Yield surface derivation for a structural adhesive based on multiaxial experiments

authored by

Michael Kuhn, Nikolas Manousides, Alexandros Antoniou, Claudio Balzani

Abstract

Yield surface determination is an essential part of a material characterization, enabling the qualification of a suitable yield criterion. In the case of two-component, fiber-reinforced structural adhesives the manufacturing quality of the specimens is directly linked to the determination accuracy of the yield surface. Therefore, this work was based on specimens that have been optimized in a previous study utilizing a structural, epoxy-based adhesive designed for the manufacture of wind turbine rotor blades. This allowed for a precise identification of a yield locus in combined tension–torsion and compression–torsion experiments. A practical elasto-plastic shear stress correction was developed to account for the transition between elastic and plastic states. In addition, a scaling method of an elliptical yield locus fitting function is proposed to calculate equivalent stresses and strains. The obtained results are discussed regarding influences of viscoelasticity and are compared to existing yield criteria.

Organisation(s)

Institute of Wind Energy Systems

External Organisation(s)

Fraunhofer Institute for Wind Energy Systems (IWES)

Type

Article

Journal

Polymer testing

Volume

113

No. of pages

13

ISSN

0142-9418

Publication date

09.2022

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Polymers and Plastics, Engineering (miscellaneous)

Research Area (based on ÖFOS 2012)

Renewable energy, Polymer engineering

Sustainable Development Goals

SDG 7 - Affordable and Clean Energy

Electronic version(s)

https://doi.org/10.1016/j.polymertesting.2022.107648 (Access: Open)