Abstract
This paper is a discussion of the results of tests intended to (i) estimate the effects of component mix ratios and heat curing of an adhesive joint on the tensile strength, and (ii) to determine the adhesive component mix ratio for which heat curing is insignificant to the strength of adhesive butt joints. Experimental tests were carried out at ambient temperature and elevated temperature during which adhesive butt joints were loaded with a tensile force until failure. The variables were the mix ratio of epoxy adhesive components and the application of heat holding at the adhesive curing stage. An LSTM (long short-time memory) forecast was used to determine the point corresponding to the mix ratio of adhesive components at which heat holding of the adhesive joint no longer has a positive and significant importance to the final tensile strength of the joint.
Highlights
Joining with adhesives which are sometimes underestimated is a major complement to the traditional techniques of joining materials
Experimental tests were performed on adhesive butt joints made with ø20 × 100 mm cylindrical specimens made of grade 1.0037 steel (EN 10025:2019–S235JR; Figure 2)
The butt surfaces were pretreated per EN 13887:2005 (Structural adhesives—Guidelines for surface preparation of metals and plastics prior to adhesive bonding) with steady processing parameters to ensure the geometric repeatability of the surface pretreatment for all specimens
Summary
Joining with adhesives which are sometimes underestimated is a major complement to the traditional techniques of joining materials. The final quality of an adhesive joint depends on its operating conditions, both in terms of the behaviour of the joint, the joint’s operating temperature and its range of variation, the operating humidity, and more. These issues belong to different scientific disciplines, adhesive bonding can be called an interdisciplinary process, which combines chemistry, physics, and mechanics [3,4,5,6,7,8,9]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
