|NDT.net||October 2005, Vol. 10 No.10|
CIVAnde is dedicated to the simulation of Non Destructive Evaluation.
Fabrice FOUCHER, Sébastien CADEAU-BELLIARD - Cedrat.
Flux Magazine N°49 - September 2005
CIVAnde is a unique simulation software for non destructive processes and devices. It includes the simulation of Ultrasonic and Eddy Currents techniques and is based on an NDT dedicated interface: prededfined geometries and transducers, a complete material database and performing signal processing tools are integrated in the software.
We will describe briefly the ultrasonic simulation steps.
Ultrasonic simulation steps
1-Define the component geometryThe geometry may be canonical (planar, cylindrical, cone, nozzle or elbow)or can be imported from a CAD file (2D or 3D). It can be homogeneous, multilayered or heterogeneous.
2-Define the component materialThe material may be user defined or exerted from a database available in CIVAnde.It can be isotropic and anisotropic.
3-Define the transducer typeVarious types of transducer may be chosen: contact, immersion, dual Tr.
4-Define the element shapeThe element may be single (circular, rectangular or elliptic) or defined as a phased array (linear, matrix, circular, elliptic pattern). In that case, the delay laws are computed in CIVAnde to fit the desired focusing mode.
5-Define the focusing modeThe focusing surface may be flat (divergent probes) or have various shapes: cylindrical, spherical, bifocal, trifocal, fermat.
6-Define the impulse signalAll characteristics of the signal are available: centre frequency, band- width, phase difference, magnitude, noise addition as well and sampling parameters.
7-Define the control configurationThe position of the probe as well as the scanning are defined there.
8-Define the Beam or echo computationBeam computation allows quantitatively predict and display the radiated field in the component which is very useful to design the sensor and the inspection method. The echo computation accounts for the interaction with flaws in the components (flaws may be rectangular, spherical, flat bottomed, side drilled hole, material inclusion …). The echo computation accounts for various phenomena such as multiple skips in the geometry, various echoes (direct, indirect, corner), attenuation,…
All those simulation capabilities are completed by outstanding signal and image processing tools to post-process the simulation results and/or measurement quantities: A, B, C, D scans, echodynamics …
CIVAnde 8.0Next version of CIVAnde will be release this autumn. All new features are presented on CIVAnde’s website www-civa.cea.fr
CIVAnde was or will be presented at:
• 32nd Annual Review of Progress in QNDE, Brunswick,(Maine,USA)
• BINDT,Harrogate (UK),September 13-15
• ASNT Fall Conference,Columbus (Ohio,USA), October 17-21
Flux Magazine is a quaterly magazine about CEDRAT's product. This magazine is published by CEDRAT, the Editing manager is Bruno Ribard, Managing director of CEDRAT and CEDRAT TECHNOLOGIES. There are two versions of this magazine, English and French.