ultimate load

In stress analysis, the minimum load that in its last increment causes a physical breakdown in an aircraft or component during a strength test or a load that, according to computation, should cause such a breakdown. Normally, the ultimate load is higher than 1.5 to 1.7 times the normal load in flight.
Stress and strain in structural steel
From O to A the stress is proportional to the strain and A is the proportional limit. At B, elongation begins and the material becomes plastic. The yield point is thus at C, at which point the material begins to strain harden. Point D represents the maximum tensile stress or the ultimate strength. At E the fracture takes place. E is the ultimate load in this case.

Aviation dictionary. 2014.

Look at other dictionaries:

  • ultimate load — noun (aeronautics) The maximum load that a structure is designed to withstand without a failure • • • Main Entry: ↑ultimate …   Useful english dictionary

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  • ultimate load — /ʌltəmət ˈloʊd/ (say ultuhmuht lohd) noun the maximum load which a structure is designed to withstand …   Australian English dictionary

  • load — Fin an initial charge in some investment funds. See also load fund …   The ultimate business dictionary

  • ultimate factor of safety — The safety factor in aircraft structure. It is the ratio of the ultimate load at which the structure is likely to fail to the loads imposed under normal operating conditions. This ratio normally varies between 1.5 and 1.7 …   Aviation dictionary

  • ultimate strength — As it pertains to the strength of materials, it is the quantum of stress beyond which the material will fail. See strain and ultimate load …   Aviation dictionary

  • Ultimate Mortal Kombat 3 — Promotional flier for the arcade version Developer(s) Midway …   Wikipedia

  • Load — Студийный альбом Metallica …   Википедия

  • ultimate tensile stress — noun (engineering) The highest load applied to a metal in the course of a tensile test, divided by the original cross sectional area • • • Main Entry: ↑ultimate …   Useful english dictionary

  • load fund — Fin a unit trust that charges a fee for the purchase or sale of shares. See also noload fund …   The ultimate business dictionary

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