|
Abstract
|
In this paper, effects of two co-axial defense holes on stress concentration factor (SCF) of a circular hole in a
rectangular plate under uniaxial tension have been investigated by finite element method. For different
geometrical parameters of defense holes such as, diameter (d) and distance of defense holes from the central
hole (CC), SCF has been investigated. It has been concluded that defense holes can affect SCF of the circular
hole in different manners, and it depends on CC and also diameter of defense holes. When defense holes are far
from the central hole, SCF of the central hole and defense holes are affected very little. However, when defense
holes get closer to the central hole, their effect on SCF of the central hole increases. Moreover, bigger defense
holes have more effect on SCF of the central hole than smaller ones. Over all, defense holes, which are smaller
than the central hole, conversely increase SCF of the central hole instead of decreasing it at a specific CC/D.
|