Title:
METHOD FOR DETERMINING DESIGN SPECIFICATION OF STEEL PIPE FOR HOLLOW MEMBER, DESIGN DEVICE FOR THE STEEL PIPE FOR THE HOLLOW MEMBER, AND METHOD FOR MANUFACTURING THE STEEL PIPE FOR THE HOLLOW MEMBER
Document Type and Number:
Japanese Patent JP2022091253
Kind Code:
A
Abstract:
To provide a method for determining a design specification of a steel pipe for a hollow member that satisfies fatigue life required according to component design.SOLUTION: A method for determining a design specification of a steel pipe for a hollow member includes: a prediction stage of predicting a stress state at the time of use of the hollow member based on a design load and a design shape of the hollow member to obtain predicted fatigue life of the hollow member based on the stress state, a steel component of the steel pipe for the hollow member, heat treatment conditions, and an inner surface shape and the design shape of the hollow member; a comparison stage of comparing the predicted fatigue life of the hollow member with required fatigue life; and a decision stage of determining whether or not the predicted fatigue life is equal to or more than the required fatigue life to decide the steel component, the heat treatment conditions, the inner surface shape and the design shape used for predicting the predicted fatigue life as a design specification of the steel pipe for the hollow member when the predicted fatigue life is equal to or more than the required fatigue life. When the predicted fatigue life is determined to be less than the required fatigue life, the method for determining the design specification of the steel pipe for the hollow member performs the prediction stage, the comparison stage, and the decision stage by changing one or two or more of the steel component, the heat treatment conditions, the inner surface shape, and the design shape.SELECTED DRAWING: Figure 2
Inventors:
NAGATA YUKINOBU
MOTEGI YUKI
MOTEGI YUKI
Application Number:
JP2020203969A
Publication Date:
June 21, 2022
Filing Date:
December 09, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
G06F30/10; B21B19/04; B21C37/08; C21D9/08; C21D9/50; G01N3/06; G06F30/20
Attorney, Agent or Firm:
Sumio Tanai
Mitsuo Teramoto
Tomomasa Katsumata
Hiroshi Yamaguchi
Mitsuo Teramoto
Tomomasa Katsumata
Hiroshi Yamaguchi