Skip to main content

LUP Student Papers

LUND UNIVERSITY LIBRARIES

Simulation of ultrasonic testing on ESS Target Shaft

Henriksson, Björn and Gunnarsson, Johan (2013) In Degree project FME820 20131
Mechanics
Abstract (Swedish)
The target shaft in the Target Station of the ESS facility rotates and supports the target wheel and serves as an inflow and outflow for the coolant. Different kinds of stresses that the target shaft is exposed to can create defects or ruptures. Therefore the target shaft has to be monitored so material damage can be avoided. The objective of this master thesis was to investigate the possibility for the use of ultrasonic waves to detect the occurrence and monitor
the growth of defects in the target shaft.

The procedure of modelling ultrasonic waves was explored. A literature study was carried out which resulted in a simulation that was confirmed by an experiment. Then this model for the ultrasonic waves was used to perform simulations... (More)
The target shaft in the Target Station of the ESS facility rotates and supports the target wheel and serves as an inflow and outflow for the coolant. Different kinds of stresses that the target shaft is exposed to can create defects or ruptures. Therefore the target shaft has to be monitored so material damage can be avoided. The objective of this master thesis was to investigate the possibility for the use of ultrasonic waves to detect the occurrence and monitor
the growth of defects in the target shaft.

The procedure of modelling ultrasonic waves was explored. A literature study was carried out which resulted in a simulation that was confirmed by an experiment. Then this model for the ultrasonic waves was used to perform simulations on the target shaft. A number of defects were introduced to the shaft, one by one, to see which were detectable by the ultrasonic waves.

The target shaft is made up of two concentric tubes of different radii that are welded together with a connection piece. Due to the geometry of the target shaft, the detectability
of the defects varies. On one tube it was possible to detect quite small defects but on the other tube even larger defects were hard to detect. This discrepancy in the result makes it
necessary to further investigate whether this method is good or not for monitoring the health of the target shaft. Also, how the results from the simulations translate to real life ultrasonic
testing needs to be considered. To fully verify that this method is appropriate it is necessary to make a mock-up to do experiments on. For future work it would be interesting to investigate if a change in the frequency of the ultrasonic waves or any kind of signal processing would increase the detectability of the defects. (Less)
Please use this url to cite or link to this publication:
author
Henriksson, Björn and Gunnarsson, Johan
supervisor
organization
course
FME820 20131
year
type
H2 - Master's Degree (Two Years)
subject
publication/series
Degree project
report number
ISRN LUTFD2/TFME – 13/5026 – SE(1-67)
ISSN
ISRN
language
English
id
4004391
date added to LUP
2013-08-30 08:11:47
date last changed
2013-08-30 08:11:47
@misc{4004391,
  abstract     = {The target shaft in the Target Station of the ESS facility rotates and supports the target wheel and serves as an inflow and outflow for the coolant. Different kinds of stresses that the target shaft is exposed to can create defects or ruptures. Therefore the target shaft has to be monitored so material damage can be avoided. The objective of this master thesis was to investigate the possibility for the use of ultrasonic waves to detect the occurrence and monitor
the growth of defects in the target shaft.

The procedure of modelling ultrasonic waves was explored. A literature study was carried out which resulted in a simulation that was confirmed by an experiment. Then this model for the ultrasonic waves was used to perform simulations on the target shaft. A number of defects were introduced to the shaft, one by one, to see which were detectable by the ultrasonic waves.

The target shaft is made up of two concentric tubes of different radii that are welded together with a connection piece. Due to the geometry of the target shaft, the detectability
of the defects varies. On one tube it was possible to detect quite small defects but on the other tube even larger defects were hard to detect. This discrepancy in the result makes it
necessary to further investigate whether this method is good or not for monitoring the health of the target shaft. Also, how the results from the simulations translate to real life ultrasonic
testing needs to be considered. To fully verify that this method is appropriate it is necessary to make a mock-up to do experiments on. For future work it would be interesting to investigate if a change in the frequency of the ultrasonic waves or any kind of signal processing would increase the detectability of the defects.},
  author       = {Henriksson, Björn and Gunnarsson, Johan},
  issn         = {ISRN},
  language     = {eng},
  note         = {Student Paper},
  series       = {Degree project},
  title        = {Simulation of ultrasonic testing on ESS Target Shaft},
  year         = {2013},
}