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Delamination Behaviour of Embedded Polymeric Sensor and Actuator Carrier Layers in Epoxy Based CFRP Laminates-A Study of Energy Release Rates
- Source :
- Polymers, Polymers, Vol 13, Iss 3926, p 3926 (2021), Volume 13, Issue 22
- Publication Year :
- 2021
-
Abstract
- Fiber reinforced composites combine low density with high specific mechanical properties and thus became indispensable for today’s lightweight applications. In particular, carbon fibre reinforced plastic (CFRP) is broadly used for aerospace components. However, damage and failure behaviour, especially for complex fibre reinforcement set-ups and under impact loading conditions, are still not fully understood yet. Therefore, relatively large margins of safety are currently used for designing high-performance materials and structures. Technologies to functionalise the materials enabling the monitoring of the structures and thus avoiding critical conditions are considered to be key to overcoming these drawbacks. For this, sensors and actuators are bonded to the surface of the composite structures or are integrated into the composite lay-up. In case of integration, the impact on the mechanical properties of the composite materials needs to be understood in detail. Additional elements may disturb the composite structure, impeding the direct connection of the composite layers and implying the risk of reducing the interlaminar integrity by means of a lower delamination resistance. In the presented study, the possibility of adjusting the interface between the integrated actuator and sensor layers to the composite layers is investigated. Different polymer layer combinations integrated into carbon fibre reinforced composite layups are compared with respect to their interlaminar critical energy release rates GIc and GIIc. A standard aerospace unidirectionally reinforced (UD) CFRP prepreg material was used as reference material configuration. The investigations show that it is possible to enhance the mechanical properties, especially the interlaminar energy release rate by using multilayered sensor–actuator layers with Polyimide (PI) outer layers and layers with low shear stiffness in between.
- Subjects :
- Materials science
Polymers and Plastics
Composite number
Organic chemistry
02 engineering and technology
Fiber-reinforced composite
01 natural sciences
Article
QD241-441
sensor embedding
0103 physical sciences
intelligent composites
carrier foil
Composite material
010302 applied physics
Strain energy release rate
Delamination
delamination behaviour
General Chemistry
Epoxy
Fibre-reinforced plastic
021001 nanoscience & nanotechnology
visual_art
visual_art.visual_art_medium
integrated sensor systems
0210 nano-technology
Actuator
function-integrative composites
Polyimide
Subjects
Details
- ISSN :
- 20734360
- Volume :
- 13
- Issue :
- 22
- Database :
- OpenAIRE
- Journal :
- Polymers
- Accession number :
- edsair.doi.dedup.....8510e44c275f69d072ab4f4cf9a36224