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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 50: Poster Session III

CPP 50.25: Poster

Dienstag, 17. März 2020, 14:00–16:00, P1C

Generic hysteresis model for palpation in the elasto-capillary regime — •Paul Zech, Andreas Otto, Martin Dehnert, and Robert Magerle — Fakultät für Naturwissenschaften, TU Chemnitz

We develop a multisensory interface that allows humans to perceive and to explore interactively the mechanical response of soft materials and tissues on the nanometer scale. To this end, we use an atomic force microscope for measuring force--distance curves which inform about the material's viscoelastic properties as well as its deformation behavior and capillary forces. Humans explore a material in much more variable ways than an instrumented indentation experiment. Therefore, existing models do not describe an arbitrary user--material interaction. We present a generic hysteresis model that predicts the force (output) of a haptic device for a given indentation trajectory (input). The model uses built-in memory in form of a hysteretic play operator and allows the user to perceive dissipative as well as elastic nanomechanical properties equally well.