Small-amplitude
oscillatory shear (SAOS) measurements were implemented at 200[degrees]C in the
oscillatory shear mode using the 25-mm parallel plate geometry; the gap was set at 1 mm, and frequency sweeps ranging from 0.01 to 100 rad/s were performed at 1 % strain to maintain the experiment within the linear viscoelastic domain.
Bailly, "The potential of large amplitude
oscillatory shear to gain an insight into the long-chain branching structure of polymers, "In: The 235th ACS National Meeting (2008), polymer preprints, ACS, vol.
The scientists determined rheological properties using strain sweeps, frequency sweeps and large amplitude
oscillatory shear (LAOS) measurements.
Figure 9 presents time-averaged wall shear stress (TAWSS), and Figure 10 presents the
oscillatory shear index (OSI) distribution in the five models.
Nehdi and Martini [17] studied the effects of the mixing time and temperature on the yield stress of cemented pastes incorporating various super plasticizers, where the yield stress was characterized by the
oscillatory shear test.
Oscillatory shear measurements of equilibrium water-swollen hydrogel materials offer frequency dependences of G' and G" (Figures 8 and 9).
Abbreviations CA: Carotid artery LCA: Left carotid artery RCA: Right carotid artery WSS: Wall shear stress EC: Endothelial cell DH: Dominant harmonic ICA: Internal carotid artery CT: Computerised tomography MRI: Magnetic resonance imaging TAWSS: Time averaged wall shear stress OSI:
Oscillatory shear index WSST: Temporal gradient of WSS.
The highest oscillatory nature was confined to the outer wall of the LCX, and the highly restricted distributions of flow and
oscillatory shear stress along the walls firmly corresponded with the principal locations of atheroma in the left coronary artery; hence, the rates of atherosclerosis in LCX are, in theory, higher.
The
oscillatory shear index was defined as follows: |retrograde shear|/(antegrade shear + |retrograde shear|) (22).
Using this technique, stable lesions develop distal to the cast under conditions of
oscillatory shear stress, whereas vulnerable lesions (containing a small amount of collagen) develop proximal to the cast due to a low shear stress.
Three oil-in-water cosmetic emulsions were studied using simple and
oscillatory shear rheological tests.