A double‐clipping method to achieve the fatigue damage equivalence between uniaxial and triaxial random vibrations. Issue 9 (7th June 2022)

• Record Type: Journal Article
• Authors: Bai, Jin; Qiu, Yuanying; Li, Jing; Wang, Haidong; Wang, Zhaoxi
• Is Part Of: Fatigue & fracture of engineering materials & structures. Volume 45:Issue 9(2022)
• Page Start: 2499
• Page End: 2515
• Publication Date: 2022-06-07
• Subjects: equivalent clipping -- fatigue damage -- strength failure -- triaxial random vibration; Materials -- Fatigue -- Periodicals; Fracture mechanics -- Periodicals; 620.1123
• DOI: 10.1111/ffe.13761
• Languages: English
• ISSNs: 8756-758X

Abstract

Abstract: In this paper, a double‐clipping method dealing with both load spectrum and test time is proposed for fatigue damage equivalence between uniaxial and triaxial random vibrations. The load spectrum is clipped appropriately to avoid strength failure because of triaxial over‐testing by defining the stress margin. The test time is clipped and three criteria for selecting the key equivalent points are presented to achieve fatigue damage equivalence of important components between uniaxial and triaxial random vibrations. The proposed method is verified through a notched specimen and a printed circuit board (PCB), respectively, showing that the double‐clipping method not only avoids over‐testing and saves test time but also provides a valuable reference for formulating triaxial random vibration test standards. Highlights: A double‐clipping method is proposed to provide a valuable reference for supplementing the triaxial test standard. Three selection criteria for equivalent component are designed. The clippings on test time and load spectrum are shown through two examples.