NUMERICAL AND EXPERIMENTAL ASSESSEMENT OF THE DISPLACEMENT FIELD ON PDMS SAMPLE

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

Authors

Ribeiro, J (Author) Other; Lopes, H (Author) Other; Pedro Martins (Author) FEUP; Mário Vaz (Author) FEUP

Conference proceedings International

Title: Proceedings of the 6th International Conference on Mechanics and Materials in Design - M2D2015

Pages: 1145-1146

6th International Conference on Mechanics and Materials in Design

Ponta Delgada/Azores, 26-30 July 2015

Indexing

ISI Web of Knowledge - 0 Citations

Other information

Authenticus ID: P-00K-MXP

Abstract (EN): In recent years, the study of polymers like polydimethylsiloxane materials (PDMS) has become a great interest field due its growing used in biomechanics applications. In this work the Digital Image Correlation (DIC) is proposed for the measurement of the continuous displacement field. This experimental optical technique allows the measurement with high resolution and without contact of the large displacements at the material surface and, therefore, is considered the most suitable technique for the mechanical characterization of hyper-elastic materials. The numerical simulations were implemented by using the commercial finite elements program Ansys r. This combines the experimental information taken from the tensile test performed in PDMS with material constitutive models to reproduce the experimental displacement fields observed during the experimental test. For this study, different constitutive hyper-elastic material models were analysed, namely: the MooneyRivlin model, Ogden model and Yeoh models. The numerical technique show to be very effective to reproduced the global mechanical behaviour of hyper-elastic materials. However, the local behaviour is very difficult to predict and further developments must be made in order to improve the quality of material behaviour.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 2