轴向荷载作用下小规格拉铆钉和普通螺栓疲劳性能对比研究

拉铆钉因其良好的防松动、抗疲劳和防腐性能以及较强的环境适应性等特点而被广泛应用于航空航天、轨道交通、桥梁建筑等领域。为解决光伏支架中螺栓连接易发生疲劳的问题，现研究一种国产新型拉铆钉的轴向疲劳性能，用以代替普通螺栓连接进而提高光伏支架的疲劳寿命。对LMY8和LMY10小规格拉铆钉及同规格的普通螺栓进行了轴向荷载作用下的静力试验和疲劳试验，并利用ABAQUS软件进行了拉铆钉铆接过程的模拟，利用FE-Safe软件对拉铆钉疲劳寿命进行了模拟。研究结果表明：在同样条件下，铆钉的疲劳性能优于普通螺栓的疲劳性能；拉铆钉在轴向荷载作用下的疲劳断口位于套环和锁紧环槽啮合的第一圈螺纹处，此处应力集中是拉铆钉发生...

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Published inJianzhu Gangjiegou Jinzhan Vol. 26; pp. 41 - 51
Main Authors 杨俊芬, 焦瑞婕, 钟炜辉, 李立和, 苗广威, 贾云龙
Format Journal Article
LanguageChinese
Published Editorial Department of Progress in Steel Building Structures, Tongji University 01.03.2024
Subjects
小规格拉铆钉
应力集中
普通螺栓
疲劳寿命
轴向荷载
铆接过程
Online AccessGet full text
ISSN1671-9379
DOI10.13969/j.cnki.cn31-1893.2024.03.005

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Abstract 拉铆钉因其良好的防松动、抗疲劳和防腐性能以及较强的环境适应性等特点而被广泛应用于航空航天、轨道交通、桥梁建筑等领域。为解决光伏支架中螺栓连接易发生疲劳的问题，现研究一种国产新型拉铆钉的轴向疲劳性能，用以代替普通螺栓连接进而提高光伏支架的疲劳寿命。对LMY8和LMY10小规格拉铆钉及同规格的普通螺栓进行了轴向荷载作用下的静力试验和疲劳试验，并利用ABAQUS软件进行了拉铆钉铆接过程的模拟，利用FE-Safe软件对拉铆钉疲劳寿命进行了模拟。研究结果表明：在同样条件下，铆钉的疲劳性能优于普通螺栓的疲劳性能；拉铆钉在轴向荷载作用下的疲劳断口位于套环和锁紧环槽啮合的第一圈螺纹处，此处应力集中是拉铆钉发生疲劳失效的主要原因；拉铆钉的疲劳寿命会随着最小荷载的增大而提高，随最大荷载的增大而降低；由疲劳云图可知，拉铆钉在承受轴向循环荷载作用时，铆钉头部下方R角过渡处也会产生较大的应力，此区域也是易发生疲劳失效的部位。
AbstractList 拉铆钉因其良好的防松动、抗疲劳和防腐性能以及较强的环境适应性等特点而被广泛应用于航空航天、轨道交通、桥梁建筑等领域。为解决光伏支架中螺栓连接易发生疲劳的问题，现研究一种国产新型拉铆钉的轴向疲劳性能，用以代替普通螺栓连接进而提高光伏支架的疲劳寿命。对LMY8和LMY10小规格拉铆钉及同规格的普通螺栓进行了轴向荷载作用下的静力试验和疲劳试验，并利用ABAQUS软件进行了拉铆钉铆接过程的模拟，利用FE-Safe软件对拉铆钉疲劳寿命进行了模拟。研究结果表明：在同样条件下，铆钉的疲劳性能优于普通螺栓的疲劳性能；拉铆钉在轴向荷载作用下的疲劳断口位于套环和锁紧环槽啮合的第一圈螺纹处，此处应力集中是拉铆钉发生疲劳失效的主要原因；拉铆钉的疲劳寿命会随着最小荷载的增大而提高，随最大荷载的增大而降低；由疲劳云图可知，拉铆钉在承受轴向循环荷载作用时，铆钉头部下方R角过渡处也会产生较大的应力，此区域也是易发生疲劳失效的部位。
Author 钟炜辉
焦瑞婕
贾云龙
杨俊芬
李立和
苗广威
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Snippet 拉铆钉因其良好的防松动、抗疲劳和防腐性能以及较强的环境适应性等特点而被广泛应用于航空航天、轨道交通、桥梁建筑等领域。为解决光伏支架中螺栓连接易发生疲劳的问题，现研...
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SubjectTerms 小规格拉铆钉
应力集中
普通螺栓
疲劳寿命
轴向荷载
铆接过程
Title 轴向荷载作用下小规格拉铆钉和普通螺栓疲劳性能对比研究
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