TITLE:
Characterization of Face Sheet/Core Debonding Strength in Sandwiched Medium Density Fiberboard
AUTHORS:
Mohamed K. Hassan
KEYWORDS:
Double Cantilever Beam, Delamination, Face Sheet/Core, Medium Density Fiberboard
JOURNAL NAME:
Materials Sciences and Applications,
Vol.8 No.9,
August
25,
2017
ABSTRACT: Medium density fiberboard
(MDF) is a highly competitive wooden material especially in office furniture
industry. Damage and failure occur frequently in MDF due to low mechanical
properties. In the present work, a modification was performed to enhance fracture
properties of MDF. The MDF plate/core was inserted into two layers (face sheet)
of glass fiber composite laminates using hand layup technique. Face sheet/core
delamination involves the separation of a face sheet from the core material in
a sandwich MDF. Therefore, delamination test using double cantilever beam (DCB)
specimen was carried out. The test measured the debonding fracture toughness (GIC)
or separation strength between face sheet material (glass fiber/epoxy
laminates) with MDF core material. The test is based on compliance strategy
measuring fracture toughness (GIC). It was found that the fracture
toughness was increased. Extended finite element model (XFEM) based on virtual
crack closer technique (VCCT) was constructed to simulate the delamination
behaviors of face sheet/core materials. The model results were in good
agreement with the experimental ones.