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A strain rate dependent and anisotropic failure material model for short fiber reinforced plastics based on energy density accounting for local fiber orientation

  • A failure model for SFRP for FEM simulations is developed to describe the strain rate dependency, the influence of the local fiber orientation and of the stress state on the failure behavior. The material is considered as a continuum while internally calculating the micro-mechanics analytically. The described micro-mechanics are based on experimental observations and on analyzation with numericalA failure model for SFRP for FEM simulations is developed to describe the strain rate dependency, the influence of the local fiber orientation and of the stress state on the failure behavior. The material is considered as a continuum while internally calculating the micro-mechanics analytically. The described micro-mechanics are based on experimental observations and on analyzation with numerical studies. In particular the strain rate dependent delamination of fibers and matrix is incorporated in the model. The distortion energy density is defined as the driving value for failure and estimated by the model. This is achieved with the analytic solution by Eshelby for the stress field in the matrix and by introducing an additional phase for the plasticly deformed volume. The validation on characterization specimens as well as component test demonstrates that the influence of strain rate, fiber orientation, and stress state on the failure behavior can be described with only one material parameter, the critical distortion energy density.show moreshow less

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Metadaten
Document Type:Article (reviewed)
Zitierlink: https://opus.hs-offenburg.de/10827
Bibliografische Angaben
Title (English):A strain rate dependent and anisotropic failure material model for short fiber reinforced plastics based on energy density accounting for local fiber orientation
Author:Timo SchweigerORCiD, Jörg LienhardStaff MemberORCiDGND, Stefan Hiermaier
Year of Publication:2023
Publisher:SAGE Publications
First Page:2013
Last Page:2028
Parent Title (English):Journal of Composite Materials
Volume:57
Issue:12
ISSN:0021-9983 (Print)
ISSN:1530-793X (Online)
DOI:https://doi.org/10.1177/00219983231167714
Language:English
Inhaltliche Informationen
Institutes:Veröffentlichungen außerhalb der Hochschulzeit
Tag:Composites; debonding; failure; micro-mechanics; modelling; strain rate effects
Formale Angaben
Open Access: Open Access 
 Hybrid 
Licence (German):License LogoCreative Commons - CC BY-NC - Namensnennung - Nicht kommerziell 4.0 International