Hi
in a traction compression uni-axial test on cylindrical samples, I use a set of 3 extensometers spaced at 120° around the sample to obtain the average deformation of the cylinder. this allows me to determine the stress and strain tensor in the sample. now, if I decompose the cylinder in tree equal sector cylinders (decomposition along the axe of loading) is it possible to obtain the stress and strain tensor of each sector cylinder from the stress and strain tensor of the hole cylinder?
Dear Mohamed,
I don't think that what you suggest will be possible. Given the fact that an asphalt mix is not really homogenous what is "proved" by the differences in the values of the 3 LVDT's. Personally I think that the best way to deal with it, is trying to keep the largest LVDT value constant (in order to get a strain controlled test) and accept that sometimes (hopefully only a few) the increase in one of the other two LVDT's becomes larger than the target value of the third one.
Regards
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