Finite Element Simulations Of
Fretting Contact Systems
Author(s)
G. Shi, D. Backman & N. Bellinger
Abstract
This paper presents the results of finite element simulations of contact stresses in
fretting fatigue tests. Finite element models were developed using MSC/MARC
finite element software. Convergence studies with different mesh configurations
were carried out to verify the model by comparing the results with theoretical
solutions. To further validate the FE model, simple coupon tests were carried
out. Both photoelastic and pressure film measurements were taken during these
tests and the experimental test data was compared with the FE results. After the
FE model was verified, various simulations were carried out to quantify the
effect of varying the applied normal load. The stress distributions including
normal, shear tractions and tangential stress were determined and compared with
analytical solutions in four different load cases. The obtained FE results showed
that the combination of the normal, shear and bulk forces have significant effects
on the contact traction and stress distributions.
Keywords: fretting contact, finite element simulation, contact tractions and
stress, photoelasticity, pressure film, experimental stress analysis.
1 Introduction
Fretting can occur between two tight fitting surfaces that are subjected to small
amplitude cyclic loads when there is relative motion between the two surfaces.
These fretted regions are highly sensitive to fatigue cracking and this kind of
damage has been observed between the faying surfaces in riveted lap joints, and
is considered a crack nucleation mechanism. Due to the concerns for aircraft
safety and integrity, a great deal of research has been carried out to determine the
nature of fretting fatigue [1-9].
Keywords
fretting contact, finite element simulation, contact tractions and
stress, photoelasticity, pressure film, experimental stress analysis.
Related Book
Other papers in this volume
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