Crack propagation in the Double Cantilever Beam using Peridynamic theory


Yolum U., Bozkurt M. O. , Gok E., ÇÖKER D., Gueler M. A.

COMPOSITE STRUCTURES, vol.301, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 301
  • Publication Date: 2022
  • Doi Number: 10.1016/j.compstruct.2022.116050
  • Journal Name: COMPOSITE STRUCTURES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Peridynamic theory, Double cantilever beam test, Mode-I delamination, Composite, Multidirectional laminates, DELAMINATION MIGRATION, GROWTH, FIBER, MODEL
  • Middle East Technical University Affiliated: Yes

Abstract

In this study, Peridynamic (PD) theory is used to model mode-I delamination in unidirectional and multi-directional laminated composites. Experiments are conducted to determine mode-I fracture toughness in a unidirectional carbon-epoxy Double Cantilever Beam (DCB) specimen where the crack propagation remains on the original notch plane. The PD model of the DCB geometry is generated using an in-house pre-processor code in MATLAB and implemented in ABAQUS software. The brittle damage law in the original PD model is modified to a bilinear law to capture progressive softening. PD results are found to be in good agreement with the experimental results in terms of force-displacement curves and crack length. Next, this PD approach is applied to a multidirectional angle-ply DCB specimen. The PD model shows that delamination path jumps between the layers as the delamination grows. Force-displacement behaviour and delamination patterns obtained using PD model are compared with the corresponding experimental results from Gong et al. (2018). As a result, PD theory with bilinear softening law is found to successfully capture force-displacement relations and delamination migration in multidirectional laminated composites under mode-I loading conditions.