An Investigation of Elastic Buckling for Perforated Plates In Aircraft Structure
Engineering and Technology Journal,
2007, Volume 25, Issue 5, Pages 179-197
AbstractThe present work performs mechanical buckling analyses on square
and rectangular plates with central cutouts under uniaxial compressive load.
The cutouts were either circular or square holes. The material of plates was
the widely used in aircraft structures i.e. Al-2024 T3 aluminum alloy. The
finite element structure analysis technique was used to study the effects of
plate support conditions, plate aspect ratio , hole geometry, and hole shape on
the buckling characteristics of the perforated plates. The well- known finite
element structural ANSYS program was used to perform the calculations.
Square plates with circular and square cutouts showed decays in buckling
strengths as the hole sizes were increased. On the other hand , rectangular
plates unexpectedly exhibited an anomalous behavior when their buckling
strengths enhanced as the holes were enlarged. The plate buckling mode
shape could be symmetrical or anti-symmetrical, depending on the plate
boundary conditions, aspect ratio and the hole size. For the same cutouts
areas, the buckling strengths of the same sized plates with square holes,slightly, overcome those of the plates with circular holes for moderate hole
sizes. The buckling strengths of the latter cases, however, surpass those of the
former cases when holes are large.
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