Dimensioning of Punctiform Metal-Composite Joints: A Section-Force Related Failure Criterion

  • Reliable line production processes and simulation tools play a central role for the structural integration of thermoplastic composites in advanced lightweight constructions. Provided that material-adapted joining technologies are available, they can be applied in heavy-duty multi-material designs (MMD). A load-adapted approach was implemented into the new fully automatic and faulttolerant thermo mechanical flow drill joining (FDJ) concept. With this method it is possible to manufacture reproducible high strength FRP/metal-joints within short cycle times and without use of extra joining elements for the first time. The analysis of FDJ joints requires a simplified model of the joint to enable efficient numerical simulations. The present work introduces a strategy in modeling a finite-element based analogous-approach for FDJ-joints with glass fiber reinforced polypropylene and high-strength steel. Combined with a newly developed section-force related failure criterion, it is possible to predict the fundamental failure behavior inReliable line production processes and simulation tools play a central role for the structural integration of thermoplastic composites in advanced lightweight constructions. Provided that material-adapted joining technologies are available, they can be applied in heavy-duty multi-material designs (MMD). A load-adapted approach was implemented into the new fully automatic and faulttolerant thermo mechanical flow drill joining (FDJ) concept. With this method it is possible to manufacture reproducible high strength FRP/metal-joints within short cycle times and without use of extra joining elements for the first time. The analysis of FDJ joints requires a simplified model of the joint to enable efficient numerical simulations. The present work introduces a strategy in modeling a finite-element based analogous-approach for FDJ-joints with glass fiber reinforced polypropylene and high-strength steel. Combined with a newly developed section-force related failure criterion, it is possible to predict the fundamental failure behavior in multi-axial stress states. The functionality of the holistic approach is illustrated by a demonstrator that represents a part of a car body-in-white structure. The comparison of simulated and experimentally determined failure loads proves the applicability for several combined load cases.show moreshow less

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Metadaten
Author: Holger SeidlitzORCiD, Lars Ulke-WinterORCiD, Colin Gerstenberger, Lothar Kroll
DOI:https://doi.org/10.4236/ojcm.2014.43018
ISSN:2164-5655
Title of the source (English):Open Journal of Composite Materials
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2014
Tag:Composites; FDJ Joint; Failure Criterion; Hybrid; Joining; Multi-Material-Design
Volume/Year:4
Issue number:3
First Page:157
Last Page:172
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Polymerbasierter Leichtbau
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