Creep and stress relaxation behaviour of PLA-PCL fibres - A linear modelling approach

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2015

Autores

Martins, C (Autor) Outra; Pinto, V (Autor) Outra; Guedes, RM (Autor) FEUP; Marques, AT (Autor) Outra

Ata de Conferência Internacional

Título: ICSI 2015 THE 1ST INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY FUNCHAL

Páginas: 768-775

1st International Conference on Structural Integrity (ICSI)

Funchal, PORTUGAL, SEP 01-04, 2015

Indexação

ISI Web of Knowledge - 17 Citações

Scopus - 15 Citações

Outras Informações

ID Authenticus: P-00G-TN3

DOI: 10.1016/j.proeng.2015.08.024

Abstract (EN): In the scope of this project, a biodegradable composite was studied as a possible solution for a ligament reinforcement material. The main focus was to analyze the creep and stress relaxation behaviour of poly lactid acid (PLA) blended with poly epsilon-caprolactone (PCL), i.e., PLA-PCL fibres, and investigate the performance of a simple linear viscoelastic mechanical model, the Burgers model, describing both behaviours. Based on the shape of the stress-strain curve, PLA-PCL displays, similarly to the natural ligament tissue, a nonlinear visco-elastoplastic behaviour. The linear viscoelastic approach seemed to be valid up to a certain stress level, assumed to be the linear viscoelastic threshold. Creep and relaxation data suggested that the rate of creep/stress relaxation decreases with increasing stress/strain. (C) 2015 The Authors. Published by Elsevier Ltd.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8