Low speed impact behaviour of adhesively bonded foam-core sandwich T-joints


ÇALIŞKAN U. , APALAK M. K.

JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, vol.33, no.3, pp.217-242, 2019 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 3
  • Publication Date: 2019
  • Doi Number: 10.1080/01694243.2018.1529882
  • Title of Journal : JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
  • Page Numbers: pp.217-242

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.