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Equivalent CTOD concept based on the local approach and its application to fracture performance evaluation of welded joints; Local approach ni motozuku toka CTOD gainen no teian to tsugite hakai seino hyoka eno oyo

Abstract

A proposal was given on an equivalent crack tip opening displacement (CTOD) concept which relates quantitatively fracture performance of a structural member with the result of a three-point bending CTOD test via the Weibull stress based on a local approach. The equivalent CTOD is defined as a CTOD in which a three-point CTOD test piece and a structural member provide the same Weibull stress. Experimental and analytical discussions were performed on X80 steel welded joints. Effectiveness of the equivalent CTOD concept was verified from the fact that the fracture performance in welded joints with a large width estimated from the result of the three-point bending CTOD test using the equivalent CTOD concept showed good correspondence with the fracture performance obtained in the experiments. On the other hand, the result of estimation using the conventional CTOD concept is considerably smaller than measurements. As an application of the equivalent CTOD concept, a new determination procedure was introduced on required fracture tenacity to ensure deformation performance required on structural elements. The required CTOD value shows a trend that the smaller the ratio of yield stress of the welded metals to that in the base material, the greater the required CTOD grows. 16 refs.,  More>>
Authors:
Ohata, M; Minami, F; Toyoda, M; [1]  Tanaka, T; Arimochi, K; [2]  Glover, A; [3]  North, T [4] 
  1. Osaka University, Osaka (Japan). Faculty of Engineering
  2. Sumitomo Metal Industries, Ltd., Osaka (Japan)
  3. Nova Gas Transmission Ltd., Calgary (Canada)
  4. University of Toronto (Canada)
Publication Date:
Dec 31, 1996
Product Type:
Miscellaneous
Report Number:
ETDE/JP-mf-97721531
Reference Number:
SCA: 360103; 420204; 420500; PA: NEDO-96:913863; EDB-97:014895; SN: 97001718549
Resource Relation:
Other Information: PBD: Spr 1996; Related Information: Is Part Of Proceedings of the Spring Meeting of the Society of Naval Architects of Japan (1996). Part 2. Structure, materials, welding, construction, and design; PB: 219 p.; Nihon zosen gakkai (1996 nen) shunki koen ronbun maezuri. 2. Kozo, zairyo, yosetsu, kosaku, sekkei
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; DISPLACEMENT RATES; OPENINGS; CRACKS; FRACTURE PROPERTIES; WELDED JOINTS; EVALUATION; MECHANICAL PROPERTIES; ULTIMATE STRENGTH; DESTRUCTIVE TESTING
OSTI ID:
414216
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97721531; TRN: 96:913863
Availability:
Available from The Society of Naval Architects of Japan, 15-16, Toranomon 1-chome, Minato-ku, Tokyo, Japan; OSTI as DE97721531
Submitting Site:
NEDO
Size:
pp. 379-387
Announcement Date:

Citation Formats

Ohata, M, Minami, F, Toyoda, M, Tanaka, T, Arimochi, K, Glover, A, and North, T. Equivalent CTOD concept based on the local approach and its application to fracture performance evaluation of welded joints; Local approach ni motozuku toka CTOD gainen no teian to tsugite hakai seino hyoka eno oyo. Japan: N. p., 1996. Web.
Ohata, M, Minami, F, Toyoda, M, Tanaka, T, Arimochi, K, Glover, A, & North, T. Equivalent CTOD concept based on the local approach and its application to fracture performance evaluation of welded joints; Local approach ni motozuku toka CTOD gainen no teian to tsugite hakai seino hyoka eno oyo. Japan.
Ohata, M, Minami, F, Toyoda, M, Tanaka, T, Arimochi, K, Glover, A, and North, T. 1996. "Equivalent CTOD concept based on the local approach and its application to fracture performance evaluation of welded joints; Local approach ni motozuku toka CTOD gainen no teian to tsugite hakai seino hyoka eno oyo." Japan.
@misc{etde_414216,
title = {Equivalent CTOD concept based on the local approach and its application to fracture performance evaluation of welded joints; Local approach ni motozuku toka CTOD gainen no teian to tsugite hakai seino hyoka eno oyo}
author = {Ohata, M, Minami, F, Toyoda, M, Tanaka, T, Arimochi, K, Glover, A, and North, T}
abstractNote = {A proposal was given on an equivalent crack tip opening displacement (CTOD) concept which relates quantitatively fracture performance of a structural member with the result of a three-point bending CTOD test via the Weibull stress based on a local approach. The equivalent CTOD is defined as a CTOD in which a three-point CTOD test piece and a structural member provide the same Weibull stress. Experimental and analytical discussions were performed on X80 steel welded joints. Effectiveness of the equivalent CTOD concept was verified from the fact that the fracture performance in welded joints with a large width estimated from the result of the three-point bending CTOD test using the equivalent CTOD concept showed good correspondence with the fracture performance obtained in the experiments. On the other hand, the result of estimation using the conventional CTOD concept is considerably smaller than measurements. As an application of the equivalent CTOD concept, a new determination procedure was introduced on required fracture tenacity to ensure deformation performance required on structural elements. The required CTOD value shows a trend that the smaller the ratio of yield stress of the welded metals to that in the base material, the greater the required CTOD grows. 16 refs., 19 figs., 3 tabs.}
place = {Japan}
year = {1996}
month = {Dec}
}