Оценка влияния обжатия отверстий обшивки летательных аппаратов на прочность

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К.А. Валуев, А.С. Чернятин
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Evaluation of the effect of compression of the holes of the
cladding of aircrafts on strength
© K.A. Valuev, A.S. Chernyatin
Bauman Moscow State Technical University, Moscow, 105005, Russia
The article analyzes the impact of the holes compression process in the riveted joint in
the sheathing of aircraft on the strength. Optimal amount of compression at which the
generated residual stress field leads to a significant reduction of stress at operating loads
is determined. For this purpose, using ANSYS Workbench we created a parametric finite
element model of an uniaxial loaded plate (plating) with central hole, i.e. compression
spherical stamp. This model provides a comprehensive study of stress-strain state in the
vicinity of the hole. Comparative calculations of the plate without any preliminary
compression of the hole and with compression showed that at certain level of
compression we can achieve reduction of maximum stresses. The work also shows the
influence of the radius on the stamp.
Keywords: stamping, elastoplastic material deformation, contact problem, stress strain
state, residual stress, safety factor.
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