Time dependent constitutive model for a biopolymer derived from castor oil polyurethane

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2014

Autores

Vieira, AC (Autor) Outra; Tita, V (Autor) Outra; da Costa, RRC (Autor) Outra; Guedes, RM (Autor) FEUP

Ata de Conferência Internacional

Título: BIODENTAL ENGINEERING III

Páginas: 191-196

3rd International Conference on Biodental Engineering (BIODENTAL)

Porto, PORTUGAL, JUN 22-23, 2014

Indexação

ISI Web of Knowledge - 1 Citação

Scopus - 1 Citação

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Biotecnologia ambiental

Outras Informações

ID Authenticus: P-009-J34

Abstract (EN): Polyurethane derived from the castor oil has been studied for medical device applications. However, unlike other materials, polymers show a time dependent mechanical behavior at body temperature. Therefore, in this work the material model parameters of a time dependent constitutive model are calibrated based on mechanical test results of this biopolymer. The mechanical tests used to calibrate the Bergstrom-Boyce model were the monotonic tests at different strain rates, creep and relaxation tests on step loading, cyclic loading at different strain levels together in tensile and compression. The non-linear viscoelastic model used in this work was able to capture the time-dependent mechanical behavior of the material under large strains. This three-dimensional constitutive model may be implemented in commercial finite element software packages, this way enabling the mechanical behavior and optimization of the functional compatibility of implants and prostheses produced using this PU.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6