I need to prepare a tensile specimen from a sample of diameter 40 mm. It is a composite of PCL-HA-Mg made via cold pressing. Also, suggest the astm d638 type which i should scale down?
In general, researchers go for Type I - Rectangular cross section (13 mm width x 3 mm thick) & a gauge length of 50 mm for testing plastics & its nanocomposites. Type III might be used for your specimen but the diameter has to be reduced to ~25 mm or else you need go for some other standard.
Hi Pragya,
Based on my own experience, the only thing that matters in doing tensile test is avoiding stress concentration at the grip section or the area with a fillet. So, you can scale down the specimen dimension with a factor except the fillet radius. you need to keep the fillet radius unchanged.
Best,
F.
@farhad Is it necessary to make dog bone sample? Can't we cut it in rectangular shape, this way we can avoid stress concentration.
Thank You
PR
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