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.
Originalsprog | Engelsk |
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Tidsskrift | Reliability Engineering & System Safety |
Vol/bind | 108 |
Udgave nummer | December 2012 |
Sider (fra-til) | 100–107 |
Antal sider | 8 |
ISSN | 0951-8320 |
DOI | |
Status | Udgivet - 2012 |
Emneord
- Wind Turbine Reliability
- IGBT Damage Model
- SnAg Solders Fatigue and Damage Model
- Physics of Failure Approach
- Thermal Aging
- Structural Reliability Application