Hot Spot Stress Analysis of a Fatigue Specimen Using Finite Element Method

摘要

DREA is a member of the International Ship Offshore Structure Congress (ISSC) andcurrently participates in two of the technical committees (II.1 and III.1). It is recognized that the accuracy of the stress results of a finite element analysis has significant effect in the fatigue life prediction of the structure. Participants of the committee II.1 (the quasi static load effects) have agreed to perform a finite element comparative study. The emphasis of the study is on hot spot stress analysis in which the stress results can he used to determine the fatigue life and the stress concentration factor. In order to draw a quantitative conclusion, a stiffened plate, tested in Japan, was selected to be the subject of this study. Participants were asked to use their own solution procedures and modeling techniques independently. After presenting the background information on hot spot stress analysis in fatigue life prediction and a brief description of the specimen, this memorandum summarizes the finite element model and the solution procedure used by DREA. Numerical results obtained with the finite element method and analytical results from simple beam theory are presented and discussed.