Material characterization and finite element analysis of a pressboard under press forming |
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| Authors: | A. Ghaderi M. Golzar |
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| Affiliation: | 1. ENEA FSN, c.r.e.Frascati, via E. Fermi, 45 Frascati, Roma, Italy;2. ENEA FSN FUSTEC TES, c.r.e.Frascati, via E. Fermi, 45 Frascati, Roma, Italy;1. School of Marine Science and Technology, Northwestern Polytechnical University, #127 Youyixilu, Xi''an, 710072, China;2. Research & Development Institute of Northwestern Polytechnical University in Shenzhen, #45, South Road Nine, Nanshan District, Shenzhen, 518057, China;1. Division of Solid Mechanics, Lund University, SE-22100 Lund, Sweden;2. Institute of Mechanics, TU Dortmund, D-44227 Dortmund, Germany;3. Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Materials Mechanics, D-21502 Geesthacht, Germany |
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| Abstract: | Pressboard is a wood-based material consisting of lignin, hemicellulose and high percentage of cellulose. It is used as primary sheet in the manufacturing process of cellulose ring. The pressboard used in this study is a viscoelastic material with mechanical properties depending on time, temperature and moisture content. Using finite element method and based on nonlinear viscoelastic model, the pressboard material behavior was simulated using WLF equation and the data were obtained from material tests. The simulation results conformed to the related experiments, indicating that the approach can accurately predict spring back, stress relaxation and strain recovery within a press forming process. |
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