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Orientador(es)
Resumo(s)
Material removal through the drilling mvolves two important processes. The fírst one is
drilling of material by cutting edges ofthe drill bit and the second one is the fi-iction generated
by the contact between drill bit and hole wall of the material. Both processes lead to heat
generation during drilling. In clinicai practice, drilling procedures and high-speed cutting
tools are often applied on boné tissue. These operations are associated to complications such
as thermal osteonecrosis due to the excessive heat generation and mechanical damage due to
the excessive leveis of penetration force. The development of additional tools for accurately
simulating the drilling is essential to predict the risk of thermo-mechanical damage during
boné drilling. This paper investigates the thermal and mechanical damage in boné tissue
induced by different parameters. An experimental and numerical approach of boné drilling
hás been conducted. A three-dimensional dynamic numerical model was developed to
simulate the mechanical and themial stresses generated during the drilling. The numerical
model incorporates the geometrical and dynamic characteristics involved in the drilling
processes. The numerical analysis hás been validated by experimental tests using
polyurethane foam materiais with similar mechanical properties to the human bone.
Descrição
Palavras-chave
Bone drilling Damage Experimental testing Numerical modelling
Contexto Educativo
Citação
Fernandes, M.G.A.; Fonseca, E.M.M.; Jorge, Renato N. (2016). Influence of bone drilling parameters on the thermal stress distribution. In 5th International Conference on Integrity, Reliability & Failure IRF2016. Porto. ISBN: 978-989-98832-4-6. p.183-184
Editora
Edições FEUP-INEGI 2016