Pipe Plastic Section Modulus

In that case the whole section is divided in two parts one in tension and one in compression each under uniform stress field.

Pipe plastic section modulus. S section modulus in 3 section modulus is a geometric property for a given cross section used in the design of beams or flexural members. The plastic section modulus is then the sum of the areas of the cross section on each side of the pna which may or may not be equal multiplied by the distance from the local centroids of the two areas to the pna. The plastic section modulus is similar to the elastic one but defined with the assumption of full plastic yielding of the cross section due to flexural bending.

Plastic section modulus zp is the plastic section modulus resisting moment mp fy x zp the plastic section modulus assumes the entire section yields. The plastic section modulus can also be called the first moment of area. The plastic section modulus zx is used to determine the limit state of steel beams defined as the point when the entire cross section has yielded.

External pipe or tube surface per ft of length can be expressed as. Section properties radius of gyration cases 1 10. Transverse metal area can be expressed as.

The plastic section modulus is the sum of the areas of the cross section on each side of the pna which may or may not be equal multiplied by the distance from the local centroids of the two areas to the pna. A m transverse metal area in 2 external pipe surface.