6533b871fe1ef96bd12d0e5c
RESEARCH PRODUCT
Evolution Characteristics of Delamination Damage in CFRP Composites Under Transverse Loading
Ainullotfi Abdul-latifX. J. GongMohd Nasir TaminSeyed Saeid Rahimian Koloorsubject
Cohesive zone modelMaterials scienceFlexural strengthComposite numberUltimate tensile strengthDelaminationFlexural rigidityComposite laminatesComposite materialOrthotropic materialdescription
The initiation and subsequent progression of delamination in CFRP composite laminates is examined using finite element method. A 12-ply CFRP composite, with a total thickness of 2.4 mm and anti-symmetric ply sequence is simulated under three-point bend test setup. Each unidirectional composite lamina is treated as an equivalent elastic and orthotropic panel. Interface behavior is defined using cohesive damage model. Complementary three-point bend test on the specimen is performed at crosshead speed of 2 mm/min. The measured load–deflection response at mid-span location compares well with predicted values. Interface delamination accounts for up to 46.7% reduction in flexural stiffness from the undamaged state. Delamination initiated at the center mid-span region for interfaces in the compressive laminates while edge delamination started in interfaces with tensile flexural stress in the laminates. Anti-symmetric distribution of the delaminated region is derived from the corresponding anti-symmetric ply sequence in the CFRP composite. The dissipation energy for edge delamination is greater than that for internal center delamination.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-01 |