Study on the fatigue experiment of TDCB aluminum foam specimen bonded with adhesive

Abstract

In this study, TDCB specimen adhesively bonded with aluminum foam, which is the porous metallic material, is fabricated and critical fracture energy is measured in accordance with British standards (BS 7991 and ISO 11343). The specimens are classified by m value into 2, 2.5, 3, and 3.5 for comparison. “m refers to gradient which is expressed in the length (a) and (height) of the specimen. According to the result of reviewing axial displacement graph on crack length, displacement tends to increase in line with a growing crack, and the less the value of m, the higher the displacement. On the other hand, energy release rate tends to increase based on developing cracks, and the less the value of m, the higher the energy release rate. Based on correlations obtained in this study, the fracture behavior of bonding material is analyzed and aluminum foam material bonded using adhesive is applied to a composite structure in various fields, thereby analyzing the mechanical and fracture characteristics of the material.