 Physics of failure as a basis for solder elements reliability assessment in wind turbinesErik E. Kostandyan and Sørensen, John D. Reliability Engineering and System Safety, 2012, vol. 108, issue C, 100-107 Abstract: Traditionally assessment of reliability of electrical components is done by classical reliability techniques using failure rates as the basic measure of reliability. In this paper a structural reliability approach is applied in order to include all relevant uncertainties and to give a more detailed description of the reliability. A physics of failure approach is applied. A SnAg solder component used in power electronics is used as an example. Crack propagation in the SnAg solder is modeled and a model to assess the accumulated plastic strain is proposed based on a physics of failure approach. Based on the proposed model it is described how to find the accumulated linear damage and reliability levels for a given temperature loading profile. Using structural reliability methods the reliability levels of the electrical components are assessed by introducing scale factors for stresses. Keywords: Wind turbine reliability; IGBT damage model; SnAg solders fatigue and damage model; Physics of failure approach; Thermal aging; Structural reliability application (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:108:y:2012:i:c:p:100-107 DOI: 10.1016/j.ress.2012.06.020 Access Statistics for this article Reliability Engineering and System Safety is currently edited by Carlos Guedes Soares More articles in Reliability Engineering and System Safety from Elsevier |
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