A new framework for the formulation and validation of cohesive mixed-mode delamination models.
Saved in:
| Title: | A new framework for the formulation and validation of cohesive mixed-mode delamination models. |
|---|---|
| Authors: | Confalonieri, Federica1 (AUTHOR) federica.confalonieri@unipv.it, Perego, Umberto2 (AUTHOR) umberto.perego@polimi.it |
| Source: | International Journal of Solids & Structures. Jun2019, Vol. 164, p168-190. 23p. |
| Subjects: | Cohesive strength (Mechanics), Orthotropic plates, Delamination of composite materials, Example |
| Abstract: | Abstract A new framework for the formulation and validation of interface cohesive models for mixed mode I-mode II delamination with variable mode-ratio is presented. The approach is based on a free energy decomposition driven by the identification of three main damage modes in the tensile plane of normal and shear tractions and leads to models thermodynamically consistent for any loading path. A model with a bilinear traction-separation law is developed in detail within the proposed framework. The considered model requires a limited number of easily identifiable parameters: the traction-separation laws in the pure modes with their fracture energies, plus two phenomenological parameters, responsible for the mixed-mode interaction between the mode I and mode II failure modes, that directly affect the shape of the damage activation locus, namely an exponent and a constitutive parameter, the latter geometrically defined as an internal angle. The overall fracture energy at any mode-ratio is an outcome of the model, without the need to introduce any empirical laws, and depends on the actually followed loading path. A rigorous validation protocol, including consistency, accuracy and evolutionary tests is proposed and used for the model validation. Several tests proposed in the literature, along different proportional and non-proportional loading paths, with application to the simulation of pure and mixed-mode tests for a variety of composite materials, are considered obtaining in all cases, consistent and accurate results. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Solids & Structures is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 135377613 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: A new framework for the formulation and validation of cohesive mixed-mode delamination models. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Confalonieri%2C+Federica%22">Confalonieri, Federica</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> federica.confalonieri@unipv.it</i><br /><searchLink fieldCode="AR" term="%22Perego%2C+Umberto%22">Perego, Umberto</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> umberto.perego@polimi.it</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Solids+%26+Structures%22">International Journal of Solids & Structures</searchLink>. Jun2019, Vol. 164, p168-190. 23p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Cohesive+strength+%28Mechanics%29%22">Cohesive strength (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Orthotropic+plates%22">Orthotropic plates</searchLink><br /><searchLink fieldCode="DE" term="%22Delamination+of+composite+materials%22">Delamination of composite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Example%22">Example</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract A new framework for the formulation and validation of interface cohesive models for mixed mode I-mode II delamination with variable mode-ratio is presented. The approach is based on a free energy decomposition driven by the identification of three main damage modes in the tensile plane of normal and shear tractions and leads to models thermodynamically consistent for any loading path. A model with a bilinear traction-separation law is developed in detail within the proposed framework. The considered model requires a limited number of easily identifiable parameters: the traction-separation laws in the pure modes with their fracture energies, plus two phenomenological parameters, responsible for the mixed-mode interaction between the mode I and mode II failure modes, that directly affect the shape of the damage activation locus, namely an exponent and a constitutive parameter, the latter geometrically defined as an internal angle. The overall fracture energy at any mode-ratio is an outcome of the model, without the need to introduce any empirical laws, and depends on the actually followed loading path. A rigorous validation protocol, including consistency, accuracy and evolutionary tests is proposed and used for the model validation. Several tests proposed in the literature, along different proportional and non-proportional loading paths, with application to the simulation of pure and mixed-mode tests for a variety of composite materials, are considered obtaining in all cases, consistent and accurate results. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Solids & Structures is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=135377613 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.ijsolstr.2018.12.032 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 168 Subjects: – SubjectFull: Cohesive strength (Mechanics) Type: general – SubjectFull: Orthotropic plates Type: general – SubjectFull: Delamination of composite materials Type: general – SubjectFull: Example Type: general Titles: – TitleFull: A new framework for the formulation and validation of cohesive mixed-mode delamination models. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Confalonieri, Federica – PersonEntity: Name: NameFull: Perego, Umberto IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 00207683 Numbering: – Type: volume Value: 164 Titles: – TitleFull: International Journal of Solids & Structures Type: main |
| ResultId | 1 |
