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Materials,
Properties and Design |
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The
Effect of Shape
· Once
a careful selection has been made of the materials from which the structure
may be fabricated, the shape of the part becomes important. The same material
with a different shape will have a different mechanical response.
·
The material (green free-form) is converted into a structural component
(in this case a girder) by selecting an I-shape that distributes the material
mainly at the top and bottom of the structural component. Experiment shows
that this shape is good in sustaining vertical bending loads, and I-beams
of this type are employed in building construction. Selection of different
shapes, or the same shape but with different height-to-width ratios will
change the material performance as a structural element.
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Material + Shape =
Component |
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From:
Ashby,
"Materials
Selection in Mechanical Design," Pergamon (1993) |
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