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

• Type: Article in International Conference Proceedings Book
• Date: 2015

Authors

Martins, C (Author) Other; Pinto, V (Author) Other; Guedes, RM (Author) FEUP; Marques, AT (Author) Other

Conference proceedings International

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

Pages: 768-775

1st International Conference on Structural Integrity (ICSI)

Funchal, PORTUGAL, SEP 01-04, 2015

Indexing

ISI Web of Knowledge - 17 Citations

Scopus - 15 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8