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Quasi-static and Dynamic Lap Shear Strength of Aluminium Joints Bonded with Epoxy/Alumina Nanocomposite Adhesive

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Quasi-static shear strength of aluminium alloy single lap joints was determined as a function of wt% (0.5, 1.0, 1.5, and 2.0) of spherical and rod shaped nanoalumina in epoxy adhesive under compressive loading. Static shear strength for nanoadhesive containing 1.5 wt% of nanoparticles (for both spherical and rod shaped nanoalumina) was observed to be maximum. Dynamic shear strength for neat adhesive and nanoadhesives containing 1.5 wt% of spherical and rod shaped nanoalumina were analysed at two different loading rates using a split Hopkinson pressure bar system. A significant improvement (3 to 7 times) of dynamic shear strength of joints was perceived over static shear strength of joints. Static and dynamic lap shear strength for nanoadhesive containing nanospheres were significantly more than that for neat adhesive and nanoadhesive containing nanorods.

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The authors gratefully acknowledge the High Speed Experimental Mechanics Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Kanpur, India for providing the facility of dynamic testing. Authors specially thanks the Motilal Nehru National Institute of Technology Allahabad, Prayagraj, India, for giving the financial support under plan grant (No. 248/R&C/14-15, 2014).

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Correspondence to Sunil Kumar Gupta.

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The contact interface surfaces between joints and platens/ bars were lubricated with grease to reduce the friction and to achieve the uniform radial deformation. Figure 12 shows the loading arrangement of specimen on Universal Testing Machine for quasi-static testing. Figure 13 Shows SLJ sandwiched between incident and transmitted bars of SHPB in dynamic test.

Fig. 12

Single lap joint loaded on a universal testing machine in quasi-static test

Fig. 13

Single lap joint sandwiched between incident and transmitted bars of SHPB in dynamic test

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Gupta, S.K., Shukla, D.K. Quasi-static and Dynamic Lap Shear Strength of Aluminium Joints Bonded with Epoxy/Alumina Nanocomposite Adhesive. J. dynamic behavior mater. (2020). https://doi.org/10.1007/s40870-020-00235-x

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  • Dynamic shear strength
  • Epoxy adhesive
  • Single lap joint
  • Shape of nanoalumina