چکیده
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In this article, the effect of interference fit on fatigue life of holed plate of mechanical joints was
investigated both experimentally and numerically. In the experimental part, fatigue tests were carried
out on the holed specimens of Al 7075-T6 alloy in which oversized steel pins were force fitted to them.
These fatigue tests were conducted on open hole specimen and specimens with 1, 1.5, 2 and 4% nominal
interference fit sizes at different cyclic longitudinal loads. From these tests the stress-life (S–N) data for
different interference fit sizes were obtained. The results show that interference fit increases fatigue life
compared to open hole specimens. In the numerical part of the investigation, 3D finite element simulations have been performed to obtain stress (or strain) histories and distributions around the hole due to
interference fit and subsequent cyclic longitudinal loading using FEM package. The stress history from
finite element (FE) simulation was used to explain the reason for fatigue life improvement in the
interference fitted specimens.
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