|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Characterization of Cohesive Zone Model Properties of Laminated Metal Sheet with a Thin Adhesive Layer
||Hyeonil Park, Se-Jong Kim, Jinwoo Lee, Daeyong Kim
|On-Site Speaker (Planned)
Double cantilever beam (DCB) test associated with measurement of crack tip opening displacement (CTOD) is a practical method to experimentally evaluate cohesive zone model (CZM) properties in mode I. However, it has an obvious limitation that does not allow the plastic deformation of adherends during the test, making it difficult to evaluate the polymer layer inserted in the laminated metal sheet comprising thin metal sheets which are vulnerable to the plastic deformation. This paper provides an experimental technique for evaluating the mode I CZM properties of ductile adhesive layers inserted in the laminated metal sheet, while suppressing the plastic deformation of the thin metal adherends. To suppress the plastic deformation of the thin adherends during the DCB test, the supporting tools were designed and bonded to the both outer surfaces of the laminated metal sheet. Until delamination occurred, the evolution of fracture toughness (G) was evaluated, and the CTOD was measured in the stereo image using a digital image correlation system. Then, a traction (T)–separation (δ) law in mode I was established based on the differentiation of the relation between the evolution of G and CTOD. Finally, the mode I CZM properties were successfully obtained from the bilinear fitted T–δ law.
||Definite: At-meeting proceedings