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GÜÇLÜ, HARUN

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    Publication
    Impact behavior of natural rubber based syntactic foam core sandwich structures
    (Walter, 2021-11-01) Güçlü, Harun; Kasım, Hasan; Türkoğlu, I. Kürşad; Can, Yucel; Yazıcı, Murat; GÜÇLÜ, HARUN; YAZICI, MURAT; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Otomotiv Mühendisliği Bölümü; 0000-0002-5679-313X; 0000-0002-8720-7594; M-4741-2017; Q-8738-2018
    In this study, the impact behavior of sandwich panels of natural rubberbased syntactic foam cores with aluminum face sheets was investigated experimentally and with the help of finite element analysis (FEA). Syntactic foam cores were produced byadding glass bubbles (GB) to the natural rubber (NR). Natural rubber was dissolved at room temperature with chemical solvents mixed with glass bubbles at 10, 20, and 30 weight percentages. Very low density (similar to 0.8 g x cm(-3)) and high compressible foams were obtained depending on the GB weight percentages. Aluminum face sheets and the NR/GB syntactic foam core developed were joined by adhesive bonding to produce sandwich beam specimens. The sandwich beams manufactured in this way were subjected to impact loading under three-point bending boundary conditions experimentally. The experimental results were compared with finite element simulation results under the same loading and boundary conditions. The damage mechanism of the sandwich panels devised were analyzed. According to the results, natural rubber containing an additive of 20 wt.-% GBs showed better impact resistance than the others.
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    Impact loading performance of polymer foam core aluminium sandwich panels
    (Polish Acad Sciences Inst Physics, 2019-04-01) Can, Yücel; Türkoğlu, I. K.; Güçlü, H.; GÜÇLÜ, HARUN; Kaşar, I.; Yazıcı, M.; YAZICI, MURAT; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Otomotiv Mühendisliği Anabilim Dalı.; 0000-0002-5679-313X; 0000-0002-8720-7594; Q-8738-2018; M-4741-2017
    In this study, two different foam core aluminum face sheets sandwich panels were developed. The core materials were selected as expanded polypropylene (EPP) and extruded polystyrene (XPS) foams. Two aluminum face sheets and foam cores were combined with flexible epoxy-based adhesives, under 20 N static compression load. The average density of the produced sandwich panels was 0.39 g/cm(3) for EPP foam core sandwich and 0.33 g/cm(3) for XPS foam core sandwich panel. Produced specimens were subjected 3-point bending experiments under impact loading. Damage behavior of the sandwiches was observed using post-mortem pictures. The results show that the produced sandwiches damaged perfectly plastic deformations with face sheets and core. There was not any adhesive and cohesive failure in the core and face sheets interfaces.