A phase-field model for strain localization analysis in softening elastoplastic materials

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Abstract

The present paper deals with the localization of strains in those structures consisting of materials exhibit- ing plastic softening response. It is assumed that strain localization develops in a finite thickness band separated from the remaining part of the structure by weak discontinuity surfaces. In view of the small thickness of the band with respect to the dimensions of the structure, the interphase concept is used for the mechanical modeling of the localization phenomenon. We propose a formulation for the quasi- static modeling of strain localization based on a phase-field approach. In this sense, the localization band is smeared over the volume of the structure and a smooth transition between the fully broken and the sound material phases is introduced. The mechanical performance of the model is illustrated for the case of uniaxial tensile test, discussing the instability of the force-displacement response, and for the case of three-point bending test, comparing the analytical results with the experimental ones.
Lingua originaleEnglish
pagine (da-a)84-96
Numero di pagine13
RivistaInternational Journal of Solids and Structures
Volume172-173
Stato di pubblicazionePublished - 2019

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title = "A phase-field model for strain localization analysis in softening elastoplastic materials",
abstract = "The present paper deals with the localization of strains in those structures consisting of materials exhibit- ing plastic softening response. It is assumed that strain localization develops in a finite thickness band separated from the remaining part of the structure by weak discontinuity surfaces. In view of the small thickness of the band with respect to the dimensions of the structure, the interphase concept is used for the mechanical modeling of the localization phenomenon. We propose a formulation for the quasi- static modeling of strain localization based on a phase-field approach. In this sense, the localization band is smeared over the volume of the structure and a smooth transition between the fully broken and the sound material phases is introduced. The mechanical performance of the model is illustrated for the case of uniaxial tensile test, discussing the instability of the force-displacement response, and for the case of three-point bending test, comparing the analytical results with the experimental ones.",
author = "Giuseppe Giambanco and {La Malfa Ribolla}, Emma",
year = "2019",
language = "English",
volume = "172-173",
pages = "84--96",
journal = "International Journal of Solids and Structures",
issn = "0020-7683",
publisher = "Elsevier Limited",

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TY - JOUR

T1 - A phase-field model for strain localization analysis in softening elastoplastic materials

AU - Giambanco, Giuseppe

AU - La Malfa Ribolla, Emma

PY - 2019

Y1 - 2019

N2 - The present paper deals with the localization of strains in those structures consisting of materials exhibit- ing plastic softening response. It is assumed that strain localization develops in a finite thickness band separated from the remaining part of the structure by weak discontinuity surfaces. In view of the small thickness of the band with respect to the dimensions of the structure, the interphase concept is used for the mechanical modeling of the localization phenomenon. We propose a formulation for the quasi- static modeling of strain localization based on a phase-field approach. In this sense, the localization band is smeared over the volume of the structure and a smooth transition between the fully broken and the sound material phases is introduced. The mechanical performance of the model is illustrated for the case of uniaxial tensile test, discussing the instability of the force-displacement response, and for the case of three-point bending test, comparing the analytical results with the experimental ones.

AB - The present paper deals with the localization of strains in those structures consisting of materials exhibit- ing plastic softening response. It is assumed that strain localization develops in a finite thickness band separated from the remaining part of the structure by weak discontinuity surfaces. In view of the small thickness of the band with respect to the dimensions of the structure, the interphase concept is used for the mechanical modeling of the localization phenomenon. We propose a formulation for the quasi- static modeling of strain localization based on a phase-field approach. In this sense, the localization band is smeared over the volume of the structure and a smooth transition between the fully broken and the sound material phases is introduced. The mechanical performance of the model is illustrated for the case of uniaxial tensile test, discussing the instability of the force-displacement response, and for the case of three-point bending test, comparing the analytical results with the experimental ones.

UR - http://hdl.handle.net/10447/358462

M3 - Article

VL - 172-173

SP - 84

EP - 96

JO - International Journal of Solids and Structures

JF - International Journal of Solids and Structures

SN - 0020-7683

ER -