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Experimental and Numerical Investigation of the Mechanical Properties of 3D-Printed Hybrid and Non-Hybrid Composites

  • Recent research efforts have highlighted the potential of hybrid composites in the context of additive manufacturing. The use of hybrid composites can lead to an enhanced adaptability of the mechanical properties to the specific loading case. Furthermore, the hybridization of multiple fiber materials can result in positive hybrid effects such as increased stiffness or strength. In contrast to the literature, where only the interply and intrayarn approach has been experimentally validated, this study presents a new intraply approach, which is experimentally and numerically investigated. Three different types of tensile specimens were tested. The non-hybrid tensile specimens were reinforced with contour-based fiber strands of carbon and glass. In addition, hybrid tensile specimens were manufactured using an intraply approach with alternating carbon and glass fiber strands in a layer plane. In addition to experimental testing, a finite element model was developed to better understand the failure modes of the hybrid and non-hybrid specimens. The failure was estimated using the Hashin and Tsai–Wu failure criteria. The specimens showed similar strengths but greatly different stiffnesses based on the experimental results. The hybrid specimens demonstrated a significant positive hybrid effect in terms of stiffness. Using FEA, the failure load and fracture locations of the specimens were determined with good accuracy. Microstructural investigations of the fracture surfaces showed notable evidence of delamination between the different fiber strands of the hybrid specimens. In addition to delamination, strong debonding was particularly evident in all specimen types.

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Author:Tim HeitkampORCiD, Simon GirnthORCiD, Sebastian KuschmitzORCiDGND, Nils Waldt, Günter KlawitterGND, Thomas VietorORCiDGND
DOI original:https://doi.org/10.3390/polym15051164
Parent Title (English):Polymers - Special Issue "Additive Manufacturing of Polymer-Based Composite Materials"
Editor:Ghaus Rizvi, Amir Hossein Behravesh
Document Type:Article
Year of Completion:2023
Publishing Institution:Hochschule Hannover
Release Date:2023/03/08
Tag:continuous fiber; fiber-reinforced additive manufacturing; finite element analysis (FEA); hybrid composites; hybrid fiber-reinforced polymers; material extrusion
GND Keyword:Extrudieren
Page Number:22
Link to catalogue:1845390849
Institutes:Fakultät II - Maschinenbau und Bioverfahrenstechnik
DDC classes:670 Industrielle und handwerkliche Fertigung
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International