Creep-integrated fatigue equation for metals
| Autor: | Ee Hua Wong, Dan Liu, Dirk J. Pons |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy 02 engineering and technology Mechanics Creep fatigue 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Physics::Geophysics Computer Science::Robotics 020303 mechanical engineering & transports 0203 mechanical engineering Creep Mechanics of Materials Condensed Matter::Superconductivity Modeling and Simulation Soldering Range (statistics) General Materials Science 0210 nano-technology Representation (mathematics) |
| Zdroj: | International Journal of Fatigue. 98:167-175 |
| ISSN: | 0142-1123 |
| DOI: | 10.1016/j.ijfatigue.2016.11.030 |
| Popis: | Background The existing creep-fatigue models are valid over limited ranges of temperatures and frequencies. Need There is a need to develop a creep-fatigue equation that covers the full range of phenomena from pure fatigue to pure creep rupture, and all the intermediate failures. Method By integrating the Manson-Haferd parameter into the Coffin-Manson equation, the creep-integrated fatigue equation is developed and further is validated on three metal alloys: 63Sn37Pb solder, Sn3.5Ag solder and stainless steel 316. Results This new formulation collapses the dispersed strain-life data of the alloys obtained at diverse temperatures and cycle times into a cohesive strain-life formulaic representation. Supported by this result, the method of establishing the material parameters for the creep-integrated fatigue equation is demonstrated. Originality The resulting equation is capable of modelling the full range of creep-fatigue interaction from pure fatigue to pure creep rupture, and the combinations thereof. A method is provided to determine the coefficients. |
| Databáze: | OpenAIRE |
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