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A low velocity impact study on press formed thermoplastic honeycomb sandwich panels

  • At present plywood structures are used in the loading area of utility structures. Low velocity impact studies on these structures showed cracks on its lower surface. Hence, in the current study low-velocity impact of a lighter honeycomb sandwich structure is investigated to satisfy the needs of the utility vehicle segment. To meet this objective, facing sheets are manufactured using the polypropylene matrix and glass fibers. Polypropylene honeycombs are used in the study. Depending on the experimental boundary conditions, a cross-ply laminate set up is used for the facing sheets. An impact energy of 100 J is chosen in the study. This energy caused visible failure on the plywood sample. Hence a lighter sandwich construction which can resist 100 J impact is implemented in this study. Influence of top and bottom facing sheet thicknesses on the amount of damage inflicted on its surfaces are studied. Experimental histories of absorbed energy and contact force are recorded. A finite element analysis is performed using LS-DYNA and numericalAt present plywood structures are used in the loading area of utility structures. Low velocity impact studies on these structures showed cracks on its lower surface. Hence, in the current study low-velocity impact of a lighter honeycomb sandwich structure is investigated to satisfy the needs of the utility vehicle segment. To meet this objective, facing sheets are manufactured using the polypropylene matrix and glass fibers. Polypropylene honeycombs are used in the study. Depending on the experimental boundary conditions, a cross-ply laminate set up is used for the facing sheets. An impact energy of 100 J is chosen in the study. This energy caused visible failure on the plywood sample. Hence a lighter sandwich construction which can resist 100 J impact is implemented in this study. Influence of top and bottom facing sheet thicknesses on the amount of damage inflicted on its surfaces are studied. Experimental histories of absorbed energy and contact force are recorded. A finite element analysis is performed using LS-DYNA and numerical results are compared with the experimental responses. A honeycomb sandwich panel [0/90/90/0/Core/0/90/90/0] meeting the objective of the study is seen as an optimum replacement for the existing plywood structures.show moreshow less

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Author: Manoja Rao Yellur, Holger SeidlitzORCiD, Felix KukeORCiD, Kevin Wartig, Nikolas Tsombanis
URL:http://www.sciencedirect.com/science/article/pii/S0263822318334743
DOI:https://doi.org/10.1016/j.compstruct.2019.111061
ISSN:0263-8223
Title of the source (English):Composite Structures
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2019
Tag:Finite element analysis (FEA); Honeycomb core; Low-velocity impact; Sandwich panel
Volume/Year:225
Number of pages:10
First Page:111061
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Polymerbasierter Leichtbau
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