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Study on unified fatigue strength assessment method for welded structure. Hot spot stress evaluating method for various combinations of plate thickness and weld leg length; Yosetsu kozo no toitsutekina hiro kyodo hyokaho ni kansuru kenkyu. Itaatsu to yosetsu ashinaga no kumiawase ni taisuru hot spot oryoku sanshutsu ni tsuite

Abstract

There has been tried to apply unified assessment method using hot spot stress, which is effective to evaluate fatigue strength of fillet welded structures for ships and marine structures. This method can be applied to complicated structures and is independent of welding processes. In this study, first, stress analysis has been conducted for two-dimensional fillet welded joint models with various combinations of plate thickness and weld leg length of general fillet structures by means of boundary element method. Then, critical position, which is not affected by local stress concentration due to bead, was determined from the detailed stress distribution in the vicinity of weld toe. As a result, a general equation has been proposed to estimate the hot spot stress by one-point representative method. Second, the fatigue tests of typical fillet welded joints have been conducted by applying this method. Consequently, it was demonstrated that the unified fatigue strength can be evaluated by the S-N data based on hot spot stress range determined from the proposed equation, independent of structural stress concentration. 22 refs., 14 figs.
Authors:
Nihei, K; Inamura, F; Koe, S [1] 
  1. Kawasaki Heavy Industries, Ltd., Kobe (Japan)
Publication Date:
Dec 31, 1996
Product Type:
Miscellaneous
Report Number:
ETDE/JP-mf-97721531
Reference Number:
SCA: 360103; 420500; 990200; PA: NEDO-96:913867; EDB-97:014900; SN: 97001718553
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; 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; MECHANICAL STRUCTURES; WELDED JOINTS; FATIGUE; PLATES; STEELS; THICKNESS; WELDING; LENGTH; BOUNDARY ELEMENT METHOD; STRESS ANALYSIS; STRESS INTENSITY FACTORS; HOT SPOTS; S-N DIAGRAM; HEAT AFFECTED ZONE
OSTI ID:
414220
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97721531; TRN: 96:913867
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. 425-432
Announcement Date:

Citation Formats

Nihei, K, Inamura, F, and Koe, S. Study on unified fatigue strength assessment method for welded structure. Hot spot stress evaluating method for various combinations of plate thickness and weld leg length; Yosetsu kozo no toitsutekina hiro kyodo hyokaho ni kansuru kenkyu. Itaatsu to yosetsu ashinaga no kumiawase ni taisuru hot spot oryoku sanshutsu ni tsuite. Japan: N. p., 1996. Web.
Nihei, K, Inamura, F, & Koe, S. Study on unified fatigue strength assessment method for welded structure. Hot spot stress evaluating method for various combinations of plate thickness and weld leg length; Yosetsu kozo no toitsutekina hiro kyodo hyokaho ni kansuru kenkyu. Itaatsu to yosetsu ashinaga no kumiawase ni taisuru hot spot oryoku sanshutsu ni tsuite. Japan.
Nihei, K, Inamura, F, and Koe, S. 1996. "Study on unified fatigue strength assessment method for welded structure. Hot spot stress evaluating method for various combinations of plate thickness and weld leg length; Yosetsu kozo no toitsutekina hiro kyodo hyokaho ni kansuru kenkyu. Itaatsu to yosetsu ashinaga no kumiawase ni taisuru hot spot oryoku sanshutsu ni tsuite." Japan.
@misc{etde_414220,
title = {Study on unified fatigue strength assessment method for welded structure. Hot spot stress evaluating method for various combinations of plate thickness and weld leg length; Yosetsu kozo no toitsutekina hiro kyodo hyokaho ni kansuru kenkyu. Itaatsu to yosetsu ashinaga no kumiawase ni taisuru hot spot oryoku sanshutsu ni tsuite}
author = {Nihei, K, Inamura, F, and Koe, S}
abstractNote = {There has been tried to apply unified assessment method using hot spot stress, which is effective to evaluate fatigue strength of fillet welded structures for ships and marine structures. This method can be applied to complicated structures and is independent of welding processes. In this study, first, stress analysis has been conducted for two-dimensional fillet welded joint models with various combinations of plate thickness and weld leg length of general fillet structures by means of boundary element method. Then, critical position, which is not affected by local stress concentration due to bead, was determined from the detailed stress distribution in the vicinity of weld toe. As a result, a general equation has been proposed to estimate the hot spot stress by one-point representative method. Second, the fatigue tests of typical fillet welded joints have been conducted by applying this method. Consequently, it was demonstrated that the unified fatigue strength can be evaluated by the S-N data based on hot spot stress range determined from the proposed equation, independent of structural stress concentration. 22 refs., 14 figs.}
place = {Japan}
year = {1996}
month = {Dec}
}