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class:
vernacular (1.0)

Term: | boundary conditions |

Definition: |
Boundary conditions are constraints--e.g. displacements, forces, pressures, velocities, temperatures, etc.--imposed on the edges or surfaces of a system. They are used to solve mathematical models of physical systems, including those used in computational methods like finite element analysis. |

Examples: |
A cantilever beam has clamped-free boundary conditions at its ends. The other boundary conditions change its behavior: gravity loading or another downward force applied to the top surface causes bending, whereas a compressive axial load at the free end can lead to buckling. |

Created 2023.04.10

Last Modified 2024.10.04

Contributed by Smiles
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https://n2t.net/ark:/99152/h8078

Boundary conditions are also the parts that we "know" about the structural response of a system and thus these conditions enable the otherwise ill-condition computation of the structural response of a structure. Moreover, boundary conditions, like rotation-free but translation-restrained supports, can be applied to the interior nodes or edges of a structural system too, not only to the edges. This depends on the choice of discretization of the system. Think of a cantilevering slab supported by a wall within. - Peaceful Panda 2023.04.18

try to focus on describing boundary conditions rather than what they cause in the examples (i.e., remove stuff about buckling etc) - Radiance Panther 2023.04.12