Investigation on the mechanical properties of resin pin-reinforced marine sandwich composite structures under quasi-static indentation load

Authors : Fatih Balıkoğlu, Tayfur Kerem Demircioğlu, Mehmet Özer, Ali Işıktaş

Pages : 690-696

Doi:10.28948/ngumuh.1432063

View : 72 | Download : 50

Publication Date : 2024-04-15

Article Type : Research Paper

Abstract :This study aims to experimentally examine the indentation behaviour of marine sandwich composites with pin-reinforced polyvinyl chloride foam core and E-glass face sheets. The effects of indenter diameter, resin pin diameter, and arrangement on force-displacement, maximum contact force, and absorbed energy values of sandwich panels were evaluated by the indentation tests. Throughout the experiments, the contact forces increased as the pin diameter increased from Ø2 mm to Ø4 mm. The contact forces decreased as the distance between pin diameters increased from 12 mm to 16 mm and 18 mm. Additionally, the values of absorbed energy increased as the diameters of the resin pin and indenter increased. Placing pins at a distance of 12 mm allows the material to absorb more energy for Ø12.7 mm and Ø20 mm indenter tips. The 8 mm diameter and 12 mm spacing holes provide significant initial resistance to penetration, despite the increase in weight in critical areas, against object contact from Ø12.7 to Ø20 mm. A visual inspection took place on the post-indentation cross-sections of the sandwich specimens to detect any damage modes. Damage modes varied depending on the size of the indenter and the hole pattern in the foam core.
Keywords : Sandviç kompozit, Pim takviyesi, PVC köpük, Batma