Elasto-Plastic Analysis of Clamped Circular Plates with Central Circular Holes using HOSDT for Different Radius to Thickness Ratios

The present study is implementation of a finite element formulation for elasto-plastic analysis of clamped circular plates by using higher-order shear deformation theory. In this formulation variation of transverse shear strain is taken into account for incremental elasto-plastic plate bending analysis. Parametric studies over clamped circular plates with and without circular holes having different radius to thickness ratios, holes sizes etc. was conducted. The thickness of plate doesn't affect the normalised collapse load which endorses the correctness of normalisation parameter chosen. However a little increase in normalised collapse load was observed in case of thin plates. This may be due to stretching effect which comes into play along-with bending in case of thin plates while only bending effect is seen in case of thick plates.