Advisor(s)
Abstract(s)
The behaviour of bone tissue during drilling has been subject of recent studies due to its
great importance. Because of thermal nature of the bone drilling, high temperatures and
thermal mechanical stresses are developed during drilling that affect the process quality.
However, there is still a lack information with regard to the distribution of mechanical and
thermal stresses during bone drilling. The present paper describes a sequentially coupled
thermal-stress analysis to assess the mechanical and thermal stress distribution during bone
drilling. A three-dimensional thermo-mechanical model was developed using the ANSYS/LSDYNA
finite element code under different drilling conditions. The model incorporates the
dynamic characteristics of drilling process, as well as the thermo-mechanical properties of
the involved materials. Experimental tests with polyurethane foam materials were also
carried out. It was concluded that the use of higher feed-rates lead to a decrease of normal
stresses and strains in the foam materials. The experimental and numerical results were
compared and showed good agreement. The proposed numerical model could be used to
predict the better drilling parameters and minimize the bone injuries.
Description
Keywords
Bone drilling Experimental tests Numerical simulation
Citation
Fernandes, Maria G.A.; Fonseca, E.M.M.; Natal, R.M. (2016). Effect of different feed-rate in bone drilling: experimental and numerical study. In 10º Congresso Nacional de Mecânica Experimental, LNEC. Lisboa.
Publisher
LNEC