Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Wrinkle characterisation from Ultrasonic Scans of Composites
Year:2016
Research Areas
  • Aircraft materials,
  • Lightwieght structures
Information
Abstract
Wrinkles (out-of-plane waviness) are, unfortunately, a common phenomenon during composite manufacture and have a significant influence on the mechanical performance. While the aviation industry tries to reduce the thickness of composites for weight reasons, more plies are added to the design in order to mitigate the risk of undetected wrinkles and ensure robust mechanical properties of structures. The aim of this work is to detect and characterise out of plane wrinkles in complex glass-carbon structures using ultrasonic non-destructive tests. The parts to be inspected are made of epoxy resin reinforced with unidirectional carbon fibre and woven glass fibre. In order to determine the ideal probe frequency and bandwidth with which the inspections must be made, the resonant frequency of the plies was determined using a MATLAB-based analytical model. The parts were then inspected using full-matrix capture (FMC) and the total focusing method (TFM) as well as a commercial phased-array instrument providing data that can be inverted to give out-of-plane ply direction. Finally, the amplitude of the wrinkle was measured visually on the samples and compared with the ultrasonic measurements to determine the accuracy of the proposed method.
International
Si
Congress
BiNDT 2016
960
Place
Nottingham UK
Reviewers
Si
ISBN/ISSN
Start Date
12/09/2016
End Date
14/09/2016
From page
To page
Participants
  • Autor: Beatriz Maria Larrañaga Valsero (UPM)
  • Autor: Robert A. Smith (University of Bristol)
  • Autor: Rostand B. Tayong (University of Bristol)
  • Autor: Antonio Fernandez Lopez (UPM)
  • Autor: Alfredo Güemes (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Materiales y Producción Aeroespacial
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)