A Study on the Method of Creep Analysis of the Perforated Plate

A study was made on the method of creep analysis of the perforated plate based on the equivalent solid plate concept. A series of creep analysis by FEM for various materials, ligament efficiencies and loading conditions was performed on the perforated plate with triangular penetration pattern of circular holes. Using the results of this analysis, prediction methods for both creep properties of the equivalent solid plate and local stress-strain concentration were examined. Obtained results are as follows. (1) A prediction method for creep properties of the equivalent solid plate was proposed, which is applicable to wider range of material compared with the conventional method. (2) A practical prediction method for the local stress-strain concentration was proposed, which is basically based on the Neuber's rule together with the Hoff's analogy.