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Volume 15
Issue 20
10.3390/ma15207326
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Article

The Effect of the Stress State, Testing Temperature, and Hardener Composition on the Strength of an AlMg5/Epoxy Metal-Polymer Joint

by
Sergey Smirnov
1,
Dmitry Konovalov
1,
Dmitry Vichuzhanin
1,
Irina Veretennikova
1,*,
Aleksander Pestov
2 and
Viktoria Osipova
2
1
Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, 620049 Ekaterinburg, Russia
2
I. Ya. Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620049 Ekaterinburg, Russia
*
Author to whom correspondence should be addressed.
Materials 2022, 15(20), 7326; https://doi.org/10.3390/ma15207326
Submission received: 29 September 2022 / Revised: 17 October 2022 / Accepted: 18 October 2022 / Published: 20 October 2022
(This article belongs to the Special Issue Metal and Polymer Composites for Functional and Structural Applications)
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Abstract

The regularities of the effect of a complex stress state on the strength of an AlMg5/epoxy adhesive joint are experimentally studied at −50 and +23 °C in tension+shear and compression+shear tests with different normal-to-shear stress ratios. The tests use modified Arcan specimens and Brazil-nut-sandwich specimens, with the lateral faces of the adhesive layer having a shape of a mushroom-like “ridge” aimed at reducing stress concentration at the specimen edges. An original computational model of a selected microvolume including the interface together with the adjacent substrate and adhesive layers is used to process the experimental results. The attainment of the threshold value of strain energy density in the selected microvolume, W*, is used as the failure criterion. The effect of the hardener composition, the testing temperature, and the value of the phase angle β determining the proportion of normal and shear stresses at the adhesive interface on the threshold value W* is detected. W*(β) diagrams (fracture loci) are plotted and analytically described logarithmic functions. They can be used to make strength calculations for adhesive joints in structures and metal-polymer composites.
Keywords: adhesive joint; strength; temperature; Arcan specimens; Brazil-nut-sandwich specimens adhesive joint; strength; temperature; Arcan specimens; Brazil-nut-sandwich specimens

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MDPI and ACS Style

Smirnov, S.; Konovalov, D.; Vichuzhanin, D.; Veretennikova, I.; Pestov, A.; Osipova, V. The Effect of the Stress State, Testing Temperature, and Hardener Composition on the Strength of an AlMg5/Epoxy Metal-Polymer Joint. Materials 2022, 15, 7326. https://doi.org/10.3390/ma15207326

AMA Style

Smirnov S, Konovalov D, Vichuzhanin D, Veretennikova I, Pestov A, Osipova V. The Effect of the Stress State, Testing Temperature, and Hardener Composition on the Strength of an AlMg5/Epoxy Metal-Polymer Joint. Materials. 2022; 15(20):7326. https://doi.org/10.3390/ma15207326

Chicago/Turabian Style

Smirnov, Sergey, Dmitry Konovalov, Dmitry Vichuzhanin, Irina Veretennikova, Aleksander Pestov, and Viktoria Osipova. 2022. "The Effect of the Stress State, Testing Temperature, and Hardener Composition on the Strength of an AlMg5/Epoxy Metal-Polymer Joint" Materials 15, no. 20: 7326. https://doi.org/10.3390/ma15207326

APA Style

Smirnov, S., Konovalov, D., Vichuzhanin, D., Veretennikova, I., Pestov, A., & Osipova, V. (2022). The Effect of the Stress State, Testing Temperature, and Hardener Composition on the Strength of an AlMg5/Epoxy Metal-Polymer Joint. Materials, 15(20), 7326. https://doi.org/10.3390/ma15207326

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