Correlation of a discrete friction (Iwan) element and continuum approaches to predict interface sliding behavior

A six-parameter Iwan model and its application

“…(18) and (20) respectively. Then the rest of the parameters can be determined by solving these equations through Powell Optimization.…”

“…Motivated by the series-series Iwan model, Miller and Quinn [19] proposed a model with a twosided interface for describing the structure damping caused by joints. Deshmukh et al [20] developed a new Iwan element and proposed a shear-lag model to simulate interface sliding behaviors. In recent studies the parallel-series Iwan model was more frequently used.…”

Maximum entropy modeling of discrete uncertain properties with application to friction

“…The above stochastic modeling technique will be exemplified here on a property seldom considered and yet exhibiting well known uncertainty, i.e., friction. When two deformable bodies are in extended contact with each other, as in joints, turbomachinery blade friction dampers, brakes, etc., the coefficient of friction between them must be defined over the contact zone, i.e., as a spatially varying property which governs the occurrence of stick, microslip, or macroslip (e.g., see Sinha and Griffin, 1985, Berger and Deshmukh, 2005, Deshmukh et al, 2007, Segalman et al, 2009, and references therein). After an appropriate spatial discretization of the contact zone, it becomes then necessary to specify the coefficient of friction at a set of discrete locations.…”