A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CRACK GROWTH CONTROL METHOD AND CRACK GROWTH CONTROL STRUCTURE
To suppress crack growth.SOLUTION: A stop hole 8 is provided at a position corresponding to a tip of a crack 2 at a position where the crack 2 of a metal object occurs, and a pair of mounting grooves 4a, 4b extending outward from a position along a diameter direction of the stop hole 8 intersecting with a direction in which the crack 2 extends on a peripheral wall of the stop hole 8 is provided. Each of the mounting grooves 4a, 4b is formed in a shape including a widened portion 11 in which a groove width w1 of an opening 10 that opens to the peripheral wall of the stop hole 8 is set smaller than the diameter of the stop hole 8, and having a groove width w2 larger than the groove width w1 of the opening 10 at a position outside the peripheral wall of the stop hole 8. Portions 5a and 5b near both ends of the insertion member 3 having a shape in which the plate thickness of the portions 5a, 5b near both ends is larger than the plate thickness of a central portion 6 are inserted into the inside of each of the mounting grooves 4a, 4b, and are adhered and fixed to form a crack growth control structure.SELECTED DRAWING: Figure 2
【課題】 き裂の進展を抑制する。【解決手段】 金属製物体のき裂２が生じた個所に、き裂２の先端と対応する位置にストップホール８を設け、ストップホール８の周壁におけるき裂２の伸びる方向と交差するストップホール８の直径の方向に沿う位置から、外側に延びる一対の取付溝４ａ，４ｂを設ける。各取付溝４ａ，４ｂは、ストップホール８の周壁に開口する開口部１０の溝幅ｗ１が、ストップホール８の直径の寸法よりも小さく設定され、ストップホール８の周壁よりも外側となる位置に、開口部１０の溝幅ｗ１よりも大となる溝幅ｗ２を有する拡幅部１１を備える形状として形成する。両端寄り部分５ａ，５ｂの板厚が、中央部分６の板厚に比して大となる形状を備えた挿入部材３の両端寄り部分５ａ，５ｂを、各取付溝４ａ，４ｂの内側に挿入し、接着して固定して、き裂進展抑制構造を形成する。【選択図】図２
CRACK GROWTH CONTROL METHOD AND CRACK GROWTH CONTROL STRUCTURE
To suppress crack growth.SOLUTION: A stop hole 8 is provided at a position corresponding to a tip of a crack 2 at a position where the crack 2 of a metal object occurs, and a pair of mounting grooves 4a, 4b extending outward from a position along a diameter direction of the stop hole 8 intersecting with a direction in which the crack 2 extends on a peripheral wall of the stop hole 8 is provided. Each of the mounting grooves 4a, 4b is formed in a shape including a widened portion 11 in which a groove width w1 of an opening 10 that opens to the peripheral wall of the stop hole 8 is set smaller than the diameter of the stop hole 8, and having a groove width w2 larger than the groove width w1 of the opening 10 at a position outside the peripheral wall of the stop hole 8. Portions 5a and 5b near both ends of the insertion member 3 having a shape in which the plate thickness of the portions 5a, 5b near both ends is larger than the plate thickness of a central portion 6 are inserted into the inside of each of the mounting grooves 4a, 4b, and are adhered and fixed to form a crack growth control structure.SELECTED DRAWING: Figure 2
【課題】 き裂の進展を抑制する。【解決手段】 金属製物体のき裂２が生じた個所に、き裂２の先端と対応する位置にストップホール８を設け、ストップホール８の周壁におけるき裂２の伸びる方向と交差するストップホール８の直径の方向に沿う位置から、外側に延びる一対の取付溝４ａ，４ｂを設ける。各取付溝４ａ，４ｂは、ストップホール８の周壁に開口する開口部１０の溝幅ｗ１が、ストップホール８の直径の寸法よりも小さく設定され、ストップホール８の周壁よりも外側となる位置に、開口部１０の溝幅ｗ１よりも大となる溝幅ｗ２を有する拡幅部１１を備える形状として形成する。両端寄り部分５ａ，５ｂの板厚が、中央部分６の板厚に比して大となる形状を備えた挿入部材３の両端寄り部分５ａ，５ｂを、各取付溝４ａ，４ｂの内側に挿入し、接着して固定して、き裂進展抑制構造を形成する。【選択図】図２
CRACK GROWTH CONTROL METHOD AND CRACK GROWTH CONTROL STRUCTURE
き裂進展抑制工法およびき裂進展抑制構造
MURAKAMI TAKEO (author) / YAMASHITA YOICHI (author)
2019-12-26
Patent
Electronic Resource
Japanese
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