Mathematically, when a plane is used to cut a three-dimensional figure, the cut figure is called a section, the transverse section is called a transverse section, and the longitudinal section is called a longitudinal section. Of course, there is also a relative longitudinal section, that is, a plane cut along the length direction, which is the longitudinal section. Cross-sectional area refers to the area of a cross section, which can be calculated by measuring its length, width and height.
The area of geometric surface cut by plane is called cross-sectional area. In short, it is the size of the contact area between the three-dimensional object and the cutter face after being crosscut, so different cutting methods will have different cross-sectional areas. For example, for a cube with a side length of 1, its cross-sectional area can be square or rectangular.
Calculation of cross-sectional area
The formula for calculating the cross-sectional area is expressed in letters as S=(a+b)h÷2, and the cross-sectional area is the area where the surface of the geometric body is cut by a plane. A cross-section is defined as a cross-sectional shape perpendicular to the axial direction of a beam.
ANSYS provides 1 1 beam section shapes with common section shapes, and supports user-defined section shapes. When the section is determined, ANSYS establishes a 9-node numerical model, determines the section characteristics of the beam, and solves Poisson equation to get the bending characteristics.