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Structural Design Philosophies?

  1. Aug 15, 2013 #1
    Good day!
    I don't know if they are called Structural design philosophy but, can anyone enumerate(if the list is incomplete) and differentiate the :
    1. Ultimate Strength Design
    2. Working Stress Design
    3. Limit State Design
    4. Allowable Stress Design
    5. Others (If there are)

    Help please.. Thanks :)
  2. jcsd
  3. Aug 21, 2013 #2
    I wouldn't call them philosophies, just structural criteria. A lot of those things are controlled by the intended operation for the task. Sometimes you want a widget just not to break, so you design to maximize ultimate strength. Sometimes there's a cyclical load on it, so you design for fatigue life. Sometimes you have a minimum limit for a widget under a certain loading condition. All of those terms are just different design parameters.
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