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Modellering av kolfiberstrukturer till konstruktionssystem för produktionsutrustning

Werius, Patrik (2008) MMK820
Product Development
Abstract
This master’s thesis has been written by Patrik Werius at the Department of Machine Design at the Faculty of Engineering, LTH, at Lund University. It has been part of a research project which is dealing with the development of a construction system. This construction system is a new concept for assembling the cabin of a Volvo truck. The focus of this master’s thesis is on the connection between the automation robot and the metallic plate sides of the cabin, the so called fixture, and the initial goal of the master’s thesis was to produce a weight optimized prototype of this fixture. The reasons for changing the goal was partly because the want of adequate back ground information but mostly due to the lack of a generic analysis model for... (More)
This master’s thesis has been written by Patrik Werius at the Department of Machine Design at the Faculty of Engineering, LTH, at Lund University. It has been part of a research project which is dealing with the development of a construction system. This construction system is a new concept for assembling the cabin of a Volvo truck. The focus of this master’s thesis is on the connection between the automation robot and the metallic plate sides of the cabin, the so called fixture, and the initial goal of the master’s thesis was to produce a weight optimized prototype of this fixture. The reasons for changing the goal was partly because the want of adequate back ground information but mostly due to the lack of a generic analysis model for carbon fibre reinforced plastic. The goal was changed too delivering such an analysis model and to perform a pilot study for modelling of carbon fibre structures.
To be able to accommodate the criteria of maximum allowable deformation of the fixture when lifting a cabin side a carbon fibre reinforced plastic is used. This has very high strength to weight ratio but it is also complicated to analyze with computer based construction analysis. For this an analysis model has been generated and described within this master’s thesis. It was also compared to tensile tests of test rods of fibre reinforced plastics. Data from the analysis model and the tensile tests were compared and found to be correspondent. A well-founded substitution to aluminium enabled the development process to go forth parallel to the generation of the analysis model for the fibre reinforced plastic. The results from the development process were compared with an already existing product. This product was assumed to fulfil the criteria of maximum deformation and when analyzed with aluminium as material appropriate data for comparison was established. A suggestion of an alternative shape of the fixture compared to the already existing product was delivered with a weight reduction of 7.3 %.
Analysis on the alternative shape with fibre reinforced plastic was not performed. Therefore there was not established an estimation of how much the weight could be reduced due to optimization of the fibre alignment. To get an idea of how significant the optimization of the fibre alignment is to weight optimization a simple test was performed. This test compared the linear strain of different test rods subjected to the same tensile strength test. The difference between the rods was the fibre alignment. The result pointed to that an optimization of the fibre alignment can lead to a reduction of the linear strain with approximately 50 %. The aim of this master’s thesis was changed into becoming a pilot study for development of weight optimized prototypes and delivering an analysis model for fibre reinforced plastics. The recommendation for future studies is to concentrate on the optimization of fibre alignment. (Less)
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author
Werius, Patrik
supervisor
organization
course
MMK820
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Product development, bending resistance, weight optimization, ANSYS, carbon fibre reinforced plastic
language
Swedish
id
1544527
date added to LUP
2010-02-11 15:29:10
date last changed
2010-02-11 15:29:10
@misc{1544527,
  abstract     = {This master’s thesis has been written by Patrik Werius at the Department of Machine Design at the Faculty of Engineering, LTH, at Lund University. It has been part of a research project which is dealing with the development of a construction system. This construction system is a new concept for assembling the cabin of a Volvo truck. The focus of this master’s thesis is on the connection between the automation robot and the metallic plate sides of the cabin, the so called fixture, and the initial goal of the master’s thesis was to produce a weight optimized prototype of this fixture. The reasons for changing the goal was partly because the want of adequate back ground information but mostly due to the lack of a generic analysis model for carbon fibre reinforced plastic. The goal was changed too delivering such an analysis model and to perform a pilot study for modelling of carbon fibre structures.
To be able to accommodate the criteria of maximum allowable deformation of the fixture when lifting a cabin side a carbon fibre reinforced plastic is used. This has very high strength to weight ratio but it is also complicated to analyze with computer based construction analysis. For this an analysis model has been generated and described within this master’s thesis. It was also compared to tensile tests of test rods of fibre reinforced plastics. Data from the analysis model and the tensile tests were compared and found to be correspondent. A well-founded substitution to aluminium enabled the development process to go forth parallel to the generation of the analysis model for the fibre reinforced plastic. The results from the development process were compared with an already existing product. This product was assumed to fulfil the criteria of maximum deformation and when analyzed with aluminium as material appropriate data for comparison was established. A suggestion of an alternative shape of the fixture compared to the already existing product was delivered with a weight reduction of 7.3 %.
Analysis on the alternative shape with fibre reinforced plastic was not performed. Therefore there was not established an estimation of how much the weight could be reduced due to optimization of the fibre alignment. To get an idea of how significant the optimization of the fibre alignment is to weight optimization a simple test was performed. This test compared the linear strain of different test rods subjected to the same tensile strength test. The difference between the rods was the fibre alignment. The result pointed to that an optimization of the fibre alignment can lead to a reduction of the linear strain with approximately 50 %. The aim of this master’s thesis was changed into becoming a pilot study for development of weight optimized prototypes and delivering an analysis model for fibre reinforced plastics. The recommendation for future studies is to concentrate on the optimization of fibre alignment.},
  author       = {Werius, Patrik},
  keyword      = {Product development,bending resistance,weight optimization,ANSYS,carbon fibre reinforced plastic},
  language     = {swe},
  note         = {Student Paper},
  title        = {Modellering av kolfiberstrukturer till konstruktionssystem för produktionsutrustning},
  year         = {2008},
}