ABSTRACT
To determine the correct values for the coefficients a, b, c, ···,an NIST standard material may be tested, whereby a polynomial may be fit3 to the experimental pushrod deflection data set, converted from the LVDT voltage output. By subtracting (like terms) this polynomial from that of the NIST data for the standard material:
( ~l) casing -( ~~) NIST data ( V ~Vo ) a polynomial representing the expansion of the casing material may be calculated. This polynomial can then be used in software to correct for casing expansion in all future specimen expansion measurements.
