Deformation behavior of FRP-metal composites locally reinforced with carbon fibers

18th Chemnitz Seminar on Materials Engineering – 18. Werkstofftechnisches Kolloquium

Scholze, M.^1 ; Kolonko, A.^1 ; Lindner, T.^1 ; Lampke, T.^1 ; Helbig, F.^2

Department of Materials and Surface Engineering, Institute of Materials Science and Engineering, Technische Universitaet Chemnitz, Erfenschlager Str. 73, Chemnitz

09125, Germany^1

Endowed Chr. Textile Plastic Composites, Institute of Lightweight Structures, Technische Universitaet Chemnitz, Reichenhainer Str. 31/33, Chemnitz

09126, Germany^2

关键词: Consolidation process;    D. digital image correlation (DIC);    Deformation behavior;    Deformation mechanism;    Local fiber orientation;    Mechanical interlock;    Thermal spray coatings;    Three-point bending test;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/118/1/012040/pdf
DOI  :  10.1088/1757-899X/118/1/012040

来源: IOP

【 摘 要 】

This study investigates variations of hybrid laminates, consisting of one aluminum sheet and a unidirectional glass fiber (GF) reinforced polyamide 6 (PA6) basic structure with partial carbon fiber (CF) reinforcement. To create these heterogeneous FRP laminates, it is necessary to design and produce semi-finished textile-based products. Moreover, a warp knitting machine in conjunction with a warp thread offset unit was used to generate bionic inspired compounds. By the variation of stacking prior to the consolidation process of the hybrid laminate, an oriented CF reinforcement at the top and middle layer of the FRP is realized. In both cases the GFRP layer prevents contact between the aluminum and carbon fibers. In so doing, the high strength of carbon fibers can be transferred to the hybrid laminate in load directions with an active prevention of contact corrosion. The interface strength between thermoplastic and metal component was improved by a thermal spray coating on the aluminum sheet. Because of the high surface roughness and porosity, mechanical interlock was used to provide high interface strength without bonding agents between both components. The resulting mechanical properties of the hybrid laminates are evaluated by three point bending tests in different load directions. The effect of local fiber orientation and layer positioning on failure and deformation mechanism is additionally investigated by digital image correlation (DIC).