A new structural two-component epoxy adhesive: Strength and fracture characterization

Cardoso, M.G.; Pinto, J.E.C.; Campilho, R.D.S.G.; Nóvoa, P.J.R.O.; Silva, Francisco J. G.; Ramalho, L.D.C.

http://hdl.handle.net/10400.22/19528

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Authors

Silva, Francisco J. G.

Ramalho, L.D.C.

Abstract(s)

In the past decades, adhesive technology has been useful in order to solve numerous issues related with conventional joining techniques (bolting, riveting and welding). Several advantages of adhesive bonding can be pointed out, such as low weight (relevant in the automotive and aeronautical industries), capability to resist to adverse environmental conditions, lower manufacturing costs and possibility to join different materials. To predict crack propagation of an adhesive joint by advanced fracture mechanics-based techniques such as cohesive zone models (CZM) it is not enough to know the traditional mechanical properties, such as Young’s modulus (E), shear modulus (G), tensile strength (σf) and shear strength (τf). Actually, it is also mandatory to estimate the tensile (GIC) and shear fracture energies (GIIC). The purpose of this work is to carry out the mechanical and fracture property characterization of a new structural two-component epoxy adhesive. With this purpose, four tests which were conducted: tensile testing to bulk specimens, shear testing with thick adherend shear tests (TAST), double-cantilever beam (DCB) and end-notched flexure (ENF). With these tests, it was possible to determine the mechanical and fracture properties of the adhesive in tension and shear. Different data reduction methods were evaluated for the fracture properties. The test results agreed with the data provided by the manufacturer and will enable the design of bonded structures with this adhesive.

Description

30th International Conference on Flexible Automation and Intelligent Manufacturing (FAIM2021) -15-18 June 2021, Athens, Greece

Keywords

Structural adhesive Bulk specimens Thick Adherend Shear Test Fracture toughness

URI

http://hdl.handle.net/10400.22/19528

Citation

Cardoso, M. G., Pinto, J. E. C., Campilho, R. D. S. G., Nóvoa, P. J. R. O., Silva, F. J. G., & Ramalho, L. D. C. (2020). A new structural two-component epoxy adhesive: Strength and fracture characterization. Procedia Manufacturing, 51, 771-778. DOI 10.1016/j.promfg.2020.10.108