Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.

• A method for measuring wetting and swelling of bentonite using X-ray imaging 

  Harjupatana, Tero; Miettinen, Arttu; Kataja, Markku (Elsevier, 2022)

  A non-invasive method based on X-ray imaging for measuring deformation and water transport in wetting and swelling bentonite samples is introduced. Sequential X-ray images taken of the samples were used to calculate the ...

• Hygro-elasto-plastic model for planar orthotropic material 

  Erkkilä, Anna-Leena; Leppänen, Teemu; Hämäläinen, Jari; Tuovinen, Tero (Pergamon, 2015)

  An in-plane elasto-plastic material model and a hygroexpansivity-shrinkage model for paper and board are introduced in this paper. The input parameters for both models are fiber orientation anisotropy and dry solids ...

• A plasticity model for predicting the rheological behavior of paperboard 

  Leppänen, Teemu; Erkkilä, Anna-Leena; Kouko, Jarmo; Laine, Valtteri; Sorvari, Joonas (Pergamon, 2017)

  The sorption of water into the paperboard exposes a container to reversible and irreversible deformations under relative humidity variations. In this study, an elasto-plastic material model is used to demonstrate how ...

• The curl and fluting of paper : The effect of elasto-plasticity 

  Erkkilä, Anna-Leena; Leppänen, Teemu; Tuovinen, Tero (National Technical University of Athens; ECCOMAS, 2016)

  An in-plane elasto-plastic material model and a hygroexpansivity model were ap­plied for paper. The input parameters for both models are fiber orientation and dry solids content. A finite element model was constructed ...

• Kastuvan bentoniitin muodonmuutosten ja vesipitoisuuden aikakehityksen mittaaminen röntgenkuvauksen avulla 

  Tanttu, Joni (2020)

  Tämän tutkielman tavoitteena oli jatkokehittää kokeellista menetelmää, jossa kastumisen seurauksena tyhjään tilaan laajenevan bentoniitti nimisen savimateriaalin homogenisaatiota seurataan röntgenkuvauksen avulla. Menetelmällä ...