METAL SHEET BENT PORTION FATIGUE CRACK GROWTH SUPPRESSING METHOD AND AUTOMOTIVE PART
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United States of America
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Issued Date -
Dec 19, 2024
app pub date -
Jul 22, 2022
filing date -
Jul 22, 2022
priority date (Note) -
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Abstract
A metal sheet bent portion fatigue crack growth suppressing method suppresses a growth of a fatigue crack generated in a bent portion formed by bending a metal sheet, and includes applying a plastic strain at least in a range from a bending start point to a bending end point on a bend inner side of the bent portion in a direction orthogonal to a valley line direction of the bent portion at an interval equal to or larger than a sheet thickness of the metal sheet in the valley line direction so as to generate a compressive residual stress.
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