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REPAIR METHOD AND MEMBER FOR REPAIR OF FATIGUE CRACK
PROBLEM TO BE SOLVED: To provide a repair method for preventing crack reoccurrence from a hole end part by suppressing stress fluctuation width of the hole end part of a stop hole provided at a tip part of a fatigue crack.SOLUTION: A repair method of a fatigue crack includes: a step 1 for providing a stop hole 3 at a tip part of a fatigue crack 2 with respect to the fatigue crack 2 that occurs in a structure and/or providing a wedge hole 7 on a path other than a base part and the tip part of the fatigue crack; a step 2 for fitting wedge means 4 having a variable wedge load into the stop hole 3 and/or the wedge hole 7; and a step 3 for applying the wedge load for suppressing the stress fluctuation width of the structure of a hole end part of the stop hole 3 or the tip part of the fatigue crack 2.SELECTED DRAWING: Figure 13
【課題】疲労亀裂の先端部に設けたストップホールの孔端部の応力変動幅を抑制し、孔端部からの亀裂再発を防ぐ補修方法を提供すること。【解決手段】構造物に生じた疲労亀裂２に対して疲労亀裂２の先端部にストップホール３を設ける及び／又は疲労亀裂の基部と先端部以外の経路上にウェッジホール７を設けるステップ１と、ストップホール３及び／又はウェッジホール７にくさび荷重が可変のくさび手段４をはめ込むステップ２と、ストップホール３の孔端部又は疲労亀裂２の先端部の構造物の応力変動幅を抑制するくさび荷重を付与するステップ３とを備えた疲労亀裂の補修方法。【選択図】図１３
REPAIR METHOD AND MEMBER FOR REPAIR OF FATIGUE CRACK
PROBLEM TO BE SOLVED: To provide a repair method for preventing crack reoccurrence from a hole end part by suppressing stress fluctuation width of the hole end part of a stop hole provided at a tip part of a fatigue crack.SOLUTION: A repair method of a fatigue crack includes: a step 1 for providing a stop hole 3 at a tip part of a fatigue crack 2 with respect to the fatigue crack 2 that occurs in a structure and/or providing a wedge hole 7 on a path other than a base part and the tip part of the fatigue crack; a step 2 for fitting wedge means 4 having a variable wedge load into the stop hole 3 and/or the wedge hole 7; and a step 3 for applying the wedge load for suppressing the stress fluctuation width of the structure of a hole end part of the stop hole 3 or the tip part of the fatigue crack 2.SELECTED DRAWING: Figure 13
【課題】疲労亀裂の先端部に設けたストップホールの孔端部の応力変動幅を抑制し、孔端部からの亀裂再発を防ぐ補修方法を提供すること。【解決手段】構造物に生じた疲労亀裂２に対して疲労亀裂２の先端部にストップホール３を設ける及び／又は疲労亀裂の基部と先端部以外の経路上にウェッジホール７を設けるステップ１と、ストップホール３及び／又はウェッジホール７にくさび荷重が可変のくさび手段４をはめ込むステップ２と、ストップホール３の孔端部又は疲労亀裂２の先端部の構造物の応力変動幅を抑制するくさび荷重を付与するステップ３とを備えた疲労亀裂の補修方法。【選択図】図１３
REPAIR METHOD AND MEMBER FOR REPAIR OF FATIGUE CRACK
疲労亀裂の補修方法及び補修用部材
TAKAHASHI KAZUHIKO (author)
2018-09-13
Patent
Electronic Resource
Japanese
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