Experimental and numerical development on multi-material joining technology for sandwich-structured composite materials
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Authors
Rheme, Martin
Eckhard, Gregor
Bersier, Valentin
Glavaški, Slobodan
Pfeiffer, Ricardo
Author (Corporation)
Publication date
12.10.2021
Typ of student thesis
Course of study
Collections
Type
01A - Journal article
Editors
Editor (Corporation)
Supervisor
Parent work
Materials
Special issue
DOI of the original publication
Link
Series
Series number
Volume
14
Issue / Number
20
Pages / Duration
Patent number
Publisher / Publishing institution
MDPI
Place of publication / Event location
Edition
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Practice partner / Client
Abstract
Creating connection points for sandwich-structured composites without losing technical performance is key to realising optimal lightweight structures. The patented LiteWWeight® technology presents cost-effective connections on sandwich panels in a fraction of a few seconds without predrilling. Ultrasonic equipment is used to insert a thermoplastic fastener into the substrate material and partially melt it into the porous internal structure. This creates a highly interlocked connection (connection strength is above 500 N) suitable for semi-structural applications. This study focused on the simulation and experimental validation of this process, mainly on the interaction between the pin and the substrate material during the joining process. The dynamic thermo-mechanical model showed reasonable agreement with experimental methods such as process data, high-speed camera monitoring or computed tomography and allowed the prediction of the connection quality by evaluation of the degree of interlock. The connection strength prediction by the developed model was validated within several various process setups, resulting in a prediction accuracy between 94–99% depending on the setup.
Keywords
Subject (DDC)
620 - Ingenieurwissenschaften und Maschinenbau
Event
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ISBN
ISSN
1521-4095
0935-9648
0935-9648
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Gold
License
Citation
ZWEIFEL, Lucian, Igor ZHILYAEV, Christian BRAUNER, Martin RHEME, Gregor ECKHARD, Valentin BERSIER, Slobodan GLAVAŠKI und Ricardo PFEIFFER, 2021. Experimental and numerical development on multi-material joining technology for sandwich-structured composite materials. Materials. 12 Oktober 2021. Bd. 14, Nr. 20. DOI 10.3390/ma14206005. Verfügbar unter: https://doi.org/10.26041/fhnw-4942