Spectra from More Complicated Experimental Functions

CALCULATION OF SPECTRA FROM MORE COMPLICATED EXPERIMENTAL FUNCTIONS 

In Section F of Chapter 3, some more complicated viscoelastic experiments were formulated. The stress-strain or strain-stress curves can provide spectra through first differentiating to give the transient functions (equations 59 and 63 of Chapter 3) and then applying formulas such as equations 4 to 11. The stress relaxation after cessation of steady-state flow can provide the spectrum H through the following approximation relation  

Once again the reader is reminded that, although all the equations in this chapter refer to deformation in shear, they are equally applicable to other types of deformation if the shear moduli, compliances, and spectra are replaced by the corresponding functions appropriate to extension or bulk compression, etc. 

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E. CALCULATION OF SPECTRA FROM MORE COMPLICATED EXPERIMENTAL FUNCTIONS... 

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