The Development and Study of a New Silylated Polyurethane-Based Flexible Adhesive—Part 2: Joint Testing and Numerical Modelling

Author:

Rodrigues Vasco C. M. B.1,Marques Eduardo A. S.2,Carbas Ricardo J. C.1ORCID,Youngberg Michael3,Dussaud Anne3,Beygi Reza1ORCID,da Silva Lucas F. M.2ORCID

Affiliation:

1. Institute of Science and Innovation in Mechanical and Industrial Engineering (INEGI), Rua Dr. Roberto Frias, 4200-465 Porto, Portugal

2. Department of Mechanical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal

3. Momentive Performance Materials Inc., 769 Old Saw Mill River Road, Tarrytown, NY 10591, USA

Abstract

The need for more sustainable adhesive formulations has presented the possibility of using silane-based adhesives in the automotive industry. In this work, a dual-cure two-component silylated polyurethane resin (SPUR) adhesive was tested in single-lap joints, to assess in-joint behaviour at room temperature under quasi-static conditions for aluminium substrates. The effect of two different overlap lengths, 25 and 50 mm, was also considered. A numerical model was built using cohesive zone modelling in finite element software, to reproduce the mechanical behaviour of the joint. The model was fed with data experimentally withdrawn from the first part of this paper. A triangular-shaped cohesive zone model (CZM) law was chosen as the adhesive behaviour was highly elastic and lacked yielding phenomena. The experimental results served as the base for the numerical validation, allowing accurate CZM parameters to be successfully determined.

Publisher

MDPI AG

Subject

General Materials Science

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