Title:
METHOD OF ASSESSING FRACTURES, FRACTURE ASSESSMENT DEVICE, PROGRAM AND COMPUTER READABLE RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2011/126058
Kind Code:
A1
Abstract:
In a method of assessing fractures in a metal structure, when the portion for fracture assessment has been returned from a plastic state to an elastic state, if the stress when the portion for fracture assessment is returned to the elastic state is defined as (x, y) = (σ2, σ1) (maximum principal stress: σ1, minimum principal stress: σ2) in the (x, y) coordinate plane, the fracture assessment is performed by using a re-yield stress (R) which is determined by the intersection between a straight line that satisfies the relationship y = (σ1 / σ2) x and the yield curve obtained from the plastic state of the portion for fracture assessment. Even when the portion for fracture assessment has been returned from a plastic state to an elastic state, the fracture assessment can be performed with great accuracy.
Inventors:
HIWATASHI, Shunji (6-1 MARUNOUCHI 2-CHOME, CHIYODA-K, Tokyo 71, 〒1008071, JP)
樋渡 俊二 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
樋渡 俊二 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
Application Number:
JP2011/058739
Publication Date:
October 13, 2011
Filing Date:
April 06, 2011
Export Citation:
Assignee:
NIPPON STEEL CORPORATION (6-1 MARUNOUCHI 2-CHOME, CHIYODA-KU Tokyo, 71, 〒1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区丸の内二丁目６番１号 Tokyo, 〒1008071, JP)
HIWATASHI, Shunji (6-1 MARUNOUCHI 2-CHOME, CHIYODA-K, Tokyo 71, 〒1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区丸の内二丁目６番１号 Tokyo, 〒1008071, JP)
HIWATASHI, Shunji (6-1 MARUNOUCHI 2-CHOME, CHIYODA-K, Tokyo 71, 〒1008071, JP)
International Classes:
G01N3/00; B21D22/00
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (5th Floor, NBF Ikebukuro City Building 17-8, Higashi-Ikebukuro 1-chome, Toshima-k, Tokyo 13, 〒1700013, JP)
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Claims: