Experimental And Numerical Validation Of An
Enhanced Cylindrical Contact Force Model
Author(s)
C. Pereira, A. Ramalho & J. Ambrósio
Abstract
Many applications in contact mechanics require that the contact force is
expressed in terms of a pseudo-indentation. For spherical contact and when the
assumptions of the Hertz contact model are fulfilling, it provides a continuous
contact model which is able and simple to use. For cylindrical contact, Johnson
proposed an accurate model but the contact force is defined as an implicit
function of indentation. It requires therefore a numerical iterative procedure to
obtain the contact force, which represents a difficulty when implemented in a
computational code for impact simulation. A new enhanced cylindrical contact
model that has the simplicity of the Hertz contact model and the accuracy of the
Johnson cylindrical model was recently proposed by the authors. An
experimental validation of new enhanced contact model to analyze the internal
contact for different clearance and load values is presented and discussed in this
work. It is concluded that the experimental validation is limited to a narrower
range of conformal contact conditions. Therefore, a numerical study was
conducted to evaluate the suitability of the enhanced model to analyze the
internal elastostatic frictionless contact between cylindrical bodies for very low
clearances and different loads. Depending on clearance and load values, the
values estimated from the enhanced model were compared with numerical or
experimental results. The validation of the new enhanced contact force model
has been done therefore applying a hybrid methodology.
Keywords: contact mechanics, internal cylindrical contact, conformal contact,
contact dynamics, finite element models, experimental validation.
Keywords
contact mechanics, internal cylindrical contact, conformal contact,
contact dynamics, finite element models, experimental validation
Related Book
Other papers in this volume
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