01762nas a2200169   4500008004100000022001400041245007700055210006900132260007900201300001100280490000700291520111900298100002101417700002101438700002201459856011101481       2010                        eng d  a1539-375500aStrain-rate frequency superposition in large-amplitude oscillatory shear0 aStrainrate frequency superposition in largeamplitude oscillatory  aONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USAbAMER PHYSICAL SOCcMAR  a0314010 v813 a<p>In a recent work, Wyss et al. [Phys. Rev. Lett. 98, 238303 (2007)] have noted a property of ``soft solids'' under oscillatory shear, the so-called strain-rate frequency superposition. We extend this study to the case of soft solids under large-amplitude oscillatory shear (LAOS). We show results from LAOS studies in a mono-disperse hydrogel suspension, an aqueous gel, and a biopolymer suspension and show that constant strain-rate frequency sweep measurements with soft solids can be superimposed onto master curves for higher harmonic moduli with the same shift factors as for the linear viscoelastic moduli. We show that the behavior of higher harmonic moduli at low frequencies in constant strain- rate frequency sweep measurements is similar to that at large strain amplitude in strain- amplitude sweep tests. We show surface plots of the harmonic moduli and the energy dissipation rate per unit volume in LAOS for soft solids and show experimentally that the energy dissipated per unit volume depends on the first harmonic loss modulus alone, in both the linear and the nonlinear viscoelastic regime.</p>1 aKalelkar, Chirag1 aLele, Ashish, K.1 aKamble, Samruddhi  uhttps://library.ncl.res.in/content/strain-rate-frequency-superposition-large-amplitude-oscillatory-shear-0