胶接点焊接头拉伸声发射信号分析及其损伤模型
作者:
作者单位:

昆明理工大学,机电工程学院,云南省先进装备智能制造技术重点实验室,昆明 650500

作者简介:

通讯作者:

中图分类号:

TG407

基金项目:

国家自然科学基金资助项目(51565022)


Analysis of Acoustic Emission Signal in The Tensile Process of Weld-bonding Joint and Its Damage Model
Author:
Affiliation:

Yunnan Key Laboratory of Intelligent Manufacturing Technology for Advanced Equipment,Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology, Kunming 650500

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    基于Box - Behnken Design 响应面法开展胶接点焊工艺试验,分别采集了胶接点焊、点焊、粘接三种接头拉伸过程的声发射信号,采用小波包对信号进行分解重构,分析了三种接头的信号特征,同时结合撞击计数历程图对焊核失效断口进行了分析,并通过累计撞击计数建立了试件的损伤模型。结果表明:三种接头在屈服阶段和断裂阶段的声发射信号较为丰富;胶层失效和焊核拔出失效可以通过声发射信号特征进行区分,其中胶层失效时其声发射信号频率主要集中在0~62.5 kHz,焊核拔出失效时其声发射信号频率主要集中在31.25~281.25 kHz;声发射撞击计数历程图可以从总体上反映焊核失效过程;建立的损伤模型可以较好地表征试件损伤状态。

    Abstract:

    The weld-bonding test was carried out based on Box-Behnken Design response surface method, the acoustic emission signals in the stretching process of weld-bonding, spot-welding and adhesive joints were collected, and the signal was decomposed and reconstructed by wavelet packet. The weld nugget failure fracture was analyzed based on the hits history diagram, and the damage models of three kinds of joints were established through the cumulative hits. The results show that the three types of joints have abundant acoustic emission signals in the yield stage and fracture stage. Adhesive layer failure and weld nugget failure can be distinguished by acoustic emission signal characteristics. And the failure frequency of the adhesive layer is mainly concentrated in 0 to 62.5 kHz. When the weld nugget fails, the frequency is mainly concentrated in 31.25 to 281.25 kHz.The acoustic emission hits history diagram can reflect the failure process of the nugget on the whole. The established damage model can better characterize the damage state of the specimen.

    参考文献
    相似文献
    引证文献
引用本文

赵君乾,曾凯,刑保英,王凯伟,易金权.胶接点焊接头拉伸声发射信号分析及其损伤模型[J].宇航材料工艺,2022,52(1):76-81.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2020-12-11
  • 最后修改日期:2022-02-17
  • 录用日期:2021-02-24
  • 在线发布日期: 2022-02-25
  • 出版日期: 2022-02-28
第十一届航天复合材料成形与加工工艺技术中心交流会 征文通知

关闭