Article(id=1195320604426543239, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1195320600727167098, articleNumber=null, orderNo=null, doi=10.19710/J.cnki.1003-8817.20240247, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=null, receivedDateStr=null, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1762916240077, onlineDateStr=2025-11-12, pubDate=1742400000000, pubDateStr=2025-03-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762916240077, onlineIssueDateStr=2025-11-12, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762916240077, creator=13701087609, updateTime=1762916240077, updator=13701087609, issue=Issue{id=1195320600727167098, tenantId=1146029695717560320, journalId=1189873562199433220, year='2025', volume='', issue='3', pageStart='1', pageEnd='72', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1762916239195, creator=13701087609, updateTime=1762916470865, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1195321572484485387, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1195320600727167098, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1195321572484485388, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1195320600727167098, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=55, endPage=60, ext={EN=ArticleExt(id=1195320604678201481, articleId=1195320604426543239, tenantId=1146029695717560320, journalId=1189873562199433220, language=EN, title=Fatigue Analysis Study of Automotive Brake Pedal Based on Fault Tree Method, columnId=1190284220686766583, journalTitle=Automobile Technology & Material, columnName=Original article, runingTitle=null, highlight=null, articleAbstract=
To improve the service life of automotive brake pedals, this paper investigates the impact of different factors affecting the fatigue failure of automotive pedal components, applies the Fault Tree Analysis (FTA) method to solve the structural importance of components through the minimal cutset. The frndings indicates that material and load are the primary causes affecting the life of brake pedal components, with stress concentration being a seeondary cause. Taking a heavy truck brake pedal Finite Element(FE) model as an example, the finite element software Hypermesh and fatigue software nCode are used for predication and analysis, and the stiffness test experiment of the pedal is carried out to verify the rationality of the model.
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为提高汽车制动踏板的使用寿命,研究了不同影响因素对汽车制动踏板构件疲劳失效的影响程度,采用故障树法(FTA),通过最小割集求解构件故障树的结构重要度,得出材料和载荷是影响制动踏板构件寿命的主要原因,应力集中为次要原因,以某重型载货汽车制动踏板有限元模型为例,利用有限元软件HyperMesh和疲劳软件nCode加以预测分析,并对踏板进行刚度测试试验,验证了模型的合理性。
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方玉杰(1991—),男,讲师,硕士学位,研究方向为汽车轻量化。
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方玉杰(1991—),男,讲师,硕士学位,研究方向为汽车轻量化。
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方玉杰(1991—),男,讲师,硕士学位,研究方向为汽车轻量化。
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| 事件代号 | 事件意义 | 事件代号 | 事件意义 |
| A | 疲劳破断 | X3 | 材料类型 |
| B1 | 设计 | X4 | 材料参数 |
| B2 | 制造加工 | X5 | 热处理方式 |
| B3 | 使用 | X6 | 热处理参数 |
| C1 | 材料 | X7 | 粗糙度 |
| C2 | 热处理 | X8 | 表面强化 |
| C3 | 表面处理 | X9 | 焊接方式 |
| C4 | 焊接 | X10 | 焊接参数 |
| C5 | 环境 | X11 | 腐蚀环境 |
| C6 | 工况 | X12 | 特殊气候 |
| X1 | 结构 | X13 | 载荷强度 |
| X2 | 尺寸 | X14 | 循环次数 |
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故障树代码定义
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| 事件代号 | 事件意义 | 事件代号 | 事件意义 |
| A | 疲劳破断 | X3 | 材料类型 |
| B1 | 设计 | X4 | 材料参数 |
| B2 | 制造加工 | X5 | 热处理方式 |
| B3 | 使用 | X6 | 热处理参数 |
| C1 | 材料 | X7 | 粗糙度 |
| C2 | 热处理 | X8 | 表面强化 |
| C3 | 表面处理 | X9 | 焊接方式 |
| C4 | 焊接 | X10 | 焊接参数 |
| C5 | 环境 | X11 | 腐蚀环境 |
| C6 | 工况 | X12 | 特殊气候 |
| X1 | 结构 | X13 | 载荷强度 |
| X2 | 尺寸 | X14 | 循环次数 |
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| 事件代号 | 事件意义 | 事件代号 | 事件意义 |
| A | 疲劳断裂 | X3 | 焊接 |
| B1 | 应力集中 | X4 | 表面处理 |
| X1 | 材料 | X5 | 尺寸 |
| X2 | 载荷 | X6 | 结构 |
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故障树代码定义
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| 事件代号 | 事件意义 | 事件代号 | 事件意义 |
| A | 疲劳断裂 | X3 | 焊接 |
| B1 | 应力集中 | X4 | 表面处理 |
| X1 | 材料 | X5 | 尺寸 |
| X2 | 载荷 | X6 | 结构 |
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| 载荷/N | 疲劳循环次数/次 |
| 500 | 1.13×107 |
| 700 | 9.12×106 |
| 1 000 | 7.32×106 |
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载荷与疲劳循环次数的关系
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| 载荷/N | 疲劳循环次数/次 |
| 500 | 1.13×107 |
| 700 | 9.12×106 |
| 1 000 | 7.32×106 |
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| 材料 | 疲劳循环次数/次 |
| Q195 | 1.93×106 |
| Q235 | 9.12×106 |
| S50C | 1.09×107 |
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材料与疲劳循环次数的关系
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| 材料 | 疲劳循环次数/次 |
| Q195 | 1.93×106 |
| Q235 | 9.12×106 |
| S50C | 1.09×107 |
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| 踏板厚度/mm | 疲劳循环次数/次 |
| 8 | 9.12×106 |
| 6 | 9.33×106 |
| 4 | 9.64×106 |
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尺寸与疲劳循环次数
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| 踏板厚度/mm | 疲劳循环次数/次 |
| 8 | 9.12×106 |
| 6 | 9.33×106 |
| 4 | 9.64×106 |
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| 载荷/N | 载荷/kg | 位移/mm | 应力/MPa |
| 0 | 0 | 0 | 0 |
| 100 | 10.2 | 0.76 | 24 |
| 300 | 30.6 | 1.87 | 62 |
| 500 | 51.0 | 2.42 | 103 |
| 700 | 71.4 | 3.31 | 104 |
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试验测试结果
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| 载荷/N | 载荷/kg | 位移/mm | 应力/MPa |
| 0 | 0 | 0 | 0 |
| 100 | 10.2 | 0.76 | 24 |
| 300 | 30.6 | 1.87 | 62 |
| 500 | 51.0 | 2.42 | 103 |
| 700 | 71.4 | 3.31 | 104 |
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