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RESIDUAL STRESS DISTRIBUTION MEASURING METHOD, CALCULATING METHOD, AND PROGRAM

外国特許コード F210010290
整理番号 S2018-0990-C0
掲載日 2021年1月28日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2019JP032870
国際公開番号 WO 2020054347
国際出願日 令和元年8月22日(2019.8.22)
国際公開日 令和2年3月19日(2020.3.19)
優先権データ
  • 特願2018-169714 (2018.9.11) JP
発明の名称 (英語) RESIDUAL STRESS DISTRIBUTION MEASURING METHOD, CALCULATING METHOD, AND PROGRAM
発明の概要(英語) A residual stress distribution measuring method according to the present invention is characterized by including: a step of using an analytical model in which a cutting plane has been imparted to a cross section through a metal member, to calculate a residual force vector, which is the sum of a load vector acting on a first metal piece in the cutting plane, and a load vector acting on a second metal piece in the cutting plane; a step of calculating, as a correction displacement vector, an amount of movement in the cross section, by imparting the residual force vector to the cross section in the analytical model of the metal member, as a forced load; a step of correcting the shape, in the cutting plane, of the first or second metal piece, on the basis of the correction displacement vector calculated using the analytical model including a measured shape, in the cutting plane, of the first or second metal piece; and a step of calculating a residual stress distribution in the cross section by using the analytical model in which the shape, in the cutting plane, of the first or second metal piece has been corrected, to impart a forced displacement to the analytical model.
従来技術、競合技術の概要(英語) BACKGROUND ART
In recent years, a ship, a representative bridge structure in the construction of a large size and, when assembling the members to each other, members for bonding is always present, the bonding technique is essential. In the bonding technique, has been widely used from the convenience of welding. However, with the construction of the welding, the welding portion in the vicinity of a high residual tensile stress occurs inevitably, due to fatigue, stress corrosion cracking (Stress Corrosion Cracking: SCC) and factors, may cause a brittle fracture when. Further, the stress balance occurs because the residual compressive stresses in the case of the thin plate member, the buckling deformation is likely to generate, may provide a large effect on the assembly. These stresses are generally referred to as weld residual stress, residual stress in the vicinity of a weld is evaluated for distribution on said welding is very important.
A low-cost and simple member as a method capable of measuring the residual stress inside the contour method can be cited. Contour method, the member to be measured 2 is cut into two, and division, with the release of residual stress by measuring the amount of elastic deformation of the cut surface, then, based on the measurement result, to calculate the residual stress distribution in the whole area of the cut surface (for example, see Patent Document 1).
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • UNIVERSITY PUBLIC CORPORATION OSAKA
  • 発明者(英語)
  • SHIBAHARA, Masakazu
  • IKUSHIMA, Kazuki
  • KAWAHARA, Atsushi
  • KAWAJIRI, Yoshitaka
  • OKIMI, Yui
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG

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