Title: Stress Concentrations of a Sandwich Plate with a Hole or Notch
Abstract: Nowadays, due to the development of the sandwich core series and the higher degree of accuracy required for each thickness of sandwich plate, optimum design of the structural sandwich plate has been needed. We have found several papers relating to the optimum design of the laminated plates, but not for the optimum design of a sandwich plate with a hole or notch. Hereby, this paper presents the characteristics and some example data of the stress concentrations of a sandwich plate with a hole or notch. In analyzing the structural sandwich plate, we apply two bending theories, of which we name one the simple bending theory and the other the advanced bending theory. By using FEM analysis, which is based on these two bending theories, we determine stress concentrations of a sandwich plate, taking into account both the accuracy and cost efficiency of the calculations. We also examine the stress concentrations and raveal the characteristics of the stress concentrations under two types of bending load: anticlastic bending load and cylindrical bending load. To show examples of stress concentrations of a sandwich plate, we use the simple bending theory under the anticlastic bending load.