Article(id=1243880299524899035, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243880295267676686, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1007-7294.2024.11.009, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1716825600000, receivedDateStr=2024-05-28, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1774493773584, onlineDateStr=2026-03-26, pubDate=1732032000000, pubDateStr=2024-11-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774493773584, onlineIssueDateStr=2026-03-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774493773584, creator=13701087609, updateTime=1774493773584, updator=13701087609, issue=Issue{id=1243880295267676686, tenantId=1146029695717560320, journalId=1240685776644648972, year='2024', volume='28', issue='11', pageStart='1633', pageEnd='1802', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1774493772569, creator=13701087609, updateTime=1774494101943, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1243881676808499395, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243880295267676686, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1243881676808499396, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243880295267676686, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1721, endPage=1730, ext={EN=ArticleExt(id=1243880299784945888, articleId=1243880299524899035, tenantId=1146029695717560320, journalId=1240685776644648972, language=EN, title=Dynamic mechanical performance and pre-deformation behavior of JDA1b alloy, columnId=1242129251223274417, journalTitle=Journal of Ship Mechanics, columnName=Structural Mechanics, runingTitle=null, highlight=null, articleAbstract=
Aluminum alloys have been widely used in the ship industry for their low density, high specific strength and specific stiffness. However, compared with steel, the strength of aluminum alloy is low. To improve its strength, JDA1b aluminum alloy, which is often used in die casting and outfitting parts of ships, was taken as the research object. Pre-strain tensile, pre-bend tests and dynamic tensile tests were carried out to investigate the effects of pre-strain and pre-bend on the mechanical performance of JDA1b alloy, and the effects of strain rate on the flow behaviors of the alloy were also investigated. The results show that increasing the strain rate can increase the flow stress and tensile strength of the material; the yield stress and tensile strength of this material increase with the increase of pre-strain, and the elongation decreases, and that the increase of pre-bend is favorable to improve the bending yield load, bending stiffness and damage displacement of the material. A new dynamic constitutive model considering ultimate stress and critical strain was proposed, which allows the flow stress to be predicted more precisely at various strain rates over a wide range of 1~800/s, and the fitting goodness-of-fit value reached 0.999. This study provides methods to improve the strength of aluminum alloys, and the proposed constitutive model is conducive to the improvement of the accuracy of the simulation of mechanical performance of parts.
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铝合金因其低密度、高比强度和大比刚度等优点在船舶工业中得到了大量应用。但是相比于钢材,铝合金的强度偏低。为了提高铝合金材料的强度,以常应用于船舶压铸件和舾装件的JDA1b铝合金为研究对象,开展预变形拉伸和弯曲试验以及动态拉伸试验,研究预应变、预弯曲对JDA1b合金力学性能的影响,同时也研究应变率对合金流动力学行为的影响。结果表明:提高应变率能增加材料的流动应力和抗拉强度;随着预应变的增加,材料的屈服应力和抗拉强度会增大,但延伸率会降低;预弯量的增加有利于提高材料的弯曲屈服载荷、弯曲刚度和破坏位移。提出考虑极限强度和临界应变的新动态本构模型,该模型能够准确地预测JDA1b合金在不同应变率(1~800/s)时的流动应力,拟合优度值达到了0.999。本文的研究可为提高铝合金强度提供方法参考,新提出的本构模型有助于提高零件力学性能仿真计算的精度。
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拉伸和弯曲试验设备, figureFileSmall=LEDODkuO8FZIm3XB1R+XYQ==, figureFileBig=BD29oVbPq/P7AHF842C68A==, tableContent=null), ArticleFig(id=1243880308643316262, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Fig.4, caption=
Method of evaluating the pre-deformation hardening characteristics of materials, figureFileSmall=xCZk04VPd1RCOoRtvG6F3Q==, figureFileBig=XDz115t+VGATTXkNNMfteA==, tableContent=null), ArticleFig(id=1243880308748173864, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=图4, caption=
评定材料预变形硬化特性的方法, figureFileSmall=xCZk04VPd1RCOoRtvG6F3Q==, figureFileBig=XDz115t+VGATTXkNNMfteA==, tableContent=null), ArticleFig(id=1243880308836254250, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Fig.5, caption=
True stress-strain curves of JDA1b alloy at different strain rates, figureFileSmall=K4+NGOEBkcKeXIJhj4K3fw==, figureFileBig=iU7YtqSXk7A3I4f2iANk6g==, tableContent=null), ArticleFig(id=1243880308936917551, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=图5, caption=
JDA1b铝合金在不同应变率下的真应力-应变曲线, figureFileSmall=K4+NGOEBkcKeXIJhj4K3fw==, figureFileBig=iU7YtqSXk7A3I4f2iANk6g==, tableContent=null), ArticleFig(id=1243880309117272628, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Fig.6, caption=
True stress-strain curves of JDA1b alloy at different pre-strains, figureFileSmall=9OCXFCgPKyOaprZit2dfpA==, figureFileBig=Nux5M3FPmxRjTt5RC6XsMg==, tableContent=null), ArticleFig(id=1243880309226324536, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=图6, caption=
JDA1b铝合金在不同预应变下的真应力-应变曲线, figureFileSmall=9OCXFCgPKyOaprZit2dfpA==, figureFileBig=Nux5M3FPmxRjTt5RC6XsMg==, tableContent=null), ArticleFig(id=1243880309347959358, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Fig.7, caption=
Load-displacement curves of JDA1b alloy at different pre-bends, figureFileSmall=2/uVgfH8hiRTFllGUBZcEA==, figureFileBig=wWbS/6PtTjrAtS0gOSZ+rg==, tableContent=null), ArticleFig(id=1243880309436039746, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=图7, caption=
JDA1b铝合金在不同预弯曲下的载荷-位移曲线, figureFileSmall=2/uVgfH8hiRTFllGUBZcEA==, figureFileBig=wWbS/6PtTjrAtS0gOSZ+rg==, tableContent=null), ArticleFig(id=1243880309557674568, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Fig.8, caption=
Comparisons among experimental flow stress values as well as values predicted by the J-C model and the proposed model for JDA1b alloy at different strain rates, figureFileSmall=El6zHPE4QNfwQyfgjqf2Hw==, figureFileBig=kAFAVRErAPzVQruUf2fJ+w==, tableContent=null), ArticleFig(id=1243880309645754957, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=图8, caption=
JDA1b铝合金在不同应变率下流变应力值与J-C模型预测值和提出模型的预测值的比较, figureFileSmall=El6zHPE4QNfwQyfgjqf2Hw==, figureFileBig=kAFAVRErAPzVQruUf2fJ+w==, tableContent=null), ArticleFig(id=1243880309746418258, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Fig.9, caption=
Four stages of stress-strain curves of JDA1b alloy during tensile process, figureFileSmall=d0DA7bfzwOIQ7coH0mThaA==, figureFileBig=Ix8efuiI3IJh3andchapGw==, tableContent=null), ArticleFig(id=1243880309943550554, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=图9, caption=
JDA1b铝合金拉伸过程应力-应变曲线的四个阶段, figureFileSmall=d0DA7bfzwOIQ7coH0mThaA==, figureFileBig=Ix8efuiI3IJh3andchapGw==, tableContent=null), ArticleFig(id=1243880310052602461, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Fig.10, caption=
Proposed model at different critical strains, figureFileSmall=zocKz6zJpslQ4AX19vvYbQ==, figureFileBig=2J72Wj/c/NrvplJ2jDfBUw==, tableContent=null), ArticleFig(id=1243880310161654373, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=图10, caption=
提出的模型在不同临界应变下的变化, figureFileSmall=zocKz6zJpslQ4AX19vvYbQ==, figureFileBig=2J72Wj/c/NrvplJ2jDfBUw==, tableContent=null), ArticleFig(id=1243880310279094892, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Fig.11, caption=
Proposed model at different values of p, figureFileSmall=cc+J/LYelKXqx6Ey9WkGcw==, figureFileBig=vhVZqxBpgWY87r8vkjnopg==, tableContent=null), ArticleFig(id=1243880310383952497, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=图11, caption=
提出的模型在不同参数p下的变化, figureFileSmall=cc+J/LYelKXqx6Ey9WkGcw==, figureFileBig=vhVZqxBpgWY87r8vkjnopg==, tableContent=null), ArticleFig(id=1243880310484615800, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Fig.12, caption=
Mechanical performance of JDA1 alloy at different pre-strains, figureFileSmall=+sZWZZOALp4Ybtv6nSo1Fw==, figureFileBig=ILItbfNrcrUtipKdH7SlyQ==, tableContent=null), ArticleFig(id=1243880310610444930, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=图12, caption=
JDA1铝合金在不同预应变下的力学性能变化, figureFileSmall=+sZWZZOALp4Ybtv6nSo1Fw==, figureFileBig=ILItbfNrcrUtipKdH7SlyQ==, tableContent=null), ArticleFig(id=1243880310715302537, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Fig.13, caption=
Mechanical performance of JDA1 alloy at different pre-bends, figureFileSmall=h1zBdWe2p+ix6O1vwA3yCg==, figureFileBig=87TgJpyiWCqCzKsH1njDMA==, tableContent=null), ArticleFig(id=1243880310807577233, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=图13, caption=
JDA1铝合金在不同预弯曲下的力学性能变化, figureFileSmall=h1zBdWe2p+ix6O1vwA3yCg==, figureFileBig=87TgJpyiWCqCzKsH1njDMA==, tableContent=null), ArticleFig(id=1243880310958572184, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Tab.1, caption=
Chemical compositions of the JDA1b alloy (wt.%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| 元素 | Si | Mg | Cu | Mn | Ti | Fe | V | Sr | RE | Al |
|---|
| 含量 | 8.8019 | 0.2894 | 0.1205 | 0.6821 | 0.1719 | 0.0993 | 0.0111 | 0.0319 | 0.0523 | 余量 |
), ArticleFig(id=1243880311092789919, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=表1, caption=
JDA1b合金的化学成分(wt.%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| 元素 | Si | Mg | Cu | Mn | Ti | Fe | V | Sr | RE | Al |
|---|
| 含量 | 8.8019 | 0.2894 | 0.1205 | 0.6821 | 0.1719 | 0.0993 | 0.0111 | 0.0319 | 0.0523 | 余量 |
), ArticleFig(id=1243880311252173480, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Tab.2, caption=
Material constants in the J-C model of JDA1b alloy
, figureFileSmall=null, figureFileBig=null, tableContent=
| A/MPa | B/MPa | C | n |
|---|
| 值 | 163.25 | 392.93 | 0.007 36 | 0.413 45 |
| 方差 | 13.948 | 127.91 | 3.6952×10-6 | 0.012 07 |
), ArticleFig(id=1243880311398974126, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=表2, caption=
JDA1b铝合金的J-C模型材料常数
, figureFileSmall=null, figureFileBig=null, tableContent=
| A/MPa | B/MPa | C | n |
|---|
| 值 | 163.25 | 392.93 | 0.007 36 | 0.413 45 |
| 方差 | 13.948 | 127.91 | 3.6952×10-6 | 0.012 07 |
), ArticleFig(id=1243880311537386165, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Tabl.3, caption=
Material constants in the proposed model of the JDA1b alloy
, figureFileSmall=null, figureFileBig=null, tableContent=
| A/MPa | Q/MPa | ε0 | p | C |
|---|
| 值 | 163.25 | 366.70 | 0.034 25 | 1.035 29 | 0.007 32 |
| 方差 | 13.948 | 13.948 | 5.9675×10-6 | 0.00598 | 8.0528×10-7 |
), ArticleFig(id=1243880311671603903, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=表3, caption=
JDA1b铝合金在新提出的模型中的材料常数
, figureFileSmall=null, figureFileBig=null, tableContent=
| A/MPa | Q/MPa | ε0 | p | C |
|---|
| 值 | 163.25 | 366.70 | 0.034 25 | 1.035 29 | 0.007 32 |
| 方差 | 13.948 | 13.948 | 5.9675×10-6 | 0.00598 | 8.0528×10-7 |
), ArticleFig(id=1243880311797433029, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=EN, label=Tab.4, caption=
Er of the J-C model and proposed model
, figureFileSmall=null, figureFileBig=null, tableContent=
| 应变率/s-1 | Er(%) |
|---|
| J-C模型 | 提出模型 |
|---|
| 1 | 2.66 | 0.21 |
| 10 | 2.34 | 0.31 |
| 50 | 2.95 | 0.25 |
| 100 | 3.11 | 0.35 |
| 500 | 2.11 | 0.37 |
| 800 | 2.75 | 0.28 |
), ArticleFig(id=1243880311935845069, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299524899035, language=CN, label=表4, caption=
J-C模型和提出模型的Er值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 应变率/s-1 | Er(%) |
|---|
| J-C模型 | 提出模型 |
|---|
| 1 | 2.66 | 0.21 |
| 10 | 2.34 | 0.31 |
| 50 | 2.95 | 0.25 |
| 100 | 3.11 | 0.35 |
| 500 | 2.11 | 0.37 |
| 800 | 2.75 | 0.28 |
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