学院,西安 710072)])]), Author(id=1220810415802601877, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1220810415928431008, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, authorId=1220810415802601877, language=EN, stringName=Jian LI, firstName=Jian, middleName=null, lastName=LI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2.AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,Hunan,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1220810416012317092, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, authorId=1220810415802601877, language=CN, stringName=李坚, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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3.Research Institute of Aerospace Technology,Central South University,Changsha 410083,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1220810416364638654, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, authorId=1220810416129757613, language=CN, stringName=唐秀之, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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Fracture surface morphology of smooth(a)-(c) and U-shaped notch(d)-(f) specimens, figureFileSmall=tx27rMy5aRZdsSKIwIZYdg==, figureFileBig=KPyn5E+DkOfKoa68d4IRKA==, tableContent=null), ArticleFig(id=1220810420898681480, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=图5, caption=
光滑(a)~(c)及U型缺口(d)~(f)试样断口形貌, figureFileSmall=tx27rMy5aRZdsSKIwIZYdg==, figureFileBig=KPyn5E+DkOfKoa68d4IRKA==, tableContent=null), ArticleFig(id=1220810420974178957, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Fig.6, caption=
Linear regression curve for U-shaped notched(a) and smooth(b) specimen, figureFileSmall=43+hwsjwHPNzMHQuSgB7Fg==, figureFileBig=/crW4MDBzvkCmKzHzwqJVA==, tableContent=null), ArticleFig(id=1220810421066453650, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=图6, caption=
U型缺口(a)和光滑(b)试件的线性回归曲线, figureFileSmall=43+hwsjwHPNzMHQuSgB7Fg==, figureFileBig=/crW4MDBzvkCmKzHzwqJVA==, tableContent=null), ArticleFig(id=1220810421209059992, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Fig.7, caption=
Relationship between characteristic life and equivalent stress for U-shaped notched(a) and smooth (b) specimen, figureFileSmall=CvdfImYfi4rpZABj/OjilA==, figureFileBig=9JM8Fgr2ZlkFx5AevaTFyQ==, tableContent=null), ArticleFig(id=1220810421330694811, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=图7, caption=
U型缺口 (a)和光滑(b)试件的特征寿命与等效应力的关系, figureFileSmall=CvdfImYfi4rpZABj/OjilA==, figureFileBig=9JM8Fgr2ZlkFx5AevaTFyQ==, tableContent=null), ArticleFig(id=1220810421452329636, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Fig.8, caption=
Iterative process combining Weibull distribution and first-order reliability, figureFileSmall=sO+vD4UuCjnh3OQKdYndjA==, figureFileBig=IYBwT5YWDw6pEwmUJ4JKCQ==, tableContent=null), ArticleFig(id=1220810421573964456, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=图8, caption=
结合Weibull分布和一阶可靠性迭代流程, figureFileSmall=sO+vD4UuCjnh3OQKdYndjA==, figureFileBig=IYBwT5YWDw6pEwmUJ4JKCQ==, tableContent=null), ArticleFig(id=1220810421703987888, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Fig.9, caption=
Life prediction for TA19 notched specimen considering first-order reliability(a),life prediction for TA19 notched specimen considering first-order reliability and stress concentration factor correction(b), figureFileSmall=8X+U06LY9ubI4FZBrHcgWg==, figureFileBig=8JRKWdIJPn1zYNnZ8D1nfQ==, tableContent=null), ArticleFig(id=1220810423029387958, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=图9, caption=
考虑一阶可靠性的TA19带缺口试件寿命预测(a),考虑一阶可靠性和应力集中因子修正的TA19带缺口试件寿命预测(b), figureFileSmall=8X+U06LY9ubI4FZBrHcgWg==, figureFileBig=8JRKWdIJPn1zYNnZ8D1nfQ==, tableContent=null), ArticleFig(id=1220810423125856954, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Fig.10, caption=
P-S-N curves for notched specimens based on Weibull distribution(a),P-S-N curves for smooth specimens based on Weibull distribution(b), figureFileSmall=nkRRFJR8htuFAKks/QUEIw==, figureFileBig=vj6lU/qT4cS1ooaH+6I6OA==, tableContent=null), ArticleFig(id=1220810423276851908, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=图10, caption=
基于威布尔分布的带缺口试件P-S-N曲线(a),基于威布尔分布的光滑试件P-S-N曲线(b), figureFileSmall=nkRRFJR8htuFAKks/QUEIw==, figureFileBig=vj6lU/qT4cS1ooaH+6I6OA==, tableContent=null), ArticleFig(id=1220810423415263944, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Table 1, caption=
Specimen dimensions,theoretical stress concentration factor,and tests number
, figureFileSmall=null, figureFileBig=null, tableContent=
| Specimen shape | Notch depth/mm | Notch radius/mm | Radius/mm | Kt | Test number |
|---|
| Smooth bar | 0 | 0 | 5 | 1.00 | 13 |
| U-shaped notch | 0.3 | 0.3 | 4.4 | 2.47 | 16 |
), ArticleFig(id=1220810423524315852, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=表1, caption=
试样尺寸、理论应力集中因子及实验数量
, figureFileSmall=null, figureFileBig=null, tableContent=
| Specimen shape | Notch depth/mm | Notch radius/mm | Radius/mm | Kt | Test number |
|---|
| Smooth bar | 0 | 0 | 5 | 1.00 | 13 |
| U-shaped notch | 0.3 | 0.3 | 4.4 | 2.47 | 16 |
), ArticleFig(id=1220810423612396239, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Table 2, caption=
Low cycle fatigue life of U-shaped notch specimens
, figureFileSmall=null, figureFileBig=null, tableContent=
| σ/MPa | lgN | | |
|---|
| 640 | 2.712,2.729,2.758,2.6953,2.676 | 2.714 | 0.028 |
| 620 | 2.842,2.786,2.901,2.863,2.927 | 2.864 | 0.049 |
| 580 | 3.010,2.977,2.981,3.129,3.189 | 3.057 | 0.086 |
| 550 | 3.614,3.357,3.595,3.513,3.402 | 3.496 | 0.102 |
), ArticleFig(id=1220810423750808281, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=表2, caption=
U型缺口试样的低循环疲劳寿命
, figureFileSmall=null, figureFileBig=null, tableContent=
| σ/MPa | lgN | | |
|---|
| 640 | 2.712,2.729,2.758,2.6953,2.676 | 2.714 | 0.028 |
| 620 | 2.842,2.786,2.901,2.863,2.927 | 2.864 | 0.049 |
| 580 | 3.010,2.977,2.981,3.129,3.189 | 3.057 | 0.086 |
| 550 | 3.614,3.357,3.595,3.513,3.402 | 3.496 | 0.102 |
), ArticleFig(id=1220810423851471586, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Table 3, caption=
Low cycle fatigue life of smooth specimens
, figureFileSmall=null, figureFileBig=null, tableContent=
| σ/MPa | lgN | | |
|---|
| 660 | 2.661,2.716,2.727,2.653,2.673 | 2.686 | 0.0295 |
| 580 | 3.185,3.322,3.432,3.474,3.413 | 3.365 | 0.1029 |
| 525 | 3.568,3.741,3.696,3.823,3.507 | 3.667 | 0.1148 |
| 490 | 3.929,3.996,3.890,3.943,4.302 | 4.012 | 0.149 |
), ArticleFig(id=1220810423973106405, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=表3, caption=
光滑试样的低循环疲劳寿命
, figureFileSmall=null, figureFileBig=null, tableContent=
| σ/MPa | lgN | | |
|---|
| 660 | 2.661,2.716,2.727,2.653,2.673 | 2.686 | 0.0295 |
| 580 | 3.185,3.322,3.432,3.474,3.413 | 3.365 | 0.1029 |
| 525 | 3.568,3.741,3.696,3.823,3.507 | 3.667 | 0.1148 |
| 490 | 3.929,3.996,3.890,3.943,4.302 | 4.012 | 0.149 |
), ArticleFig(id=1220810424090546923, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Table 4, caption=
Coefficient of CV at different stress levels
, figureFileSmall=null, figureFileBig=null, tableContent=
| Notched specimen | Smooth specimen |
|---|
| Stress/MPa | CV | Stress/MPa | CV |
|---|
| 640 | 0.0103 | 660 | 0.0110 |
| 620 | 0.0173 | 580 | 0.0306 |
| 580 | 0.0282 | 525 | 0.0313 |
| 550 | 0.0293 | 490 | 0.0371 |
), ArticleFig(id=1220810424199598831, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=表4, caption=
缺口试样和光滑试样在各应力水平下的CV
, figureFileSmall=null, figureFileBig=null, tableContent=
| Notched specimen | Smooth specimen |
|---|
| Stress/MPa | CV | Stress/MPa | CV |
|---|
| 640 | 0.0103 | 660 | 0.0110 |
| 620 | 0.0173 | 580 | 0.0306 |
| 580 | 0.0282 | 525 | 0.0313 |
| 550 | 0.0293 | 490 | 0.0371 |
), ArticleFig(id=1220810424321233649, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Table 5, caption=
Fatigue life index (Dn ) at different stress levels
, figureFileSmall=null, figureFileBig=null, tableContent=
| Notched specimen | Smooth specimen |
|---|
| Stress/MPa | Dn | Stress/MPa | Dn |
|---|
| 640 | 0.175 | 660 | 0.294 |
| 620 | 0.173 | 580 | 0.156 |
| 580 | 0.217 | 525 | 0.212 |
| 550 | 0.235 | 490 | 0.173 |
), ArticleFig(id=1220810424421896950, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=表 5, caption=
不同应力水平下的疲劳寿命指数(Dn )
, figureFileSmall=null, figureFileBig=null, tableContent=
| Notched specimen | Smooth specimen |
|---|
| Stress/MPa | Dn | Stress/MPa | Dn |
|---|
| 640 | 0.175 | 660 | 0.294 |
| 620 | 0.173 | 580 | 0.156 |
| 580 | 0.217 | 525 | 0.212 |
| 550 | 0.235 | 490 | 0.173 |
), ArticleFig(id=1220810424509977336, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Table 6, caption=
Fatigue characteristic life of TA19 U-shaped notch specimens and smooth specimens
, figureFileSmall=null, figureFileBig=null, tableContent=
| Notched specimen | Smooth specimen |
|---|
| Stress/MPa | Characteristic life(N*) | Stress/MPa | Characteristic life(N*) |
|---|
| 550 | 3133 | 490 | 10280 |
| 580 | 1140 | 525 | 4645 |
| 620 | 731 | 580 | 2317 |
| 640 | 517 | 660 | 485 |
), ArticleFig(id=1220810424606446332, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=表6, caption=
TA19 U型缺口试件与光滑试件的疲劳特征寿命
, figureFileSmall=null, figureFileBig=null, tableContent=
| Notched specimen | Smooth specimen |
|---|
| Stress/MPa | Characteristic life(N*) | Stress/MPa | Characteristic life(N*) |
|---|
| 550 | 3133 | 490 | 10280 |
| 580 | 1140 | 525 | 4645 |
| 620 | 731 | 580 | 2317 |
| 640 | 517 | 660 | 485 |
), ArticleFig(id=1220810424715498243, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Table 7, caption=
Equivalent stress of TA19 U-shaped notch specimens
, figureFileSmall=null, figureFileBig=null, tableContent=
| Stress/MPa | Equivalent stress ( |
|---|
| 550 | 1360.70 |
| 580 | 1435.72 |
| 620 | 1534.88 |
| 640 | 1583.36 |
), ArticleFig(id=1220810424866493192, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=表7, caption=
TA19 U型缺口试件的等效应力
, figureFileSmall=null, figureFileBig=null, tableContent=
| Stress/MPa | Equivalent stress ( |
|---|
| 550 | 1360.70 |
| 580 | 1435.72 |
| 620 | 1534.88 |
| 640 | 1583.36 |
), ArticleFig(id=1220810424988128014, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=EN, label=Table 8, caption=
Mean,variance,and β value of the approximate function
, figureFileSmall=null, figureFileBig=null, tableContent=
| Notched specimen | Smooth specimen |
|---|
| Stress/MPa | | | β | Stress/MPa | | | β |
|---|
| 550 | 0.0318 | 0.000814 | 39.1 | 490 | 0.5678 | 0.0003 | 1892.67 |
| 580 | 0.0351 | 0.001148 | 30.6 | 525 | 0.3524 | 0.0002 | 1762 |
| 620 | 0.0403 | 0.00171 | 23.6 | 580 | 0.3406 | 0.0003 | 1135.3 |
| 640 | 0.0839 | 0.00286 | 2.93 | 660 | 0.4159 | 0.0033 | 126.03 |
), ArticleFig(id=1220810425109762837, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689389080990514, language=CN, label=表 8, caption=
近似函数的均值、方差和β值
, figureFileSmall=null, figureFileBig=null, tableContent=
| Notched specimen | Smooth specimen |
|---|
| Stress/MPa | | | β | Stress/MPa | | | β |
|---|
| 550 | 0.0318 | 0.000814 | 39.1 | 490 | 0.5678 | 0.0003 | 1892.67 |
| 580 | 0.0351 | 0.001148 | 30.6 | 525 | 0.3524 | 0.0002 | 1762 |
| 620 | 0.0403 | 0.00171 | 23.6 | 580 | 0.3406 | 0.0003 | 1135.3 |
| 640 | 0.0839 | 0.00286 | 2.93 | 660 | 0.4159 | 0.0033 | 126.03 |
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