Inlämning av Examensarbete / Submission of Thesis

Kristofer Larsson; Andreas Silverbris BTH-IMA-EX--2003/D-09--S, pp. 130. ING/School of Engineering, 2003.

The work

Författare / Author: Kristofer Larsson, Andreas Silverbris
Titel / Title: Crack detection using Non- Linear Wave Modulation Spectroscopy
Abstrakt Abstract:

This report comprises an investigation of the non-linear ultrasonic crack detection method; Non-Linear Wave Modulation Spectroscopy, NWMS. Cracks in test objects were according to the NWMS method detected through their non-linearity. The non-linearity was observed as sum and
difference frequencies for an ultrasonic signal interacting with a low frequency signal in the test objects. A test setup and test procedure was developed and an Excel program for a rational suggested quantification of non-linearity was written. The method was applied and evaluated on cracked and non-cracked rotor blades for jet engines.

Ämnesord / Subject: Maskinteknik - Mechanical Engineering\Structural Dynamics
Maskinteknik - Mechanical Engineering\General
Nyckelord / Keywords: NWMS, Rotor blade, Micro crack, Excel, Theoretical derivation, Experimental implification

Publication info

Dokument id / Document id:
Program:/ Programme Masters Programme in Mechanical Engineering 120 ECTS
Registreringsdatum / Date of registration: 06/04/2010
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)


Handledare / Supervisor: Claes Hedberg
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: ING/School of Engineering

+46 455 38 50 00

Files & Access

Bifogad uppsats fil(er) / Files attached: kristoferandreas2003.pdf (1794 kB, öppnas i nytt fönster)