Method and apparatus for determining the true stress and true strain behavior of a ductile polymer
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United States of America Patent
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Jul 31, 2001
Grant Date -
N/A
app pub date -
Mar 31, 1999
filing date -
Mar 31, 1999
priority date (Note) -
Expired
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Abstract
A small punch test apparatus is used to determine true stress and true strain in a ductile polymeric material as it undergoes deformation by the punch head. The information gathered can be used comparatively to assess the acceptability of a body implant subjected to sterilization against similar information obtained on another implant of the same polymer already known to be acceptable.
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