Abstract
The use of adhesive to joint structural elements, despite many advantages of this technology, is not a method commonly used in engineering practice, especially in construction. This is mainly due to the poor recognition of the behavior, both in terms of testing and analysis, of joints made on a scale similar to the actual elements of building structures. Therefore, this paper presents the results of model tests and then numerical analyses of adhesively bonded joints made of high-strength steel elements in a full-scale (double-lap joint). In order to properly model the adhesive connection, material tests of the methacrylate adhesive were performed in the field of tensile, shear (in two versions: single lap joint test and thick adherent shear test) and bond properties. Comparison of the results of the model and numerical tests showed very good agreement in terms of the measurable values, which makes it possible to consider the results obtained in the adhesive layer as reliable (not directly measurable in model tests). In particular, the distribution of stresses inside the adhesive layer, the range of plastic zones and areas of loss of adhesion are presented and discussed. The results indicate the possibility of a reliable representation of the behavior of adhesively bonded joints of high-strength steel, thus providing a tool for the analysis of semirigid adhesive in large-size joints.
Highlights
The first structural adhesively bonded joints were employed as early as the first half of the twentieth century [1]
When elements of XFEM are used, the type of the finite element does not need to be the same as in the continuous model, so it is possible to Materials 2022, 15, 330 refine the finite element mesh over the bond thickness
The steel specimens were made of steel Domex 700 and were tested according to PN-EN ISO 6892-1:2016 recommendation [36]
Summary
The first structural adhesively bonded joints were employed as early as the first half of the twentieth century [1]. Epoxy resins were used mostly in the aeronautics industry [2,3]. They found their way into the automotive [4,5] and even construction industries [6]. The dynamic advancements in welded joints in the second half of the twentieth century led to the abandonment of adhesively bonded joints for steel structures. They were not researched or used at a significant scale. The most popular of these applications are epoxy adhesives, which are strong, stiff, and well researched in terms of necessary mechanical characteristics [13,14,15]
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