Service Life of Adhesive Bonds under Cyclic Loading with a Filler Based on Natural Waste from Coconut Oil Production

The research is focused on the evaluation of mechanical properties of adhesive bonds with a composite layer of adhesive to increase their service life (safety) under cyclic loading of different intensities. Cyclic loading represents a frequent cause of adhesive bond failure and, thus, a reduction in...

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Bibliographic Details
Published in:Polymers 2022-03, Vol.14 (5), p.1033
Main Authors: Hrabě, Petr, Kolář, Viktor, Müller, Miroslav, Hromasová, Monika
Format: Article
Language:English
Subjects:
Adhesive bonding
Agricultural commodities
Bond strength
Coconut oil
Composite materials
Cyclic loads
Environmental impact
Fillers
Humidity
Laboratories
Mechanical properties
Particle size
Polymers
Service life
Shear strength
Static tests
Stress
Variance analysis
Viscoelasticity
Wetting
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Summary:The research is focused on the evaluation of mechanical properties of adhesive bonds with a composite layer of adhesive to increase their service life (safety) under cyclic loading of different intensities. Cyclic loading represents a frequent cause of adhesive bond failure and, thus, a reduction in their service life. Waste from the production of coconut oil, that is, coconut shells in the form of particles, was used as a filler. Coconut shells are in most cases incinerated or otherwise uselessly incinerated, but they can also be used as a natural filler. Cyclic loading (quasi-static tests) was performed for 1000 cycles in two intensities, that is, 5-30% (157-940 N) of maximum force and 5-50% (157-1567 N) of maximum force. The results of the experiment showed a positive effect of the added filler, especially at an intensity of 5-50%, when the service life of adhesive bonds with a composite adhesive layer (AB10, AB20, AB30) increased compared to adhesive bonds without added AB0 filler, which did not withstand the given intensity. A more pronounced viscoelastic behavior of adhesive bonds was demonstrated at an intensity of 5-50% between the 1st and 1000th cycle. SEM analysis showed reduced wetting of the filler and matrix and delamination due to cyclic loading.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym14051033