Macroscale crease models calibrated to synthetic crease experiments
(2024) In TFHF-5000 FHLM01 20232Solid Mechanics
Department of Construction Sciences
- Abstract
- This master's thesis presents a method for approximating the folding behavior of paperboard using macroscopic data. Synthetic data is generated by conducting finite element analysis on paperboard modeled using continuum elements and an advanced constitutive law formulated within a thermodynamic framework. The paperboard model undergoes creasing followed by various folding sequences, enabling the extraction of curves that relate bending resistance to a corresponding fold angle. Additionally, a compression test is conducted, and its results are compared with experimental data found in literature. Subsequently an investigation of capturing the synthetic folding behavior is performed, which involves approximating paperboard with beam elements... (More)
- This master's thesis presents a method for approximating the folding behavior of paperboard using macroscopic data. Synthetic data is generated by conducting finite element analysis on paperboard modeled using continuum elements and an advanced constitutive law formulated within a thermodynamic framework. The paperboard model undergoes creasing followed by various folding sequences, enabling the extraction of curves that relate bending resistance to a corresponding fold angle. Additionally, a compression test is conducted, and its results are compared with experimental data found in literature. Subsequently an investigation of capturing the synthetic folding behavior is performed, which involves approximating paperboard with beam elements using a fully linear-elastic material model. A single beam element is used to represent the crease, modified to include plasticity modeling, aiming to replicate behavior seen in synthetic data. A parametric study is conducted by introducing parameters concerning the crease beam's geometric attributes, as well as the linear-elastic and plastic material properties of the crease beam. It is found that the initial sequences of folding are captured relatively well, while for folds of increased complexity the ability of the beam to mimic the macroscopic synthetic data deteriorates. The model's limitations are discussed, particularly regarding the possible need to differentiate the crease beam's behavior under monotonic axial loading from pure bending modes, particularly given the method of plasticity modeling employed. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9165103
- author
- Tómasson, Kristján LU
- supervisor
- organization
- course
- FHLM01 20232
- year
- 2024
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- Paperboard creases, Super element, Crease synthetic data
- publication/series
- TFHF-5000
- report number
- TFHF-5262
- language
- English
- id
- 9165103
- date added to LUP
- 2024-06-25 14:51:19
- date last changed
- 2024-06-25 14:51:19
@misc{9165103, abstract = {{This master's thesis presents a method for approximating the folding behavior of paperboard using macroscopic data. Synthetic data is generated by conducting finite element analysis on paperboard modeled using continuum elements and an advanced constitutive law formulated within a thermodynamic framework. The paperboard model undergoes creasing followed by various folding sequences, enabling the extraction of curves that relate bending resistance to a corresponding fold angle. Additionally, a compression test is conducted, and its results are compared with experimental data found in literature. Subsequently an investigation of capturing the synthetic folding behavior is performed, which involves approximating paperboard with beam elements using a fully linear-elastic material model. A single beam element is used to represent the crease, modified to include plasticity modeling, aiming to replicate behavior seen in synthetic data. A parametric study is conducted by introducing parameters concerning the crease beam's geometric attributes, as well as the linear-elastic and plastic material properties of the crease beam. It is found that the initial sequences of folding are captured relatively well, while for folds of increased complexity the ability of the beam to mimic the macroscopic synthetic data deteriorates. The model's limitations are discussed, particularly regarding the possible need to differentiate the crease beam's behavior under monotonic axial loading from pure bending modes, particularly given the method of plasticity modeling employed.}}, author = {{Tómasson, Kristján}}, language = {{eng}}, note = {{Student Paper}}, series = {{TFHF-5000}}, title = {{Macroscale crease models calibrated to synthetic crease experiments}}, year = {{2024}}, }