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Workshop "Integrated monitoring of structures" (18/12/13)

18th December 2013 - Besançon (France)

Workshop "Integrated monitoring of structures:
Damage assessment of composite materials by acoustic emission"


shm phm 

  The Labex ACTION organises on Wednesday 18th December, 2013 a workshop entitled "Integrated monitoring of structures: Damage assessment of composite materials by acoustic emission".

  The workshop will feature :
  - several public plenary sessions given by key internationally acknowledged experts (Nathalie GODIN, Markus SAUSE and Keith WORDEN) and
  - a private discussion panel about the technology roadmap which has been implementing by the Labex ACTION and FEMTO-ST (Manuel Collet, Morvan Ouisse and Yann Le Gorrec) within the 
    "Adaptive metacomposites"  demonstrator project.



>Register now (on invitation only)!

8.30Reception & welcome
9.00
Public plenary sessions
 
Welcome
Demonstrator « Adaptive metacomposites »
Manuel COLLET, Ecole Centrale de Lyon (France)

Research activities in smart materials and structures represent a significant potential for technological innovation in mechanics and electronics. The necessity of controlling vibroacoustic behavior of industrial systems motivates a broad research effort for introducing new technologies to control noise, vibrations and integrate Structural Health Monitoring capabilities. New processes are now available which allow active transducers and their driving electronics to be directly integrated into otherwise passive structures. This new approach could allow fine control of the material physical behavior for implementing new functional properties that do not exist in nature. In this sense, we can speak of "integrated distributed adaptive metacomposites” that merges with the notion of programmable material or material by design. Through different examples dealing with active acoustical impedance, control of elastodynamical interface, or  design and optimization of dedicated smart sensor for SHM, this seminar presents the used theoretical tools for designing specific applications of this new technology. Experimental results are also used to validate the proposed methodologies.

09.30
The State of the Art in Structural Health Monitoring: Progress and Pitfalls
Keith WORDEN, Department of Mechanical Engineering, University of Sheffield, UK

Structural Health Monitoring (SHM) can be regarded now as a mature research subject; the main problems have been formulated with some precision and progress has been made in solving a number of them. In fact, one can argue that the subject has progressed to the point where a number of ‘fundamental truths’ or ‘axioms’ have been established. However, while a great deal of progress has been made in research terms, the uptake of the technology by industry has been rather disappointing. This is partly because it has proved difficult to establish a compelling business case for implementing SHM technology. The current paper will provide a summary of recent research progress in the field and attempt to identify which challenges remain as a barrier to widespread adoption of SHM technology within industry.

10.15

Coffee break

10.45
Identification of damage modes and lifetime prediction with acoustic emission monitoring on ceramic matrix composites during static fatigue tests at high temperature under air
Nathalie GODIN, INSA Lyon, Laboratoire MATEIS, Villeurbanne, France

Ceramic matrix composites (CMC) are interesting structural materials for high temperature applications, owing to their good mechanical properties at elevated temperatures. Cf/SiC composites have been developed for aeronautic and aerospace applications. Acoustic emission is a transient wave resulting from the sudden release of stored energy during damage. Detection and analysis of acoustic emission (AE) are powerful means for identification of damage phenomena and monitoring of their evolution. Damage of fiber reinforced ceramic matrix composites involves several phenomena at various length scales including matrix cracking, fiber debonding, fiber failures [...]

11.30

Lunch break

13.00
Application of pattern recognition techniques and finite element
modeling to identify acoustic emission sources mechanisms
Markus SAUSE, University of Augsburg (Germany)

Fiber reinforced composites are superior materials in terms of their strength-to-weight and stiffness-to-weight ratio. Still the full potential of these materials is not utilized due to the lack of clearly predictable load limits. In order to investigate failure of fiber reinforced composites acoustic emission analysis was found to be a suitable tool. Due to the sensitivity of this method all sorts of microscopic failure mechanisms can be detected during loading of the structure. Because the severity of the various failure mechanisms for the structural integrity can differ drastically, it is a requirement to distinguish between different types of failure that occur within the structure under loading [...]

13.45
Focus on some activities carried out within the Laboratory of Excellence ACTION
Introduction by Lamine BOUBAKAR, FEMTO-ST (France)

The development of innovative composite solutions in high-technology industries today is still confronted by significant obstacles which include the prediction of the lifetime and the resistance to initial and induced damage under complex loadings. Alongside the work carried out over the past several years at the FEMTO-ST Institute on the characterization of static and dynamic behaviors, the development of predictive models with uncertain data and the building of decision-making tools to support the design and validation of complex systems, a new research field was recently initiated to investigate the potential of an integrated health assessment in the material in order to predict its fatigue performances. In a first step, which is the subject of this workshop, two research departments of FEMTO-ST Institute have teamed up to develop tools for processing and analyzing informations from acoustic emission measurements within the context of an unconstrained experimental environment. Initiated in the case of static loadings, this work (which is currently ongoing in the case of fatigue loadings) aims to objectively distinguish and predict failure modes at the different scales of the material, in particular by taking into account the influence of loading conditions.

 
Assessment of the temporal sequence of damage mechanisms in composite materials based on acoustic emissions
Emmanuel RAMASSO, FEMTO-ST
 
On acoustic emission to assess the complex behaviour of composite
material under multi-axial fatigue loading
Vincent PLACET, FEMTO-ST
 
Facing the challenge of clustering acoustic emission data from fatigue tests of composite materials
Dinh Dong DOAN, FEMTO-ST
14.45

End of the public session and coffee break

15.15
Private working group
16.30

End

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contact

All queries regarding the program, organization and registration, should be sent to:
claudia.laou-huen@femto-st.fr
Tel.: +33 (0)3 81 85 39 25

Venue & accommodations

The workshop will be held on  Wednesday December 18, 2013 at:
ENSMM - Ecole Nationale Supérieure de Mécanique et des Microtechniques
"Jules Haag" Lecture Hall

26 Rue Epitaphe
25000 Besançon
, France
03 81 40 27 00
· ens2m.fr

We recommand the following hotels:

Hôtel All Suites Besançon (less than 10 min on foot)
17 Avenue des Montboucons

25000 Besançon

03 81 85 10 60

Logis Hôtel Florel (in front of the train station "Gare Viotte", in downtown)
6 Rue de la Viotte
25000 Besançon
03 81 80 41 08
Take the bus line #8: "Foch Gare station" until "ENSMM" bus stop (10 min)

7 bis Avenue du Maréchal Foch
25000 Besançon
03 81 80 30 41
Take the bus line #8: "Foch Gare station" until "ENSMM" bus stop (10 min)




Agrandir le plan

Registration is free but compulsory and on invitation only. Thanks in advance.