Modeling fretting fatigue: interface contact conditions based on profilometry data

1999 ◽  
Author(s):  
Perikles D. Nicolaou ◽  
Theodore E. Matikas ◽  
Eric B. Shell
Keyword(s):  
Fretting Fatigue ◽  
Contact Conditions ◽  
Interface Contact

Life Assessment in Fretting Fatigue

2014 ◽  
Vol 618 ◽  
pp. 99-122 ◽  
Author(s):  
Carlos Navarro ◽  
Jesús Vázquez ◽  
Jaime Domínguez
Keyword(s):  
Fatigue Strength ◽  
Detrimental Effect ◽  
Fretting Fatigue ◽  
Life Assessment ◽  
Stress Fields ◽  
Strength Analysis ◽  
Cyclic Loads ◽  
Cyclic Variation ◽  
Contact Conditions ◽  
The Many

Fretting fatigue denotes the detrimental effect on a material arising from the cyclic sliding of two contacting surfaces with small relative displacements between them. One or both of the components in contact may be subject to bulk stresses caused by cyclic loads. The assessment of the fretting fatigue strength and life of any component is a complicated issue due to the many parameters affecting it, the complexity of the stress fields cyclic variation during fretting and the uncertainties associated to the contact conditions. This paper describes some singular aspects of fretting fatigue related to strength analysis and testing, presents a procedure developed by the authors during the last years to estimate the fretting fatigue strength and life and compares the assessment outcomes with the results of tests carried out by different authors.

scholarly journals A Nitsche-based formulation for fluid-structure interactions with contact

2020 ◽  
Vol 54 (2) ◽  
pp. 531-564
Author(s):  
Erik Burman ◽  
Miguel A. Fernández ◽  
Stefan Frei
Keyword(s):  
Contact Surface ◽  
Solid Mechanics ◽  
Contact Problems ◽  
Joint Interface ◽  
Fluid Structure Interactions ◽  
Contact Conditions ◽  
Fluid Structure ◽  
Interface Contact ◽  
Numer Anal ◽  
Fully Eulerian Approach

We derive a Nitsche-based formulation for fluid-structure interaction (FSI) problems with contact. The approach is based on the work of Chouly and Hild (SIAM J. Numer. Anal. 51 (2013) 1295–1307) for contact problems in solid mechanics. We present two numerical approaches, both of them formulating the FSI interface and the contact conditions simultaneously in equation form on a joint interface-contact surface Γ(t). The first approach uses a relaxation of the contact conditions to allow for a small mesh-dependent gap between solid and wall. The second alternative introduces an artificial fluid below the contact surface. The resulting systems of equations can be included in a consistent fashion within a monolithic variational formulation, which prevents the so-called “chattering” phenomenon. To deal with the topology changes in the fluid domain at the time of impact, we use a fully Eulerian approach for the FSI problem. We compare the effect of slip and no-slip interface conditions and study the performance of the method by means of numerical examples.

Fretting Wear and Fretting Fatigue—How Are They Related?

1983 ◽  
Vol 105 (2) ◽  
pp. 230-238 ◽  
Author(s):  
R. C. Bill
Keyword(s):  
Fretting Fatigue ◽  
Surface Treatments ◽  
Fretting Wear ◽  
Experimental Conditions ◽  
Contact Conditions ◽  
Experimental Parameters ◽  
Analogous Manner ◽  
Atmosphere Temperature ◽  
Fatigue Failures

Results from published literature and results obtained by the author are examined in detail to determine how fretting wear and fretting fatigue are related. The effects of various experimental parameters, including slip amplitude, number of fretting cycles, frequency of fretting motion, experimental atmosphere, temperature, and the performance of coatings and surface treatments, are surveyed. All of the results examined indicate that fretting wear and fretting fatigue are influenced in a consistent and analogous manner by controlled variations in experimental conditions. That is, conditions that tend to accelerate fretting wear also accelerate fretting fatigue failures. Correlation of the performance of coatings on material under fretting wear and fretting fatigue conditions is rather tenuous, partly because similar contact conditions for fretting fatigue and fretting wear are not available for very many materials.

scholarly journals Effect of Contact Conditions on Growth of Small Crack in Fretting Fatigue

2012 ◽  
Vol 78 (785) ◽  
pp. 1-13
Author(s):  
Shunsuke KATAOKA ◽  
Hiroaki ONO ◽  
Masanobu KUBOTA ◽  
Yoshiyuki KONDO
Keyword(s):  
Fretting Fatigue ◽  
Small Crack ◽  
Contact Conditions

Fretting Fatigue and Contact Conditions: A Rational Explanation of Palliative Behaviour

1985 ◽  
Vol 199 (4) ◽  
pp. 325-337 ◽  
Author(s):  
T C Chivers ◽  
S C Gordelier
Keyword(s):  
Friction Coefficient ◽  
Fretting Fatigue ◽  
Relative Displacement ◽  
Literature Survey ◽  
Clamping Force ◽  
Contact Conditions ◽  
Tensile Stresses ◽  
Slip Regime ◽  
Rational Explanation ◽  
Complicated Situation

This paper considers what palliative effects can be achieved for fretting fatigue by modifying the contact conditions. A previous literature survey of palliatives by the authors is briefly reviewed to demonstrate the contrary nature of much of the evidence. Two simple geometries (sphere and cylinder on plane) are then considered, and the tensile stresses generated in the wake of the sliding contact derived. It is contended that fretting fatigue is the result of such tensile stresses contributing to the crack initiation process. The effect on these tensile stresses of modifying the contact conditions of the friction coefficient and clamping force is examined, so that successful palliatives can be identified. The analysis shows that conditions exist where increasing or decreasing either the friction coefficient or clamping force can be of benefit, and there is no panacea. The correct action depends on geometry, slip regime and the controlling factor for relative displacement. The analysis therefore provides an explanation of the apparent contradictions in the literature. Suggestions are made for the best approach to ameliorate a fretting fatigue problem, given this complicated situation.

scholarly journals An experimental investigation of fretting fatigue in Ti-6Al-4V: the role of contact conditions and microstructure

2001 ◽  
Vol 32 (5) ◽  
pp. 1131-1146 ◽  
Author(s):  
T. A. Venkatesh ◽  
B. P. Conner ◽  
S. Suresh ◽  
A. E. Giannakopoulos ◽  
T. C. Lindley ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Fretting Fatigue ◽  
Contact Conditions

A Physics-Based Fretting Model With Friction and Integration to a Simple Dynamical System

2011 ◽  
Author(s):  
Melih Eriten ◽  
Andreas A. Polycarpou ◽  
Lawrence A. Bergman
Keyword(s):  
First Principles ◽  
Lap Joints ◽  
Dynamical Response ◽  
Friction Modeling ◽  
Roughness Effects ◽  
Contact Conditions ◽  
Reduced Order ◽  
Interface Contact ◽  
Friction Models ◽  
Simple Dynamical System

Dynamical modeling and simulations of structures containing joint interfaces require reduced-order fretting models for efficiency. The reduced-order models in the literature compromise accuracy and physical basis of the modeling procedure, especially in regards to interface contact and friction modeling. Recently, physics-based fretting models for flat-on-flat contacts, including roughness effects have been developed and tested on individual (isolated) mechanical lap joints [1]. These models follow a “bottom up” modeling approach; utilizing the micromechanics of sphere-on-flat fretting contact (asperity scale), and statistical summation to model flat-on-flat contact (macroscale). Since these models are derived from first principles, the effects of surface roughness, contact conditions, and material properties on fretting and dynamical response of the jointed interfaces can be studied. The present work illustrates an example of how the physics-based models can be incorporated in dynamics of jointed structures. A comparison with the friction models existing in the literature is also provided.

Development of a model for the prediction of the fretting fatigue regimes

2001 ◽  
Vol 16 (9) ◽  
pp. 2716-2723 ◽  
Author(s):  
T. E. Matikas ◽  
P. D. Nicolaou
Keyword(s):  
Fatigue Life ◽  
Research Effort ◽  
Fretting Fatigue ◽  
Partial Slip ◽  
Geometrical Parameters ◽  
Metallic Materials ◽  
Stick Slip ◽  
Contact Conditions ◽  
Contact Materials ◽  
Fatigue Life Reduction

parameters that govern the life of metallic materials under conditions of fretting fatigue may be divided into two broad categories. The first category concerns the material properties (e.g., yield strength, elastic modulus, and surface roughness) while the second concerns the externally imposed loading conditions and contact geometry. The two in-contact materials may either stick, slip, or stick-slip (i.e., there is a slip and a stick region on their interface) against each other. It has been shown that the fatigue life reduction is highest under partial slip. The objective of the present research effort is to develop a model that enables the prediction of the particular fretting fatigue regime (i.e., slip, stick, or mixed). The parameters that affect the fretting fatigue life of metallic components were identified and integrated into a model, which allows the prediction of the interfacial contact conditions. The model was first used to identify the sensitivity of the fretting fatigue regimes upon the materials and external, and geometrical parameters. Experimental results concerned with the fatigue life were plotted on the fretting maps; the fretting fatigue regimes indicated by the latter enabled the interpretation of the experimental data.

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