JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 60

NDT
Samuel Maillard (Cetim) presented phasedarray acoustic imaging applications for composite products in the boatbuilding industry. The test was carried out by passing a 5 MHz phased-array probe along the surface of the product. Two examples were discussed: abnormal resin distribution during the manufacturing process (Fig. 6) along with a mat delamination leading to a fault could be observed quickly and easily (Fig. 7). The technique also makes it possible to monitor damage by delamination of a fatigue spécimen made of carbon-carbon composite This application requires physical contact being maintained between the part and the ultrasound probe via a coupling medium such as water when moving the probe over the surface of the product. Some flagship applications, which can be used in the workshop, are now free of any such constraint. Benjamin Campagne (EADS IW) presented an application whereby the ultrasound is generated and detected by laser. A pulsed laser creates a mechanical shock on the surface of the product while an interferometric sensor decodes the Doppler effect produced by the ultrasound reflected from the surface of the product on the receptor laser beam (Fig. 9). Such a system, called Luis 72 L, has been developed by Aérospatiale-Dassault and is now installed at the Technocampus 2 platform dedicated to composites research. It should be noted that other test installations are now in use industrially, such as those developed by Lockheed Martin for inspecting the F22 American fighter jets. Mr. Campagne pointed out that the interest of this technology lies in

Fig. 6: Abnormal resin distribution during the manufacturing process (Cscan presentation)

Fig. 9: C-scan mapping of a radome by laser ultrasound (source EADS IW)

60

jec composites magazine / No64 April 2011

Fig . 7: Mat delamination (Bscan presentation)

Fig. 8: Delamination of a fatigue specimen made of carbon-carbon composite, 10 mm thick

Detecting delamination on a carbon composite specimen Experimental conditions
- Tested specimen: carbon-carbon composite / 10 mm thick - Defect: delamination - Cscan presentation

the possibility of testing complex shapes without having to adjust the probe to the contours of the product. An example test application in C-scan planar projection was given for a composite radome currently being developed (Fig. 9). For his part, D. Osmont, of ONERA, presented an original application for detecting impact damage via flexural guided waves, on a foam core sandwich, with ultrasonic excitation via a piezoelectric disk bonded to the structure, and detection of the faults created by impact by means of a laser vibrometer. The acoustic testing methods for composites may also be applied to characterisation, i.e.: determining the mechanical characteristics of the materials. The LMP Innovation Laboratory in Bordeaux is indeed carrying out studies on the use of ultrasound for detecting faults and for characterisation (determining the elastic constants of composites). Leading applications were presented by Professor Castaing, such as the use of air-coupling sensors to detect defects caused by mechanical impact, and artificial delamination testing via ultrasonic guided waves (Fig. 10). The LMP lab is currently carrying out thesis work in collaboration with the Cetim foundation on the simulation of guided waves in composites. The lab has also demonstrated the value of guided waves for testing the adhesion of an aircraft repair patch (Fig. 11). Finally, LMP has developed a characterisation activity using guided waves in composites for the following areas: - Measurement of elastic constants in carbon-epoxy via ultrasonic guided waves - Measurement of elastic constants at 300°C - Picosecond acoustic measurement of the plasticity of a thin layer (2.1 mm)



JEC COMPOSITES MAGAZINE - Issue #64 - April 2011

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #64 - April 2011

Cover
Edito
Point of view: fast expansion
Contents
Agenda of Events
COMPANY & BUSINESS
In Brief
Reinforcement - Red Composites: a real expertise in carbon fibre
Housing - Housetec: a young company with a background of 40 years’ experience
Asia - Hua Dong Fibreglass, an SME that exports worldwide
APPLICATIONS
Construction - Creative eye-catching design for a new Sheraton hotel
Marine - Multiplast builds the Groupama V070
Awards - ICERP-JEC Innovation Awards Programme 2011: eight companies rewarded
MARKET
Human capital - Latest appointments
Sports and Leisure - Rossignol Group: innovation and performance in winter skis applications
FEATURE WIND ENERGY
Reinforcement - WebCore Technologies: great ambitions in the wind industry
New rovings for wind turbine blade applications
Prepreg spar caps: a solution for today
Software - Industrial software for manufacturing large components such as wind blades
Leveraging an end-to-end solution for composite wind turbine blades
Laser placement - Manufacturing rotor blades with highest precision while reducing costs
Automation - A fully-automated manufacturing process for wind blades
Maintenance - An innovative, certified blade repair system
RESEARCH & DEVELOPMENT
Testing - Using nano-scratch testing to detec composite failure
Mould - Processing technology for the rapid production of advanced composites
TECHNOLOGY & INNOVATIONS
Robot - Robotic fibre placement machine helps reduce energy consumption
Process - A new industrialized construction process for transport infrastructures
Fibre placement - Tape laying and fibre palcement: complementary solutions
NDT - What’s new in non-destructive testing labs?
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Cover
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 2
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Edito
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Point of view: fast expansion
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 5
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Contents
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 7
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - In Brief
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Reinforcement - Red Composites: a real expertise in carbon fibre
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Housing - Housetec: a young company with a background of 40 years’ experience
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Asia - Hua Dong Fibreglass, an SME that exports worldwide
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 13
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Construction - Creative eye-catching design for a new Sheraton hotel
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 15
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Marine - Multiplast builds the Groupama V070
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 17
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Awards - ICERP-JEC Innovation Awards Programme 2011: eight companies rewarded
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 19
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 20
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 21
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 22
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Human capital - Latest appointments
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Sports and Leisure - Rossignol Group: innovation and performance in winter skis applications
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 25
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 26
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 27
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Reinforcement - WebCore Technologies: great ambitions in the wind industry
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 29
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - New rovings for wind turbine blade applications
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Prepreg spar caps: a solution for today
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Software - Industrial software for manufacturing large components such as wind blades
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 33
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Leveraging an end-to-end solution for composite wind turbine blades
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 35
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 36
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 37
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Laser placement - Manufacturing rotor blades with highest precision while reducing costs
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 39
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Automation - A fully-automated manufacturing process for wind blades
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 41
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Maintenance - An innovative, certified blade repair system
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 43
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 44
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Testing - Using nano-scratch testing to detec composite failure
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 46
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 47
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 48
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Mould - Processing technology for the rapid production of advanced composites
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 50
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 51
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 52
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Robot - Robotic fibre placement machine helps reduce energy consumption
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Process - A new industrialized construction process for transport infrastructures
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 55
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - Fibre placement - Tape laying and fibre palcement: complementary solutions
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 57
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - NDT - What’s new in non-destructive testing labs?
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 59
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 60
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 61
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 62
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 63
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 64
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 65
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 66
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 67
JEC COMPOSITES MAGAZINE - Issue #64 - April 2011 - 68
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