METHOD AND APPARATUS FOR JUDGING ULTIMATE STRENGTH REDUCTION IN CHANNEL BOLTED CONNECTION WITH CURLING

摘要

The present invention relates to a method and an apparatus for judging ultimate strength reduction with curling for an austenite type stainless steel ��shaped bolt connection part capable of predicting the ultimate strength reduction with curling and capable of predicting the ultimate strength and the curling according to a weight direction edge distance in the ��shaped bolt connection part of the austenite type stainless steel (STS304) using a limited element interpretation method. According to the present invention, the determination method of the ultimate strength with the curling of the bolt connection unit comprises a first step of constructing the limited element interpretation model of the bolt connection unit; a second step of inputting variable for the limited element interpretation model constructed in the first step; a third step of executing a modeling process for the limited element interpretation model constructed based on the inputted variable; a fourth step of outputting a result value modeled in the third step; and a fifth step of determining the reduction of the ultimate strength based on the result value. [Reference numerals] (AA) START; (BB) NO; (CC) YES; (DD) END; (S101) Finite element analysis model construction of a ��shaped bolt connection part; (S102) Inputting main variables; (S103) Executing modeling for an analysis model; (S104) Outputting a modeling result value; (S105) Is a surface conversion phenomenon occurred?; (S106) Determining Maximum strength reduction with the rate of P_ua and P_uaR