Reliability estimation for aluminum alloy welded joint with automatic image measurement of surface crack growth
Reliability estimation for aluminum alloy welded joint with automatic image measurement of surface crack growth
复制标题
DOI：
10.1108/ec-04-2015-0092
复制
发表时间：
2016-05
影响因子：
1.6
通讯作者：
Qi Peng;Tianyu Liu;Quan Sun;Wenwei Huang
中科院分区：
文献类型：
--
作者：
Qi Peng;Tianyu Liu;Quan Sun;Wenwei Huang
用途——铝合金焊接接头作为重要的连接部件，其可靠性影响着设备整体结构的有效性和稳定性。提出了一种基于裂纹扩展图像自动测量的时变维纳过程的焊接接头可靠性估计方法。将焊接接头裂纹长度信息纳入可靠性分析，以反映产品时变特性。设计/方法/方法-所提出的方法优于其他裂纹扩展估计，因为它创新地引入了一种非接触和灵活的摄影测量技术。首先，利用所设计的监测系统在线获取铝合金焊接接头裂纹扩展图像。其次，利用图像测量方法计算裂纹长度，得到裂纹在制造过程中的扩展数据；最后，采用时变维纳过程对降解过程进行建模。
Purpose – As an important connecting component, the reliability of aluminium alloy welded joints influences the whole structural effectiveness and stability of equipment. The purpose of this paper is to propose a novel reliability estimation approach to the welded joints based on time-transformed Wiener process with automatic image measurement of crack growth. The crack length information of the welded joints is incorporated into reliability analysis to reflect the product time-varying characteristics. Design/methodology/approach – The proposed approach is superior to other crack growth estimations in that it innovatively introduce a non-contact and flexible photogrammetry technique.First, on-line crack growth images of aluminium alloy welded joints are acquired by the designed monitor system. Second, crack length is calculated with image measurement, then the crack growth data during the manufacturing process is prepared. Finally, a time-transformed Wiener process is used to modeling the degradation, and...