Even small geometric imperfections, such as out-of-plane deformation or waviness, can significantly affect the instability resistance of a plate and lead to buckling and collapse of the structure under an external load. Out-of-plane geometric imperfections can create local deformation or warping, which increases the compressive stress on the plate. This increased stress can exceed the critical limit required to trigger instability, leading to structure failure.
To ensure stability and prevent collapse, it is crucial to consider and control geometric imperfections during the structure design and fabrication phases.
Analytical calculations or Finite Element Analysis (FEA) can be used during the design phase to predict the effect of imperfections on the stability of the structure. Regular inspections during the service life of the structure can also help to identify and address any potential geometric imperfections, thereby ensuring long-term stability and safety.