Dr Beñat Gurrutxaga-Lerma, Trinity College, University of Cambridge, UK

A study of time dependent transient effects in dynamic contact
When Oct 15, 2018
from 02:00 PM to 03:00 PM
Where LR1, Thom Building
Contact Name
Contact Phone 01865-273030
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We develop an elastodynamic formulation to study the contact problem between two elastically similar flat surfaces. To begin with, we focus on antiplane contact, but show how the formulation is to be extended to in-plane problems. This enables us to offer a time-dependent extension of (or deviation from) the classical Cattaneo-Mindlin contact problem under strongly time-dependent loads and in the presence of frictional forces. We show that the elastodynamic version of the distributed dislocation technique appears to be the only mathematically not ill-posed way of describing slip. We show the presence of waves of forward and reverse slip under loading that in static conditions would lead to just one of the two. We highlight the importance that different loading regimes (ramps, shocks,…) and the frictional law have in establishing the frictional load.