Modeling interfacial conditions in nominally flat contacts for application to fretting fatigue of turbine engine components

Fretting fatigue tests on shrink-fit specimens and investigations into the strength enhancement induced by deep rolling

“…This problem can be solved after fixing one side of the contact bridge to the rigid part of the testing frame. This solution has been reported by McVeigh et al [1], Rossino et al [19], Araújo et al [20], Lykins et al [21,22], Szolwinski and Farris [23], and others. The contact configuration of bridge type testing may be Hertzian, cylindrical to flat [24,25,23], or even sphere to flat [26], while sharp complete contacts without rounded corners have recently been proposed by Hojjati-Talemi et al [27], Giner et al [28] and Noraphaiphipaksa et al [29].…”

“…Examples of fretting fatigue include the dovetail interface of turbomachinery [1][2][3][4] and the shrink-fit (tubular or cylindrical) connection [5][6][7][8][9][10][11]. Fretting testing is essential in designing admissible loads and also to validate different modelling approaches.…”

An investigation of fretting fatigue in a circular arc dovetail assembly

“…The difficultly may stem from the high stress magnitudes as well as the contact nonlinearities. Although analytical and quasi-analytical formulas based on the Hertzian solution [8] can be used to calculate the contact stresses for some specific contact geometries [9,10], due to the complexities of geometries and loading conditions, finite element method (FEM) is the most widely used approach in industry, but it is often essential to perform a verification analysis to examine the convergence of contact stresses when using FEM. Sinclair et al [11] systematically analyzed the contact stresses in a dovetail assembly.…”

Cyclic plastic behavior of dovetail under fretting load

“…Obviously, the solution of high gradient stress is the basis of fretting fatigue failure analysis, and it is a challenge to solve the contact stress accurately under complex loading history. The analytical and quasi-analytical formulas based on Hertz contact solution are used to solve the contact stress [4][5][6], and related codes CAPRI [7] and CAFDEM [8] were developed. It is often essential to carry out verification analysis for these formulas when using FEM [9].…”