Explicit dynamics simulation of blade cutting of thin elastoplastic shells using “directional” cohesive elements in solid-shell finite element models.
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| Title: | Explicit dynamics simulation of blade cutting of thin elastoplastic shells using “directional” cohesive elements in solid-shell finite element models. |
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| Authors: | Pagani, Mara1 mara.pagani@comsol.com, Perego, Umberto2 umberto.perego@polimi.it |
| Source: | Computer Methods in Applied Mechanics & Engineering. Mar2015, Vol. 285, p515-541. 27p. |
| Subjects: | Simulation methods & models, Elastoplasticity, Cohesive strength (Mechanics), Finite element method, Nonlinear theories, Deformations (Mechanics), Crack propagation |
| Abstract: | The intentional or accidental cutting of thin shell structures by means of a sharp object is of interest in many engineering applications. The process of cutting involves several types of nonlinearities, such as large deformations, contact, crack propagation and, in the case of laminated shells, delamination. In addition to these, a special difficulty is represented by the blade sharpness, whose accurate geometric resolution would require meshes with characteristic size of the order of the blade curvature radius. A computational finite element approach for the simulation of blade cutting of thin shells is proposed and discussed. The approach is developed in an explicit dynamics framework. Solid-shell elements are used for the discretization, in view of possible future inclusion in the model of delamination processes. Since a sharp blade can interfere with the transmission of cohesive forces between the crack flanks in the cohesive process zone, standard cohesive interface elements are not suited for the simulation of this type of problems unless extremely fine meshes, with characteristic size comparable to the blade curvature radius, are used. To circumvent the problem, the use of a new type of directional cohesive interface element, previously proposed for the simulation of crack propagation in elastic shells, is further developed and reformulated for application to the cutting of elastoplastic thin structures, discretized by solid-shell elements. The proposed approach is validated by means of application to several cutting problems of engineering interest. [ABSTRACT FROM AUTHOR] |
| Copyright of Computer Methods in Applied Mechanics & Engineering is the property of Elsevier B.V. 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 |
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| Header | DbId: egs DbLabel: Engineering Source An: 101036602 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Explicit dynamics simulation of blade cutting of thin elastoplastic shells using “directional” cohesive elements in solid-shell finite element models. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Pagani%2C+Mara%22">Pagani, Mara</searchLink><relatesTo>1</relatesTo><i> mara.pagani@comsol.com</i><br /><searchLink fieldCode="AR" term="%22Perego%2C+Umberto%22">Perego, Umberto</searchLink><relatesTo>2</relatesTo><i> umberto.perego@polimi.it</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Computer+Methods+in+Applied+Mechanics+%26+Engineering%22">Computer Methods in Applied Mechanics & Engineering</searchLink>. Mar2015, Vol. 285, p515-541. 27p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Simulation+methods+%26+models%22">Simulation methods & models</searchLink><br /><searchLink fieldCode="DE" term="%22Elastoplasticity%22">Elastoplasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Cohesive+strength+%28Mechanics%29%22">Cohesive strength (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink><br /><searchLink fieldCode="DE" term="%22Nonlinear+theories%22">Nonlinear theories</searchLink><br /><searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Crack+propagation%22">Crack propagation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The intentional or accidental cutting of thin shell structures by means of a sharp object is of interest in many engineering applications. The process of cutting involves several types of nonlinearities, such as large deformations, contact, crack propagation and, in the case of laminated shells, delamination. In addition to these, a special difficulty is represented by the blade sharpness, whose accurate geometric resolution would require meshes with characteristic size of the order of the blade curvature radius. A computational finite element approach for the simulation of blade cutting of thin shells is proposed and discussed. The approach is developed in an explicit dynamics framework. Solid-shell elements are used for the discretization, in view of possible future inclusion in the model of delamination processes. Since a sharp blade can interfere with the transmission of cohesive forces between the crack flanks in the cohesive process zone, standard cohesive interface elements are not suited for the simulation of this type of problems unless extremely fine meshes, with characteristic size comparable to the blade curvature radius, are used. To circumvent the problem, the use of a new type of directional cohesive interface element, previously proposed for the simulation of crack propagation in elastic shells, is further developed and reformulated for application to the cutting of elastoplastic thin structures, discretized by solid-shell elements. The proposed approach is validated by means of application to several cutting problems of engineering interest. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Computer Methods in Applied Mechanics & Engineering is the property of Elsevier B.V. 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.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.cma.2014.11.027 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 27 StartPage: 515 Subjects: – SubjectFull: Simulation methods & models Type: general – SubjectFull: Elastoplasticity Type: general – SubjectFull: Cohesive strength (Mechanics) Type: general – SubjectFull: Finite element method Type: general – SubjectFull: Nonlinear theories Type: general – SubjectFull: Deformations (Mechanics) Type: general – SubjectFull: Crack propagation Type: general Titles: – TitleFull: Explicit dynamics simulation of blade cutting of thin elastoplastic shells using “directional” cohesive elements in solid-shell finite element models. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Pagani, Mara – PersonEntity: Name: NameFull: Perego, Umberto IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 00457825 Numbering: – Type: volume Value: 285 Titles: – TitleFull: Computer Methods in Applied Mechanics & Engineering Type: main |
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