STRESS CONCENTRATION AND THE OPTIMUM DESIGN OF A SANDWICH PLATE WITH A HOLE OR NOTCH (1ST REPORT).

Nowadays, due to the development of the sandwich core series and the progression of the degree of exactness required for each thickness of sandwich plate, optimum design of the structural sandwich plate has been needed. We can find 2 or 3 papers relating to the optimum design of laminated plates. But this paper presents the optimum design of a sandwich plate with a hole or notch. For this object, we offer the 1st report to investigate the FEM analysis by checking the calculative exactness and cost, and data of the stress concentration wide sphere of dimension.