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Quantitative non-destructive testing: The integration of non-destructive testing and probabilistic fracture mechanics

 
: Kurz, J.H.; Cioclov, D.; Dobmann, G.

:
Postprint urn:nbn:de:0011-n-686728 (152 KByte PDF)
MD5 Fingerprint: 2fc59a03cfca30777a83fe82c3fbedb9
The original publication is available at springerlink.com
Created on: 9.7.2010


Grosse, C.U.:
Advances in construction materials 2007
Berlin: Springer, 2007
ISBN: 3-540-72447-8
ISBN: 978-3-540-72447-6
pp.583-590
Conference on Advances in Construction Materials (ACM) <2007, Stuttgart>
English
Conference Paper, Electronic Publication
Fraunhofer IZFP ()
quantitative non-destructive testing; probabilistic fracture mechanic; Monte Carlo simulation; POD; failure assessment diagram (FAD)

Abstract
Nowadays, the non-destructive evaluation of structural components allows the detection of cracks and other types of flaws with a high resolution. When cracks are involved in mechanical failure events, fracture mechanics provides concepts for lifetime prediction of components when component geometry, material characteristics and load intensity under steady state or impact loading are known. Under fatigue loads additionally material laws have to be observed. Bringing together these disciplines, quantitative non-destructive testing for lifetime prediction is possible.
Due to measurement uncertainties related to crack size geometry, material pa-rameters' inherent scatter and load history are not unambiguously assessable. Therefore, statistical distributions are assumed (e. g. Normal or Weibull) and probabilistic fitness for service assessment (FFS) is performed rather than a de-terministic one.
This concept of combining quantitative non-destructive testing and probabilistic FFS assessment works well for metals. The fracture mechanics analysis under predominantly static loading has at its core the so called Failure Assessment Diagram (FAD). Hereby, an illustrative tool for condition monitoring is supplied which is also accepted in design rules and codes.

: http://publica.fraunhofer.de/documents/N-68672.html