UFC 3-260-02

30 June 2001

A = cross-section area of the test specimen, square millimeters (square inches)

Calculate the recoverable axial strain ,o using the equation

,

where

H3 = measured height of recoverable strain, millimeters (inches)

H4 = measured chart height, millimeters (inches)

S = full-scale strain amplitude determined by settings on the recording equipment

Calculate the dynamic modulus *E** using the equation

F

* (*

(H-3)

,

where

Fo = axial loading stress, MPa (psi)

,o = recoverable axial strain, millimeters per millimeter (inches per inch)

Report the average dynamic modulus at temperatures of 4.5, 21, and 37.8 degrees Celsius (40,

70, and 100 degrees Fahrenheit) for each loading frequency at each temperature.

H-3

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