Numerical frameworks for fretting fatigue life analysis: Modeling, validation and experimental comparison. (October 2022)

• Record Type: Journal Article
• Authors: Doca, T.; Loyola, F.M.; Albuquerque, E.L.
• Is Part Of: Theoretical and applied fracture mechanics. Volume 121(2022)
• Publication Date: 2022-10
• Subjects: Fretting fatigue -- Life estimation -- Numerical modeling -- Contact constraints -- BEM -- FEM; Fracture mechanics -- Periodicals; 620.1126
• DOI: 10.1016/j.tafmec.2022.103479
• Languages: English
• ISSNs: 0167-8442

Abstract

Abstract: A comparison of four numerical frameworks employed for the fretting fatigue life estimation of standard metallic specimens is presented. The frictional contact frameworks are: a Node-To-Node contact formulation using the boundary element method, a Node-To-Segment and a Segment-To-Segment contact formulations coupled to the finite element method, and a dual mortar formulation. The analysis procedure, repeated using each framework, is performed in three steps. The first step is the evaluation of the stress history during one loading cycle of a standard fretting fatigue setup which includes normal load, bulk load and shear load. In the second step, a critical plane approach is used to obtain the shear stress amplitude and the maximum normal stress. The final step is to employ a criterion to estimate the fatigue life. Based on previous works, the Fatemi–Socie method is selected. The validation of the stresses computed by the numerical models are carried-out using analytical formulae while the fatigue life estimations are compared to experimental data. A discussion on the performance of each framework is also provided. Highlights: A comprehensive study on fretting fatigue of Al7050-7451 and Ti–6Al–4V is provided. Numerical estimations of stresses and fatigue life using four different frameworks. Analysis of accuracy and computational cost in a controlled simulation environment. Models and results are validated using analytical solutions and experimental data. The requirements for the numerical analysis of fretting fatigue life are discussed.