Relation between dilation and stress fluctuations in discontinuous shear thickening suspensions

We investigate dilation-induced surface deformations in a Discontinuous Shear Thickening (DST) suspension to determine the relationship between dilation and stresses DST. Video is taken at two observation points on of rheometer while shear normal are measured. A roughened observed as particles poke through liquid-air interface, corresponding dilation. Dilation events found be intermittent localized spatially. also fluctuate high- low-stress states, frequently high stress state. On other hand, complete lack when remain low values for several seconds. most prominent grow from state high-stress state, dilated region tends span entire by end growth period. only rates above thickening range. These relations confirm that coupled