Limitations of the Coulomb friction assumption in fretting fatigue analysis
| Autor: | Ted Nicholas, Sam Naboulsi |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Constant coefficients
Work (thermodynamics) Materials science Applied Mathematics Mechanical Engineering Contact geometry Mechanical engineering Fretting Slip (materials science) Mechanics Condensed Matter Physics Stress (mechanics) Mechanics of Materials Modeling and Simulation Coulomb General Materials Science Constant (mathematics) |
| Zdroj: | International Journal of Solids and Structures. 40:6497-6512 |
| ISSN: | 0020-7683 |
| Popis: | A significant factor in the fretting process, both experimentally and analytically, is the Coulomb friction. Most analyses of fretting fatigue consider a constant coefficient of friction (CCOF) in modeling a contact geometry. This work reevaluates the constant assumption of the Coulomb friction coefficient, and develops a Coulomb friction model based on a non-classical model allowing the coefficient of friction (COF) to be a function of local contact pressure and local slip magnitude. Here, the Coulomb COF varies locally along the contact surface. Results of computations using this model are applied to fretting fatigue experiments utilizing several specific contact geometries, which have nominally identical fatigue lives experimentally. The analysis shows that certain combinations of parameters in the variable coefficient of friction model can produce nominally identical stress states. Such results cannot be obtained using a CCOF. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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