Book: Finite Element Analysis by G. Lakshmi Narasaiah
Mechanical design is the design of a component for optimum size, shape, etc. against failure under the application of operational loads. A good design should also minimize the cost of material and cost of production. Failures that are commonly associated with mechanical components are broadly classified as:
(a) Failure by breaking of brittle materials and fatigue failure (when subjected to repetitive loads) of ductile materials.
(b) Failure by yielding of ductile materials, subjected to non-repetitive loads.
(c) Failure by elastic deformation.


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