Testing, modelling and parameter identification for adhesively bonded joints under the combined influence of temperature and strain rate

Schmelzle L, Striewe M, Mergheim J, Meschut G, Possart G, Teutenberg D (2025)

Publication Type: Journal article

Publication year: 2025

Journal

Journal of Adhesion Science and Technology Taylor & Francis

DOI: 10.1080/01694243.2025.2569660

Abstract

Epoxy resin adhesives are widely used in lightweight and structural applications and their mechanical properties are strongly dependent on temperature and loading rate. In this study, shear and butt joint specimens are tested within a temperature interval from −40 °C to 60 °C for three different loading rates in order to determine the coupled influence of temperature and loading rate on the mechanical properties of adhesively bonded joints. For all the examined temperatures we observed higher stresses and lower failure strains for increasing loading rates at all temperatures. Using this experimental data, we extended the temperature dependent Toughened Adhesive Polymer (TAPO) material model we developed in our previous work to a temperature dependent rate dependency. Finally, we performed two validation steps on the identified temperature and rate dependent parameter set in a temperature range from −40 °C up to 80 °C. Therefore, we performed tests using an angle joint specimen as a basic specimen as well as a T-joint specimen as component level specimen at different rates and temperatures. In both cases, the identified parameter sets performed well for elastic, plastic, hardening and rate dependent material properties. However, the simulated damage evolution only agrees well with the experiments for low and medium temperatures. For the very high temperature of 80 °C the damage evolution is not captured as well, which can be explained by the proximity to the glass transition temperature of the examined adhesive. The developed extension of the TAPO model to include temperature-dependent rate dependency enables the numerical simulation of the combined temperature- and strain rate-dependent properties of structural adhesive joints.

Authors with CRIS profile

Lars Schmelzle Lehrstuhl für Technische Mechanik (LTM) Julia Mergheim Lehrstuhl für Technische Mechanik (LTM) Gunnar Possart Lehrstuhl für Technische Mechanik (LTM)

Involved external institutions

Universität Paderborn DE Germany (DE)

How to cite

APA:

Schmelzle, L., Striewe, M., Mergheim, J., Meschut, G., Possart, G., & Teutenberg, D. (2025). Testing, modelling and parameter identification for adhesively bonded joints under the combined influence of temperature and strain rate. Journal of Adhesion Science and Technology. https://doi.org/10.1080/01694243.2025.2569660

MLA:

Schmelzle, Lars, et al. "Testing, modelling and parameter identification for adhesively bonded joints under the combined influence of temperature and strain rate." Journal of Adhesion Science and Technology (2025).

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