---
_id: '1995'
abstract:
- lang: eng
  text: The repair of carbon fibre reinforced polymer structures of aircraft is increasingly
    conducted on site. Monitoring the curing process of polymers has the potential
    to decrease repair costs by time optimisation and quality control. In this paper
    Lamb waves are utilised to determine the degree of cure. Waves are excited and
    recorded by two piezoelectric transducers, one serving as an actuator and the
    other as a sensor. The recorded signals are processed with a complex wavelet transform,
    which allows more accurate feature extraction than calculating features in time
    domain. Extracted features are the transmitted signal energy of the wave and the
    resonance frequency of the curing polymer. Waves are excited at different frequencies
    to identify the current resonance frequency. Excitation at or near the current
    resonant frequency ensures that curing is monitored with maximum sensitivity.
author:
- first_name: Christoph-Alexander
  full_name: Holst, Christoph-Alexander
  id: '64782'
  last_name: Holst
- first_name: Kristian
  full_name: Röckemann, Kristian
  last_name: Röckemann
- first_name: Andreas
  full_name: Steinmetz, Andreas
  id: '55232'
  last_name: Steinmetz
- first_name: Volker
  full_name: Lohweg, Volker
  id: '1804'
  last_name: Lohweg
  orcid: 0000-0002-3325-7887
citation:
  ama: 'Holst C-A, Röckemann K, Steinmetz A, Lohweg V. Lamb wave-based Cure Monitoring
    of Carbon Fibre Reinforced Polymers for On-site Aircraft Repairs. In: <i>5th IEEE
    International Forum on Research and Technologies for Society and Industry</i>.
    Firenze, Italy; 2019.'
  apa: Holst, C.-A., Röckemann, K., Steinmetz, A., &#38; Lohweg, V. (2019). Lamb wave-based
    Cure Monitoring of Carbon Fibre Reinforced Polymers for On-site Aircraft Repairs.
    In <i>5th IEEE International Forum on Research and Technologies for Society and
    Industry</i>. Firenze, Italy.
  bjps: <b>Holst C-A <i>et al.</i></b> (2019) Lamb Wave-Based Cure Monitoring of Carbon
    Fibre Reinforced Polymers for On-Site Aircraft Repairs. <i>5th IEEE International
    Forum on Research and Technologies for Society and Industry</i>. Firenze, Italy.
  chicago: Holst, Christoph-Alexander, Kristian Röckemann, Andreas Steinmetz, and
    Volker Lohweg. “Lamb Wave-Based Cure Monitoring of Carbon Fibre Reinforced Polymers
    for On-Site Aircraft Repairs.” In <i>5th IEEE International Forum on Research
    and Technologies for Society and Industry</i>. Firenze, Italy, 2019.
  chicago-de: 'Holst, Christoph-Alexander, Kristian Röckemann, Andreas Steinmetz und
    Volker Lohweg. 2019. Lamb wave-based Cure Monitoring of Carbon Fibre Reinforced
    Polymers for On-site Aircraft Repairs. In: <i>5th IEEE International Forum on
    Research and Technologies for Society and Industry</i>. Firenze, Italy.'
  din1505-2-1: '<span style="font-variant:small-caps;">Holst, Christoph-Alexander</span>
    ; <span style="font-variant:small-caps;">Röckemann, Kristian</span> ; <span style="font-variant:small-caps;">Steinmetz,
    Andreas</span> ; <span style="font-variant:small-caps;">Lohweg, Volker</span>:
    Lamb wave-based Cure Monitoring of Carbon Fibre Reinforced Polymers for On-site
    Aircraft Repairs. In: <i>5th IEEE International Forum on Research and Technologies
    for Society and Industry</i>. Firenze, Italy, 2019'
  havard: 'C.-A. Holst, K. Röckemann, A. Steinmetz, V. Lohweg, Lamb wave-based Cure
    Monitoring of Carbon Fibre Reinforced Polymers for On-site Aircraft Repairs, in:
    5th IEEE International Forum on Research and Technologies for Society and Industry,
    Firenze, Italy, 2019.'
  ieee: C.-A. Holst, K. Röckemann, A. Steinmetz, and V. Lohweg, “Lamb wave-based Cure
    Monitoring of Carbon Fibre Reinforced Polymers for On-site Aircraft Repairs,”
    in <i>5th IEEE International Forum on Research and Technologies for Society and
    Industry</i>, 2019.
  mla: Holst, Christoph-Alexander, et al. “Lamb Wave-Based Cure Monitoring of Carbon
    Fibre Reinforced Polymers for On-Site Aircraft Repairs.” <i>5th IEEE International
    Forum on Research and Technologies for Society and Industry</i>, 2019.
  short: 'C.-A. Holst, K. Röckemann, A. Steinmetz, V. Lohweg, in: 5th IEEE International
    Forum on Research and Technologies for Society and Industry, Firenze, Italy, 2019.'
  ufg: '<b>Holst, Christoph-Alexander et. al. (2019)</b>: Lamb wave-based Cure Monitoring
    of Carbon Fibre Reinforced Polymers for On-site Aircraft Repairs, in: <i>5th IEEE
    International Forum on Research and Technologies for Society and Industry</i>,
    Firenze, Italy.'
  van: 'Holst C-A, Röckemann K, Steinmetz A, Lohweg V. Lamb wave-based Cure Monitoring
    of Carbon Fibre Reinforced Polymers for On-site Aircraft Repairs. In: 5th IEEE
    International Forum on Research and Technologies for Society and Industry. Firenze,
    Italy; 2019.'
date_created: 2019-11-22T12:51:16Z
date_updated: 2023-03-15T13:49:38Z
department:
- _id: DEP5023
language:
- iso: eng
place: Firenze, Italy
publication: 5th IEEE International Forum on Research and Technologies for Society
  and Industry
status: public
title: Lamb wave-based Cure Monitoring of Carbon Fibre Reinforced Polymers for On-site
  Aircraft Repairs
type: conference
user_id: '74004'
year: 2019
...
---
_id: '2003'
abstract:
- lang: eng
  text: On-site aircraft repairs are gaining in importance due to the susceptibility
    of carbon fibre reinforced polymers to damage. Repairs themselves are required
    to be inspected for quality, preferably cost- and time-efficiently. This paper
    presents an approach for the inspection of repaired composites based on guided
    Lamb waves. The focus is on cost-effective signal excitation and effective signal
    processing. Lamb waves are excited with piezoelectric transducers at the resonance
    frequency of the material under test. Measured signals are processed with a complex
    wavelet transform to improve damage detection. The proposed approach is evaluated
    on two test specimens, one of which has a defect in the adhesive bond.
author:
- first_name: Christoph-Alexander
  full_name: Holst, Christoph-Alexander
  id: '64782'
  last_name: Holst
- first_name: Kristian
  full_name: Röckemann, Kristian
  last_name: Röckemann
- first_name: Andreas
  full_name: Steinmetz, Andreas
  id: '55232'
  last_name: Steinmetz
- first_name: Volker
  full_name: Lohweg, Volker
  id: '1804'
  last_name: Lohweg
  orcid: 0000-0002-3325-7887
citation:
  ama: 'Holst C-A, Röckemann K, Steinmetz A, Lohweg V. Lamb Wave-based Quality Inspection
    of Repaired Carbon Fibre Reinforced Polymers for On-Site Aircraft Maintenance.
    In: <i>24nd IEEE International Conference on Emerging Technologies and Factory
    Automation (ETFA2019)</i>. Zaragoza, Spain; 2019.'
  apa: Holst, C.-A., Röckemann, K., Steinmetz, A., &#38; Lohweg, V. (2019). Lamb Wave-based
    Quality Inspection of Repaired Carbon Fibre Reinforced Polymers for On-Site Aircraft
    Maintenance. In <i>24nd IEEE International Conference on Emerging Technologies
    and Factory Automation (ETFA2019)</i>. Zaragoza, Spain.
  bjps: <b>Holst C-A <i>et al.</i></b> (2019) Lamb Wave-Based Quality Inspection of
    Repaired Carbon Fibre Reinforced Polymers for On-Site Aircraft Maintenance. <i>24nd
    IEEE International Conference on Emerging Technologies and Factory Automation
    (ETFA2019)</i>. Zaragoza, Spain.
  chicago: Holst, Christoph-Alexander, Kristian Röckemann, Andreas Steinmetz, and
    Volker Lohweg. “Lamb Wave-Based Quality Inspection of Repaired Carbon Fibre Reinforced
    Polymers for On-Site Aircraft Maintenance.” In <i>24nd IEEE International Conference
    on Emerging Technologies and Factory Automation (ETFA2019)</i>. Zaragoza, Spain,
    2019.
  chicago-de: 'Holst, Christoph-Alexander, Kristian Röckemann, Andreas Steinmetz und
    Volker Lohweg. 2019. Lamb Wave-based Quality Inspection of Repaired Carbon Fibre
    Reinforced Polymers for On-Site Aircraft Maintenance. In: <i>24nd IEEE International
    Conference on Emerging Technologies and Factory Automation (ETFA2019)</i>. Zaragoza,
    Spain.'
  din1505-2-1: '<span style="font-variant:small-caps;">Holst, Christoph-Alexander</span>
    ; <span style="font-variant:small-caps;">Röckemann, Kristian</span> ; <span style="font-variant:small-caps;">Steinmetz,
    Andreas</span> ; <span style="font-variant:small-caps;">Lohweg, Volker</span>:
    Lamb Wave-based Quality Inspection of Repaired Carbon Fibre Reinforced Polymers
    for On-Site Aircraft Maintenance. In: <i>24nd IEEE International Conference on
    Emerging Technologies and Factory Automation (ETFA2019)</i>. Zaragoza, Spain,
    2019'
  havard: 'C.-A. Holst, K. Röckemann, A. Steinmetz, V. Lohweg, Lamb Wave-based Quality
    Inspection of Repaired Carbon Fibre Reinforced Polymers for On-Site Aircraft Maintenance,
    in: 24nd IEEE International Conference on Emerging Technologies and Factory Automation
    (ETFA2019), Zaragoza, Spain, 2019.'
  ieee: C.-A. Holst, K. Röckemann, A. Steinmetz, and V. Lohweg, “Lamb Wave-based Quality
    Inspection of Repaired Carbon Fibre Reinforced Polymers for On-Site Aircraft Maintenance,”
    in <i>24nd IEEE International Conference on Emerging Technologies and Factory
    Automation (ETFA2019)</i>, 2019.
  mla: Holst, Christoph-Alexander, et al. “Lamb Wave-Based Quality Inspection of Repaired
    Carbon Fibre Reinforced Polymers for On-Site Aircraft Maintenance.” <i>24nd IEEE
    International Conference on Emerging Technologies and Factory Automation (ETFA2019)</i>,
    2019.
  short: 'C.-A. Holst, K. Röckemann, A. Steinmetz, V. Lohweg, in: 24nd IEEE International
    Conference on Emerging Technologies and Factory Automation (ETFA2019), Zaragoza,
    Spain, 2019.'
  ufg: '<b>Holst, Christoph-Alexander et. al. (2019)</b>: Lamb Wave-based Quality
    Inspection of Repaired Carbon Fibre Reinforced Polymers for On-Site Aircraft Maintenance,
    in: <i>24nd IEEE International Conference on Emerging Technologies and Factory
    Automation (ETFA2019)</i>, Zaragoza, Spain.'
  van: 'Holst C-A, Röckemann K, Steinmetz A, Lohweg V. Lamb Wave-based Quality Inspection
    of Repaired Carbon Fibre Reinforced Polymers for On-Site Aircraft Maintenance.
    In: 24nd IEEE International Conference on Emerging Technologies and Factory Automation
    (ETFA2019). Zaragoza, Spain; 2019.'
date_created: 2019-11-22T12:54:24Z
date_updated: 2023-03-15T13:49:38Z
department:
- _id: DEP5023
language:
- iso: eng
place: Zaragoza, Spain
publication: 24nd IEEE International Conference on Emerging Technologies and Factory
  Automation (ETFA2019)
status: public
title: Lamb Wave-based Quality Inspection of Repaired Carbon Fibre Reinforced Polymers
  for On-Site Aircraft Maintenance
type: conference
user_id: '74004'
year: 2019
...