bulb_section#

sectionproperties.pre.library.steel_sections.bulb_section(d: float, b: float, t: float, r: float, n_r: int, d_b: float | None = None, material: Material = Material(name='default', elastic_modulus=1, poissons_ratio=0, yield_strength=1, density=1, color='w')) → Geometry[source]#

Constructs a bulb section.

Constructs a bulb section with the bottom left corner at the point (-t / 2, 0), with depth d, bulb depth d_b, bulb width``*b``, web thickness t and radius r, using n_r points to construct the radius.

Parameters:

  • d (float) – Depth of the section

  • b (float) – Bulb width

  • t (float) – Web thickness

  • r (float) – Bulb radius

  • d_b (float | None) – Depth of the bulb (automatically calculated for standard sections, if provided the section may have sharp edges)

  • n_r (int) – Number of points discretising the radius

  • material (Material) – Material to associate with this geometry

Returns:

Bulb section geometry

Return type:

Geometry

Example

The following example creates a bulb section with a depth of 240 mm, a width of 34 mm, a web thickness of 12 mm and a bulb radius of 16 mm, using 16 points to discretise the radius:

from sectionproperties.pre.library import bulb_section

bulb_section(d=240, b=34, t=12, r=10, n_r=16).plot_geometry()

(Source code, png, hires.png, pdf)

../_images/sectionproperties-pre-library-steel_sections-bulb_section-1.png

Bulb section geometry#