Keywords
impact strength of adhesive joints
new impact testing method
How to Cite
Abstract
The usefulness of the proprietary method of testing the impact strength of adhesive joints under shear loads was checked. An adhesively bonded lap sample of flat bars with a thickness of 5 mm, loaded on the side surface of the overlap, was proposed. Numerical calculations have shown that in such a loaded lap joint, shear stresses dominate. Impact tests of such specimens can be performed on conventional Charpy hammers. The conducted experimental tests showed high reproducibility of the results of such tests and as expected, higher destruction energy of flexible adhesive and adhesive layers of greater thickness was obtained.
References
Adams R.D., Comyn J. Wake W.C. 1997. Structural adhesive joint in engineering, Springer Science & Business Media, London .
Higgins A. 2009. “Adhesive bonding of aircraft structures” Int J Adhesion Adhesive 20: 367-376, 10.1016/S0143-7496(00)00006-3.
da Silva L.F.M., Öchsner A., Adams R.D. (Eds.), Handbook of adhesion technology, Springer, Heidelberg 2011.
Grant L.D.R., Adams R.D., da Silva L.F.M. 2009 “Experimental and numerical analisys of single-lap joints for the automotive industry” International Journal of Adhesion and Adhesives 29 (4): 405-413.
Galvez P. Quesada A., Martinez M.A., Abenojar J., Boada M.J.L., Diaz V. 2017 “Study of the behaviour of adhesive joints of steel with CFRP for its application in bus structures” Composites Part B: Engineering 129: 41-46.
Machado J.J.M., Marques E.A.S., Silva M.R.G., da Silva Lucas F.M. 2018 “Numerical study of impact behaviour of mixed adhesive single lap joints for the automotive industry” International Journal of Adhesion and Adhesives 84: 92-100.
Adams R.D., Harris J.A. 1996 “A critical assessment of the block impact test for measuring the impact strength of adhesive bonds” International Journal of Adhesion and Adhesives 16: 61-71.
Taylor A. 1996 Impact Testing of Adhesive Joints. MTS Adhesive Project 2 AEA Technology, 5 (2).
Asgharifar M, Kong F, Carlson, B, Kovacevic R. 2014 “Dynamic analysis of adhesively bonded joint under solid projectile impact” International Journal of Adhesion and Adhesives 50: 17–31.
ISO 11343 – Adhesive. Determination of dynamic resistance of high-strength adhesive joints to separation under impact conditions - Wedge impact method
Blackman B.R.H, Kinloch A.J, Taylor A.C, Wang Y. 2000 “The impact wedge-peel performance of structural adhesives” J. Materials Science 35: 1867-1884.
Gyeong-Seok Chae, Hee-Woong Park, Jung-Hyun Lee, Seunghan Shin 2020 “Comparative Study on the Impact Wedge-Peel Performance of Epoxy-Based Structural Adhesives Modified with Different Toughening Agents” Polymers 12, 1549; doi:10.3390/polym12071549.
Adamvalli M., Parameswaran V. 2008 “Dynamic strength of adhesive single lap joints at high temperature” International Journal of Adhesion and Adhesives 28: 321-327.
Raykhere S.L., Kumar P., Singh R.K., Parameswaran V. 2010 “Dynamic shear strength of adhesive joints made of metallic and composite adherents” Material and Design 31: 2102-2109.
Komorek A., Godzimirski J. 2021 “Modified pendulum hammer in impact tests of adhesive, riveted and hybrid lap joints” International Journal of Adhesion and Adhesives 104 https://doi.org/10.1016/j.ijadhadh.2020.102734
Komorek A., Godzimirski J. 2016 “The selected aspects of the research into impact loading of adhesive joints in block samples - comparison of different ways of applying the load” Maintenance Problems 103 (4): 77-91.
Komorek A., Godzimirski J., Rośkowicz M. 2020 “Analysis of new shape of test specimen for block shear impact test” Materials 13 1693; https://doi.org/10.3390/ma13071693
Rośkowicz M, Godzimirski J., Komorek A., Jasztal M. 2021 “The Effect of Adhesive Layer Thickness on Joint Static Strength” Materials, 14 (6), 1499; https://doi.org/10.3390/ma14061499