Details
| Original language | English |
|---|---|
| Article number | 105359 |
| Journal | Mechanics of materials |
| Volume | 207 |
| Early online date | 25 Apr 2025 |
| Publication status | E-pub ahead of print - 25 Apr 2025 |
Abstract
Plain concrete exhibits pronounced stress softening and permanent strains in uniaxial cyclic tension. The permanent strains in concrete have been measured since the 1980s by repeated tensile loading–unloading sequences. Nevertheless, accurately modeling the permanent strains, as well as the post-peak response, is still a challenge. To overcome it, we propose a conceptual three-phase modeling of concrete discretized by finite elements, consisting of an elastic aggregate phase, a perfectly plastic Interfacial Transition Zone (ITZ), and an anisotropically damaging mortar phase. Damage in mortar is assumed to be anisotropic and governed by extensions. The corresponding anisotropic damage model is a nonlocal one. The positivity of the intrinsic dissipation is checked. Mesh independency is gained by nonlocal integral averaging of the Mazars equivalent strain acting in the damage criterion function. The permanent strain and post-peak response of Terrien (1980) and Gopalaratnam and Shah (1985) experimental tensile references are accurately reproduced.
Keywords
- Anistropic damage, Concrete, Heterogeneous materials, ITZ, Multiscale modeling, Permanent strains
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Instrumentation
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
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In: Mechanics of materials, Vol. 207, 105359, 08.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Permanent strains and post-peak tensile response of concrete by three-phase conceptual modeling
AU - Basmaji, A. A.
AU - Fau, A.
AU - Nackenhorst, U.
AU - Desmorat, R.
N1 - Publisher Copyright: © 2025 The Authors
PY - 2025/4/25
Y1 - 2025/4/25
N2 - Plain concrete exhibits pronounced stress softening and permanent strains in uniaxial cyclic tension. The permanent strains in concrete have been measured since the 1980s by repeated tensile loading–unloading sequences. Nevertheless, accurately modeling the permanent strains, as well as the post-peak response, is still a challenge. To overcome it, we propose a conceptual three-phase modeling of concrete discretized by finite elements, consisting of an elastic aggregate phase, a perfectly plastic Interfacial Transition Zone (ITZ), and an anisotropically damaging mortar phase. Damage in mortar is assumed to be anisotropic and governed by extensions. The corresponding anisotropic damage model is a nonlocal one. The positivity of the intrinsic dissipation is checked. Mesh independency is gained by nonlocal integral averaging of the Mazars equivalent strain acting in the damage criterion function. The permanent strain and post-peak response of Terrien (1980) and Gopalaratnam and Shah (1985) experimental tensile references are accurately reproduced.
AB - Plain concrete exhibits pronounced stress softening and permanent strains in uniaxial cyclic tension. The permanent strains in concrete have been measured since the 1980s by repeated tensile loading–unloading sequences. Nevertheless, accurately modeling the permanent strains, as well as the post-peak response, is still a challenge. To overcome it, we propose a conceptual three-phase modeling of concrete discretized by finite elements, consisting of an elastic aggregate phase, a perfectly plastic Interfacial Transition Zone (ITZ), and an anisotropically damaging mortar phase. Damage in mortar is assumed to be anisotropic and governed by extensions. The corresponding anisotropic damage model is a nonlocal one. The positivity of the intrinsic dissipation is checked. Mesh independency is gained by nonlocal integral averaging of the Mazars equivalent strain acting in the damage criterion function. The permanent strain and post-peak response of Terrien (1980) and Gopalaratnam and Shah (1985) experimental tensile references are accurately reproduced.
KW - Anistropic damage
KW - Concrete
KW - Heterogeneous materials
KW - ITZ
KW - Multiscale modeling
KW - Permanent strains
UR - http://www.scopus.com/inward/record.url?scp=105004045521&partnerID=8YFLogxK
U2 - 10.1016/j.mechmat.2025.105359
DO - 10.1016/j.mechmat.2025.105359
M3 - Article
AN - SCOPUS:105004045521
VL - 207
JO - Mechanics of materials
JF - Mechanics of materials
SN - 0167-6636
M1 - 105359
ER -