2 lecture 4 - Failure Predictors and Safety Factors - slide

Systematic estimation of fd material selection this

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Unformatted text preview: at is a safety factor, and why do we use it? • Systematic estimation of Fd Material selection (this is covered in detail elsewhere) Mechanical Design Modes of failure Failure predictors (sometimes called “theories of failure”) • Why engineering designers need failure predictors • Main failure predictors Design factors of safety • How are they used? • How are they estimated? Mechanical Design “Design for structural integrity” Definition: It is the designer’s responsibility to choose the material and dimensions of an element to ensure that it has sufficient STRENGTH not to FAIL under the LOADS that it experiences in service (or to reduce the probability of the failure to an acceptably low level) Mechanical Design “Design for structural integrity” Definition: It is the designer’s responsibility to choose the material and dimensions of an element to ensure that it has sufficient STRENGTH not to FAIL under the LOADS that it experiences in service (or to reduce the probability of the failure to an acceptably low level) The designer needs to: • specify/predict the...
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