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A fatigue and low-energy shock-based approach to predict fatigue life

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Abstract

A product that is characterized by fatigue-induced failure always suffers from complex fatigue loads, and the damage caused by fatigue loads accumulates with time. The existence of shocks not only directly increases the risk of failure but also affects the magnitude of damage caused by fatigue loads. This study analyzes the reliability of a product when fatigue loads and shocks are both involved. The features of fatigue damage and shock damage are investigated, and the coupling relationship between them is discussed. With assumptions of high cycle fatigue and low-energy shocks, the effect of shocks on fatigue damage is expressed as the degradation of the ultimate strength of the product. An overall reliability model with fatigue and shock failures is developed. Two conditions are considered for the reliability model: shocks with fixed period and shocks with a homogeneous Poisson process. Three important cumulative damage theories are adopted. An engineering case of actuator cylinder is provided to demonstrate the proposed approach.

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Author information

Authors and Affiliations

  1. School of Reliability and Systems Engineering, Beihang University, Beijing, China

    Hongxia Chen & Yunxia Chen

  2. Beijing University of Aeronautics and Astronautics, Beijing, 100191, China

    Yi Yang

  3. China Astronaut Research and Training Center, Beijing, 100094, PR China

    Yi Yang

Authors
  1. Hongxia Chen
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  2. Yunxia Chen
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  3. Yi Yang
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Corresponding author

Correspondence to Yunxia Chen.

Additional information

Hongxia Chen was born in 1989. She received her B.S. degree in information and computer science from Minzu University of China in 2011. She is currently a postgraduate student at the School of Reliability and Systems Engineering, Beihang University (BUAA). Her primary research interests are system reliability design, health management, and reliability analysis technology. Her research focuses on reliability and life modeling and reliability experiment technology.

Yunxia Chen was born in 1977. She obtained her Ph.D. from BUAA in 2004. She is currently a professor at the School of Reliability and Systems Engineering, Beihang University. Her main research focuses on reliability design and experiment technology based on the physics of failure. She has developed 2 courses and has published 2 books and more than 50 research papers. She plans to investigate the reliability modeling techniques of complex systems and high-reliability and long-life products in the future.

Yi Yang was born in 1978. She has been working with the China Astronaut Research and Training Center for five years now. She is currently engaged in postdoctoral research at the School of Reliability and Systems Engineering, BUAA. She received her M.S. degree from Maintenance Engineering Institute, Ordnance Engineering College, in 2005. She obtained her Ph.D. from the School of Automation, Nanjing University of Science and Technology, in 2008. Her main research interests are reliability analysis and design, repairable systems modeling, and instantaneous availability.

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Chen, H., Chen, Y. & Yang, Y. A fatigue and low-energy shock-based approach to predict fatigue life. J MECH SCI TECHNOL 28, 3977–3984 (2014). https://doi.org/10.1007/s12206-014-0909-5

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  • DOI: https://doi.org/10.1007/s12206-014-0909-5

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