Akademik Veri Yönetim Sistemi
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, cilt.25, sa.19, ss.2587-2613, 2011 (SCI-Expanded)
This study investigates the effect of adhesive thickness on the transverse low-speed impact behavior of adhesively bonded similar (Al-Al, St-St) and dissimilar (Al-St, St-Al) clamped plates using the three-dimensional explicit finite element method. The contact force and plastic dissipation histories are studied for various impact energies and adhesive thicknesses. The residual plastic strains in both adhesive layer and the two plates increase with increasing impact energy. The central transverse deflections become maximal in Al-Al, moderate in Al-St, St-Al and minimal in St-St bonded plates. The back plates of all configurations deform noticeably. The stiff steel plate results in a shorter contact time, a higher contact force, a lower plastic dissipation energy and the impact energy is absorbed by the adhesive layer rather than by the front and back plates, whereas Al-Al plates dissipate it as much as the adhesive layer. The total contact time gets longer with increasing impact energy. St-St bonded plates experience larger damaged regions in both plates and adhesive layer than those in Al-Al bonded plates. The adhesive thickness has only a minor effect on the magnitude of the contact force and contact time, whereas a stiffer (St) front or back plate affects considerably the contact force and total contact time. Increasing the adhesive thickness decreases apparently residual plastic strains in plates and the adhesive layer, the central transverse deflection. A thick adhesive layer results in a minor increase in the kinetic energy of impactor, a shorter total contact time, a lower plastic dissipation energy and smaller damaged areas on the back faces of the lower plate, along the adhesive-plate interfaces. (C) Koninklijke Brill NV, Leiden, 2011