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Investigation of strain rate dependent microscopic failure mechanisms in short fiber reinforced plastics using finite element simulations

  • For predicting the strain rate dependent failure of short fiber reinforced plastics (SFRP) a two-phase simulation model is developed using the finite element method and comparing the results to microscopic specimen tests for uniaxial tension under quasi-static (0.007/s) and dynamic loads (250/s). Experimentally the failure behavior of SFRP is observed to be strain rate dependent. The global strainFor predicting the strain rate dependent failure of short fiber reinforced plastics (SFRP) a two-phase simulation model is developed using the finite element method and comparing the results to microscopic specimen tests for uniaxial tension under quasi-static (0.007/s) and dynamic loads (250/s). Experimentally the failure behavior of SFRP is observed to be strain rate dependent. The global strain at failure and the absorbed energy increase with strain rate. Moreover, locally an influence of the strain rate on the amount of material involved in the deformation can be observed. The suggested model can represent these effects accurately. Also, the present micro-mechanical effects and their influence on the strain distribution are investigated by unit cell simulations. Thereby the material model of the fibers, the matrix, and the boundary layer are varied respectively. These reveal the important role of strain rate dependent decohesion leading to a correct representation of the plastically deformed volume. Consequently, the distortion energy density is evaluated and is found to be constant at failure for all strain rates.show moreshow less

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Metadaten
Document Type:Article (reviewed)
Zitierlink: https://opus.hs-offenburg.de/10826
Bibliografische Angaben
Title (English):Investigation of strain rate dependent microscopic failure mechanisms in short fiber reinforced plastics using finite element simulations
Author:Timo SchweigerORCiD, Jörg LienhardStaff MemberORCiDGND, Hannes Grimm-StreleORCiD, Stefan Hiermaier
Year of Publication:2023
Publisher:SAGE Publications
First Page:2483
Last Page:2497
Parent Title (English):Journal of Composite Materials
Volume:57
Issue:15
ISSN:0021-9983 (Print)
ISSN:1530-793X (Online)
DOI:https://doi.org/10.1177/00219983231170716
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 - Namensnennung 4.0 International