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Rationale
In
selecting materials for fabricating HPV components it is necessary
to have an understanding of their
elastic properties. Normally, components
are expected to remain in their elastic range of behavior when subjected
to the forces they meet in use. If the loads take them outside this range, permanent
deformation will occur. Quantification of the elastic properties is,
therefore, essential to the selection process. These properties are obtained
from measurements on material samples that are loaded in a controlled manner
and by measuring the change in dimensions which result. Some compressive loading
conditions will lead to material instability and elastic or plastic buckling
will occur. Values for the elastic constants of the materials, the limit
of their elastic behavior, and their buckling threshold response in compressive
loading will be obtained. |
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