Modelling the effect of concrete cement composition on its strength and failure behavior

Autor: Timo Saksala, Kari Kolari, Reijo Kouhia

Publikováno v: Saksala, T, Kolari, K & Kouhia, R 2022, ' Modelling the effect of concrete cement composition on its strength and failure behavior ', Rakenteiden Mekaniikka, vol. 55, no. 3, pp. 55-65 . https://doi.org/10.23998/rm.120704
Rakenteiden Mekaniikka

Typical concrete is a mixture of Portland cement, water, and aggregates. While aggregates have a substantial effect on the concrete strength and fracture behavior, the focus of the present study is on the hardened cement paste which can be further di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b6af6d9fb38689d6a0c6a15bb770de2
https://doi.org/10.23998/rm.120704

Committee V.2: Experimental Methods

Autor: Soren Ehlers, Nagi Abdussamie, Kim Branner, ShiXiao Fu, Martijn Hoogeland, Kari Kolari, Paul Lara, Constantine Michailides, Hideaki Murayama, Rizzo, Cesare M., Jung Kwan Seo, Patrick Keading

Publikováno v: Technical University of Denmark Orbit

Committee Mandate Concern for advances in structural model testing and full-scale experimentation and in-service monitoring and their role in the design, construction, inspection and maintenance of ship and offshore structures. This shall include new

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3195057be67e181d817951ce8c81aa91
https://doi.org/10.5957/issc-2022-committee-v-2

Strength of Ice in Brittle Regime—Multiscale Modelling Approach

Autor: Kari Kolari, Reijo Kouhia

Publikováno v: Kolari, K & Reijo, K 2022, Strength of Ice in Brittle Regime—Multiscale Modelling Approach . in A Polojärvi & J Tuhkuri (eds), IUTAM Symposium on Physics and Mechanics of Sea Ice . Springer, IUTAM Bookseries, vol. 39, pp. 9-30, IUTAM Symposium on Physics and Mechanics of Sea Ice, Espoo, Finland, 3/06/19 . https://doi.org/10.1007/978-3-030-80439-8_2
IUTAM Symposium on Physics and Mechanics of Sea Ice ISBN: 9783030804381

A three dimensional constitutive model based on micromechanical behaviour of granular and columnar ice in the brittle regime is proposed. The model exploits the experimentally observed crack initiation mechanism; grain boundary sliding. The growth of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65a189b48e95714c632e95d2d401c2ca
https://doi.org/10.1007/978-3-030-80439-8_2

Anisotropic damage model for concrete and other quasi-brittle materials

Autor: Juha Hartikainen, Kari Kolari, Jani Vilppo, Alexis Fedoroff, Reijo Kouhia, Kim Calonius

Publikováno v: Vilppo, J, Kouhia, R, Hartikainen, J, Kolari, K, Fedoroff, A & Calonius, K 2021, ' Anisotropic damage model for concrete and other quasi-brittle materials ', International Journal of Solids and Structures, vol. 225, 111048 . https://doi.org/10.1016/j.ijsolstr.2021.111048

A thermodynamically consistent formulation to model anisotropic damage for quasi-brittle materials is proposed. The model is based on proper expressions for the specific Gibbs free energy and the complementary form of the dissipation potential. Damag

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06e79f0d7ce352ba8e11e25c9abc43d1
https://trepo.tuni.fi/handle/10024/132641

On the regularisation property of the Kachanov-Rabotnov continuum damage model - a finite element study

Autor: Harm Askes, Juha Hartikainen, Kari Kolari, Reijo Kouhia, Timo Saksala, Jani Vilppo

Publikováno v: Tampere University

In this paper the regularising properties of the Kachanov-Rabotnov type continuum damage constitutive model are studied using a simple one-dimensional dynamic problem. It is found that the width of the localisation zone is independent of the mesh siz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::5de587f5c69b13c38c671eecff6ae1a4
https://trepo.tuni.fi/handle/10024/129664