Craft · 6 pages · 12 min
How sheet metal is bent
Bending stretches the outside of the sheet and compresses the inside until the metal yields.
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From the opening
Sheet metal is bent by forcing it around a corner so the outside of the thickness stretches and the inside shortens. Once the metal yields, it keeps most of the new angle instead of springing all the way back to flat. The opening covers outside stretches, inside shortens, yield lets the new angle stay, and springback returns part of the bend.
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Inside
- Outside stretches, inside shortens
- Yield lets the new angle stay
- Springback returns part of the bend
- A tight radius can crack
- Where the idea stops applying
- A distinction worth keeping
Sources
- Plastic bending of sheet metal
- Springback after a brake bend