Assessment of Adhesively Bonded Joints of Similar and Dissimilar Materials: Industrial Case Study

Abstract

Joining similar or dissimilar materials has recently become a hot topic in industries. In this study, an adhesive technique was used to join plastic materials produced by additive manufacturing (3D printing) with metal materials. The effects of the type of material that forms the joint pairs on the joint strength were investigated. In addition, a case study was carried out on the “rubber-metal buffer” part, which is a rubber industry product. The “rubber-metal buffer” part, traditionally produced by vulcanization, was re-manufactured by changing the body material and production technique. Samples were produced from Tough PLA and TPU materials using a 3D printer at 80% and 100% fill rates. Adhesive joints were made by bonding dissimilar (Tough PLA/Galvanized steel, TPU/Galvanized steel, Tough PLA/TPU) and similar materials (Tough PLA/Tough PLA, TPU/TPU, Galvanized steel/Galvanized steel) using Loctite 9466 adhesive. The mechanical properties of the joints were determined using tensile and hardness tests, and then the damage mechanisms were examined. The highest strength value in similar material pairs (3D printed) was found in Tough PLA/Tough PLA joints (4 MPa). In dissimilar material pairs, the highest strength value was determined to be Tough PLA/Galvanized steel (4.17 MPa). As a result, it was found that TPU and Tough PLA materials produced by 3D printing can be used as an alternative to rubber.

Optimization of Charpy Impact Strength of Tough PLA Samples Produced by 3D Printing Using the Taguchi Method

“…This study utilized tough PLA filament, developed as an alternative to difficult-to-print ABS filaments for professional users, increasing the impact strength by about three times compared to standard PLA filaments [ 30 , 31 ]. Tough PLA overcomes the shrinkage and warping problems of ABS material with the ease of printing.…”

Quality Analysis of Bonded Joints in the Renovation of Plastic Automotive Parts

“…Research and a more detailed review of the different methods used for joining different types of materials have been reviewed by Kah et al [41]. Anaç investigated the mechanical properties of joints using tensile and hardness tests, where the materials investigated were samples produced by additive manufacturing with metallic materials [42]. The impact strength of bonded joints was studied by Godzimirski, who used three different epoxy adhesives in his experiments.…”

Use of intumescent flame-retardant systems in epoxy adhesives for debonding purpose

“…Adhesively bonded joints have profoundly influenced material production methods. The construction of materials has transitioned from mechanical joining methods, such as riveting, screwing, and thermal joining (like welding) to systems that bind multiple materials together by incorporating an adhesive layer into the assembly [ 1 , 2 ]. Owing to its ability to combine and thin dissimilar kinds of materials, adhesive bonding has streamlined the development of innovative, lighter-weight assemblies that boast superior mechanical qualities [ 3 ].…”