Neutral Line In Sheet Metal

Bend allowance is used to account for bends in sheet metal fabrications.

Neutral line in sheet metal.

When metal is bent the top section is going to undergo compression and the bottom section will be stretched. Figure 2 after bending the bend area is 10 to 15 percent thinner than before bending. During sheet metal bending. It is easy to work with and very attractive in the home.

Neutral axis an imaginary line that has the same length after bending as it had before bending. Somewhere in between the thickness of material lies neutral axis. Figure 4 figure 4. Neutral axis is a line where material is neither compressed or stretched.

If the material did not stretch at all then the neutral line would be at 50 of the material. That is it shifts toward the inside of the bend. Its location in the material is a function of the forces used to form the part and the material yield and tensile strengths. The neutral axis is a theoretical area lying at 50 percent of the material thickness while unstressed and flat.

I had a question on k factors for our 3 d modeling software. The neutral line also called the neutral axis is an imaginary line that can be drawn through a cross section of the workpiece that represents the locus where no tensile nor compressive stresses are present on the work. X 36 the md building products 36 in. This is known as the neutral line or neutral axis and occurs at a distance approximately 0 445 times the metal thickness 0 445 t from the inside of the radius of the bend.

Neutral axis and stresses resulting from bending. When you bend sheet metal the neutral axis shifts toward the inside surface of the bend. Our design engineers typically use a factor of 0 4 for our air formed press brake parts. The theoretical line of the neutral axis will remain the same length both before and after the bend is complete.

This thinning of the bend area moves the neutral line of the metal in towards the radius center. A line through the thickness of the bend called the neutral axis does not change in length when the part is bent. Mill aluminum union jack style perforated sheet metal offers a decorative way to complete your hvac door window hobby and cabinet projects. The md building products 36 in.

When a piece of sheet metal is bent the overall length of the piece changes because of compression on the inside of the bend and tension on the outside. Inside bend surface is compressed whereas the outer bend surface is stretched. The sheet features a union jack style perforated design. The neutral line is an imaginary line that passes somewhere close to the middle of the material.

The k factor is the ratio of the neutral axis location t to the material thickness mt. It is the area where the material neither stretches nor compresses in the bend.