Microstructure and crystal plasticity in aluminium foil
(2017) In ISRN LUTFD2/TFHF-17/5217-SE(1-60) FHL820 20171Solid Mechanics
- Abstract
- A beverage package is exerted to different loading conditions during its lifetime. Today, there is limited knowledge on material responses on a micro scale and how these affect the macroscopic behaviour in general. Tetra Pak® produces packaging material consisting of several layers of materials, such as polymers, paperboard and aluminium foil. This master’s thesis focuses on the aluminium foil, more specifically by incorporating the microstructure when modelling the material by utilising a crystal plasticity (CP) framework. The model is based on the single crystal properties of pure aluminium and a homogenisation approach is adopted to generalise the model also to aluminium polycrystals. Two different types of hardening models are... (More)
- A beverage package is exerted to different loading conditions during its lifetime. Today, there is limited knowledge on material responses on a micro scale and how these affect the macroscopic behaviour in general. Tetra Pak® produces packaging material consisting of several layers of materials, such as polymers, paperboard and aluminium foil. This master’s thesis focuses on the aluminium foil, more specifically by incorporating the microstructure when modelling the material by utilising a crystal plasticity (CP) framework. The model is based on the single crystal properties of pure aluminium and a homogenisation approach is adopted to generalise the model also to aluminium polycrystals. Two different types of hardening models are implemented and compared. Material parameters for each model are calibrated in an effort to virtually generate the behaviour of aluminium foil. To verify the model, the virtual responses are compared to experimental data for uni-axial tensile tests by means of the coefficient of determination.
The model has some difficulties with replicating the experimental data for a single crystal. For a polycrystal, however, the model response agrees better with experimental data which is most probably due to a homogenisation effect. It is clearly shown that the texture input is of high importance for the overall material response. It can be concluded that it is imperative to understand the material characteristics inherited from the aluminium foil production process on a micro scale, and that the implementation of a crystal plasticity framework is a powerful approach when modelling aluminium foil in an effort to understand its macroscopic behaviour. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/8912516
- author
- Duse, Oscar LU and Szekely, Robert
- supervisor
- organization
- course
- FHL820 20171
- year
- 2017
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- Aluminium foil, crystal plasticity, microstructure, texture, EBSD
- publication/series
- ISRN LUTFD2/TFHF-17/5217-SE(1-60)
- report number
- TFHF-5217
- other publication id
- ISRN LUTFD2/TFHF-17/5217-SE(1-60)
- language
- English
- id
- 8912516
- date added to LUP
- 2017-06-14 12:07:17
- date last changed
- 2017-06-14 12:07:17
@misc{8912516,
abstract = {{A beverage package is exerted to different loading conditions during its lifetime. Today, there is limited knowledge on material responses on a micro scale and how these affect the macroscopic behaviour in general. Tetra Pak® produces packaging material consisting of several layers of materials, such as polymers, paperboard and aluminium foil. This master’s thesis focuses on the aluminium foil, more specifically by incorporating the microstructure when modelling the material by utilising a crystal plasticity (CP) framework. The model is based on the single crystal properties of pure aluminium and a homogenisation approach is adopted to generalise the model also to aluminium polycrystals. Two different types of hardening models are implemented and compared. Material parameters for each model are calibrated in an effort to virtually generate the behaviour of aluminium foil. To verify the model, the virtual responses are compared to experimental data for uni-axial tensile tests by means of the coefficient of determination.
The model has some difficulties with replicating the experimental data for a single crystal. For a polycrystal, however, the model response agrees better with experimental data which is most probably due to a homogenisation effect. It is clearly shown that the texture input is of high importance for the overall material response. It can be concluded that it is imperative to understand the material characteristics inherited from the aluminium foil production process on a micro scale, and that the implementation of a crystal plasticity framework is a powerful approach when modelling aluminium foil in an effort to understand its macroscopic behaviour.}},
author = {{Duse, Oscar and Szekely, Robert}},
language = {{eng}},
note = {{Student Paper}},
series = {{ISRN LUTFD2/TFHF-17/5217-SE(1-60)}},
title = {{Microstructure and crystal plasticity in aluminium foil}},
year = {{2017}},
}