Work

Characterisation of near pure mode II quasi-static and fatigue delamination behaviour of a carbon–glass interface using a pure-moment-loaded DCB test rig

Year: 2024

Type: article

Abstract: This work covers the characterisation of delamination growth in a carbon–glass interface, representative of the one in a wind turbine blade. A pure-moment-loaded Double Cantilever Beam (DCB) test rig is used under quasi-static and fatigue loading. A new fatigue characterisation procedure is adopted by real-time controlling the prescribed energy release rate G. This procedure enables sweeping any desired G range at a user-defined rate independently of the compliance of the specimen. A finite element simulation using a cohesive zone model confirms the testing was performed at near pure mode II conditions. From the quasi-static tests, the onset and steady-state fracture toughnesses are characterised. Fibre bridging is observed, which is believed to explain the characterised R-curve effect. From the fatigue tests, Paris’ law is characterised in a wide Gmax range in each test. The characterisation of the quasi-static and fatigue fracture behaviour of the carbon-glass interface is thus successfully achieved.

Source: Composites Part A Applied Science and Manufacturing

DOI: 10.1016/j.compositesa.2024.108625

Authors: Iñigo Urcelay Oca, Simon Mosbjerg Jensen, Brian Lau Verndal Bak, Fahimeh Shakibapour, Esben Lindgaard

Institution: Aalborg University

Language: English

Topic: Mechanical Behavior of Composites

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,520

Funders: Innovationsfonden, European Commission, Horizon 2020 Framework Programme, H2020 Marie Skłodowska-Curie Actions