Low speed impact behaviour of adhesively bonded foam-core sandwich T-joints. Issue 3 (1st February 2019)

• Record Type: Journal Article
• Authors: Caliskan, Umut; Apalak, M. Kemal
• Is Part Of: Journal of adhesion science and technology. Volume 33:Issue 3(2019)
• Page Start: 217
• Page End: 242
• Publication Date: 2019-02-01
• Subjects: Adhesively bonded sandwich T-joint -- impact -- PVC foam -- explicit finite element method -- cohesive zone modelling; Adhesion -- Periodicals; Adhesives -- Periodicals; 668.3
• DOI: 10.1080/01694243.2018.1529882
• Languages: English
• ISSNs: 0169-4243

Abstract

Abstract: This paper investigates the effects of foam core density and aluminum skin plates on the low speed impact behaviour of adhesively bonded sandwich T-joints having a PVC foam core and aluminum face-sheets. The dynamic response of adhesively bonded sandwich T-joints was analyzed by the explicit finite element method. Two different material models were implemented to the foam core material: a hyperelastic model and a crushable foam material with ductile damage whereas the aluminum face-sheets were modelled as an elasto-plastic material. The cohesive response of adhesive interfaces was included using three dimensional cohesive element based on cohesive zone model. Adhesively bonded sandwich T-joint specimens were manufactured and tested to validate the numerical model. A very good agreement between the experimental and FE results were achieved. The density of the foam core material of adhesively bonded sandwich T-joint played important role on the joint failure mechanism. The joint having a stiffer foam core experienced more damage in both stiffener panel and adhesive layers.