The mechanical and geometrical properties of fibrous structures
2023:62 | 2024:118 | 2025:3
This thesis deals with both random and regular (woven) fibre networks. An effective medium theory for the tensile stiffness of two-dimensional random fibre networks is presented. The theory is extended to three-dimensional networks with some but not too strong restrictions. This generalisation involves the computationally determined fraction of bonded crossings in the two-dimensional projection of the three-dimensional network. The two-dimensional and three-dimensional versions of the theory are both succesfully tested against numerical simulations. The porosity of the three-dimensional random fibre networks is found to be given by a numerically determined scaling function, which upon rescaling is shown to be similar to the fraction of bonded crossings described above. This function thus seems to determine the entire structure and mechanical behaviour of randomly deposited fibre mats. A numerical model for the mechanical equilibration of woven fibre networks is also presented. Structures generated by this model are tested against industrially manufactured fabrics. This comparison shows that the model gives fairly realistic results, which guarantees its usefulness also in industrial applications.
...
ISBN
978-951-39-9493-8ISSN Hae Julkaisufoorumista
0075-465XJulkaisuun sisältyy osajulkaisuja
- Artikkeli I: Mäkinen, J., Timonen, J., Åström, J. A., & Alava, M. J. (2000). Elasticity of Poissonian fiber networks. Physical Review E, 61, 5550. DOI: 10.1103/PhysRevE.61.5550
- Artikkeli 1A: Mäkinen, J., Timonen, J., Åström, J. A., & Alava, M. J. (2000). Erratum: Elasticity of Poissonian fiber networks. Physical Review E, 62, 5862. DOI: 10.1103/PhysRevE.62.5862
- Artikkeli II: Åström, J. A., Mäkinen, J. P., Hirvonen, H., and Timonen, J. (2000). Stiffness of compressed fiber mats. Journal of Applied Physics, 88, 5056. DOI: 10.1063/1.1315622
- Artikkeli III: Åström, J. A., Latva-Kokko, M., Kähkönen, S., Mäkinen, J. P. & Timonen, J. (2003). The role of connectivity in the properties of sedimented materials. Granular Matter, 5, 99–103. DOI: 10.1007/s10035-003-0131-0
- Artikkeli IV: Åström, J. A., Mäkinen, J. P. and Timonen, J. (2001). Modeling multilayer woven fabrics. Applied Physics Letters, 79, 180. DOI: 10.1063/1.1385350
- Artikkeli V: Mäkinen, J. P., Åström, J. A. and Timonen, J. (2000). A Relaxation Model for Multi-Layered Woven Fabrics. P roceedings of ECCOMAS 2000.
Metadata
Näytä kaikki kuvailutiedotKokoelmat
- Väitöskirjat [3619]
Lisenssi
Samankaltainen aineisto
Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.
-
Crystal structure and electronic structure calculations of a novel organic triphosphate complex : excellent electrochemical properties with ultra-efficient lithium storage capacity
Makhlouf, Jawher; El Bakri, Youness; Bian, Wensheng; Ahsin, Atazaz; Al-Salahi, Rashad; Valkonen, Arto; Smirani, Wajda (Royal Society of Chemistry, 2024)A new organic–inorganic hybrid molecule, cyclohexyl ammonium dihydride triphosphate, was synthesized at room temperature with slow evaporation, yielding a new triphosphate with the formula HO10P3·(C6H14N)4·2(H2O) using a ... -
Comparison of mechanical properties and composition of magnetron sputter and plasma enhanced atomic layer deposition aluminum nitride films
Sippola, Perttu; Perros, Alexander Pyymaki; Ylivaara, Oili M. E.; Ronkainen, Helena; Julin, Jaakko; Liu, Xuwen; Sajavaara, Timo; Etula, Jarkko; Lipsanen, Harri; Puurunen, Riikka L. (AIP Publishing LLC, 2018)A comparative study of mechanical properties and elemental and structural composition was made for aluminum nitride thin films deposited with reactive magnetron sputtering and plasma enhanced atomic layer deposition (PEALD). ... -
Achilles tendon viscoelastic properties and mechanical responses to a single bout of exercise
Peltonen, Jussi (University of Jyväskylä, 2014) -
Influence of B content on microstructure, phase composition and mechanical properties of CVD Ti(B,N) coatings
Tkadletz, Michael; Schalk, Nina; Lechner, Alexandra; Hatzenbichler, Lukas; Holec, David; Hofer, Christina; Deluca, Marco; Sartory, Bernhard; Lyapin, Andrey; Julin, Jaakko; Czettl, Christoph (Elsevier, 2022)Within this work the effect of the B content on the microstructure, phase composition and mechanical properties of CVD Ti(B,N) coatings is investigated. Ti(B,N) coatings with B contents from 0 (fcc-TiN) to ∼5, ∼15, ∼30, ... -
Reduced Neck Muscle Strength and Altered Muscle Mechanical Properties in Cervical Dystonia Following Botulinum Neurotoxin Injections : A Prospective Study
Mustalampi, Sirpa; Ylinen, Jari; Korniloff, Katariina; Weir, Adam; Häkkinen, Arja (Korean Movement Disorder Society, 2016)ObjectiveaaTo evaluate changes in the strength and mechanical properties of neck muscles and disability in patients with cervical dystonia (CD) during a 12-week period following botulinum neurotoxin (BoNT) injections. ...
Ellei toisin mainittu, julkisesti saatavilla olevia JYX-metatietoja (poislukien tiivistelmät) saa vapaasti uudelleenkäyttää CC0-lisenssillä.