Verfahren, Vorrichtung und Programm zur Vorhersage von Verzögertem Bruch in einem Pressgeformten Artikel und Verfahren zur Herstellung eines Pressgeformten Artikels

Details

Veröffentlichungs-Nr.

EP4752522

Anmeldetag

25. Juni 2024

Veröffentlichung

27. März 2025

Rechtsraum

EP

IPC

G01N3/00, B21D22/00, G01N17/00

Abstract

A method for predicting delayed fracture in a press formed part according to the present invention includes: calculating a stress distribution and a strain distribution in a press formed part (S1); calculating a stress gradient in a direction of crack propagation due to delayed fracture at a delayed fracture portion-of-concern in the press formed part (S3); setting a hydrogen concentration distribution corresponding to the strain distribution in the press formed part (S5); performing hydrogen diffusion analysis on the press formed part based on the stress distribution and the hydrogen concentration distribution to calculate a hydrogen concentration distribution after hydrogen diffusion (S7); and predicting whether delayed fracture will occur at the delayed fracture portion-of-concern based on delayed fracture determination conditions based on stress, strain, and hydrogen concentration at the stress gradient, and stress, strain, and hydrogen concentration at the delayed fracture portion-of-concern (S9).

Anmelder

Firma

JFE Steel Corporation

Land

🇯🇵 Japan