Volume 45, Issue 9 pp. 2499-2515
ORIGINAL ARTICLE

A double-clipping method to achieve the fatigue damage equivalence between uniaxial and triaxial random vibrations

Jin Bai

Jin Bai

School of Mechano-electronic Engineering, Xidian University, Xi'an, China

Contribution: Methodology, Formal analysis, Writing - original draft, Conceptualization, Supervision, Validation

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Yuanying Qiu

Corresponding Author

Yuanying Qiu

School of Mechano-electronic Engineering, Xidian University, Xi'an, China

Correspondence

Yuanying Qiu and Jing Li, School of Mechano-electronic Engineering, Xidian University, Xi'an 710071, China.

Email: [email protected] and

Email: [email protected]

Contribution: Methodology, Formal analysis, Supervision, Writing - review & editing, Validation

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Jing Li

Corresponding Author

Jing Li

School of Mechano-electronic Engineering, Xidian University, Xi'an, China

Correspondence

Yuanying Qiu and Jing Li, School of Mechano-electronic Engineering, Xidian University, Xi'an 710071, China.

Email: [email protected] and

Email: [email protected]

Contribution: Methodology, Formal analysis, Supervision, Validation

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Haidong Wang

Haidong Wang

Shanghai Spaceflight Precision Machinery Research Institute, Shanghai, China

Contribution: ​Investigation, Validation

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Zhaoxi Wang

Zhaoxi Wang

Shanghai Spaceflight Precision Machinery Research Institute, Shanghai, China

Contribution: ​Investigation, Validation

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First published: 07 June 2022
Citations: 1

Funding information: Technical Basic Research Project of China Aerospace Science and Technology Corporation, Grant/Award Number: JSZL2017203C012; Innovation Fund of Xidian University; Fundamental Research Funds for the Central Universities

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.

CONFLICT OF INTEREST

The authors declared that they have no conflicts of interest to this work.

DATA AVAILABILITY STATEMENT

Research data are not shared.

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