The consortium consists of the following partners: PROFACTOR, DASSAULT SYSTÈMES SE, MTORRES sistemas industriales, DANOBAT, IK4-IDEKO, AIRBUS DEFENSE&SPACE GmbH and FIDAMC.
The aim of ZAero “Zero defect manufacturing of composite parts in the aerospace industry” project is the development of inline quality control methods for carbon fibre parts production (CFRP) to achieve:
The ZAero system provides an inline and automatic system to detect defects during the manufacturing through sensors. The objective of the control system with sensors is to reach TRL 6-7 during the manufacturing trials at FIDAMC.
The control is performed during the manufacturing process of a stiffened surface panel:
The ZAero control system acts on 2 steps of the manufacturing processes: Lay-up and infusion-curing.
The inline inspection that will perform the control system is shown in the Figure 3.
Operators will inspect and act only when the error is detected by sensors. Several defects can be detected as angle deviation; late add, early cut and early add, late cut; missing tow; splices; gaps and overlaps; twist-DFP; fuzzball; defects in z-direction.
The control system has two sensors:
Porosity can be generated during the infusion and curing processes.
The sensor used to monitor infusion and curing processes is based on Electrical Time Domain Reflectometry (E-TDR) .
Two different technologies of automated lay-up which have similar needs for inspection will used:
The machine will laminate with 8 tows of uniaxial material (12.7mm of width). Carbon fabric tows are very malleable themselves so as to make them manageable for manufacturing issues, they include binder onto their surfaces.
Multiaxial material with a width of 600mm will be placed. The tow curvature is lower in comparison with weave fabrics. The material has better mechanical properties.
The resin that will be used in the infusion and curing processes is a thermoset liquid epoxy resin.
Resin infusion processes techniques undergo both impregnation of the textile reinforcement and curing in the same moulding operation, thus providing cost reductions compared to prepreg technology.
The resin is enabling the parts to keep their final shape via chemical reaction (polymerization). Epoxy is a very versatile resin system, allowing a broad range of properties and processing capabilities.
Three parts will be manufactured. The degree of complexity will be increased in each demonstrator.
This demonstrator part is mainly focused to test lay-up monitoring.
Defects will be induced during the manufacturing to assess the defect detection capabilities of the inline sensor systems.
A prototype system for inline quality control will be demonstrated.
Second demo is oriented not only towards lay-up inspection, but also for curing monitoring. The dimensions of Demo 2 will be 1700x1700mm.
The demo part proposed is based on double curvature in order to identify potential lay-up defects as excessively wide gaps, overlaps, fuzz balls, twisted yarns, or other defects.
An intermediate version of the inline quality support will be demonstrated.
The third demo part is designed as demo part 2, but including three integrated stringers. These stringers have been defined as 3 “T” shape stringers:
The integration of the stringers in the demo part is necessary in order to test a real case of a stiffened panel for the infusion process.
A full version of the inline quality support will be demonstrated.
1st Demonstration will be planned to month 12 (October 2017).
2nd Demonstration will be planned to month 24 (October 2018).
3rd Demonstration will be planned to month 36 (October 2019).
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 721362.
[() ] ZAero-Grant Agreement(http://www.zaero-project.eu).
 BUCHMANN, C., FILSINGER, J. and LADSTÄTTER, E.: Investigation of Electrical Time Domain Reflectometry for Infusion and Cure Monitoring in Combination with Electrically Conductive Fibers and Tooling Materials. Composites Part B: Engineering, 94: 389-398 (2016).
Published on 29/04/18
Accepted on 29/04/18
Submitted on 29/04/18
Volume 02 - Comunicaciones Matcomp17 (2018), Issue Num. 2 - Aplicaciones y compuestos multifuncionales, 2018
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