Low Velocity Impact and Compression-After-Impact Response of Z-Pin Reinforced Core Sandwich Composites  

Oleh:

Vaidya, U. K. ; Palazotto, A. N. ; Gummadi, L. N. B.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Engineering Materials and Technology vol. 122 no. 4 (2000), page 434-442.
Topik: composite; low velocity; impact; compression - after -impact; reinforced core ; sandwich composites

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ87.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

In the current work, sandwich composite structures with innovative constructions referred to as Z - pins, or truss core pins, are investigated. The Z - pin core sandwich construction offers enhanced transverse stiffness, high damage resistance, and multi - functional benefits. The present study deals with analysis of low - velocity impact (LVI) of Z - pin sandwich plate, and experimental studies of compression - after - impact characterization. Experimental studies on LVI of Z - pin sandwich plate considered in the analysis have been reported in Vaidya, et al., 1999, "Low Velocity Impact Response of Laminated Sandwich Composites with Hollow and Foam - Filled Z - Pin Reinforced Core," Journal of Composites Technology and Research, JCTRER, 21, No. 2, Apr., pp. 84 – 97, where the samples were subjected to 11, 20, 28, 33, and 40 J of impact energy. The LVI analysis is developed with regards to Z - pin buckling as a primary failure mode (and based on experimental observations). A finite element model accounting for buckling of the pins has been developed and analyzed using ABAQUS. This paper also presents experimental results on compression - after - impact (CAI) studies which were performed on the sandwich composites with Z - pin reinforced core "with" and "without" foam. The experimental LVI tests were performed in Vaidya, et al., 1999, "Low Velocity Impact Response of Laminated Sandwich Composites with Hollow and Foam - Filled Z - Pin Reinforced Core," Journal of Composites Technology and Research, JCTRER, 21, No. 2, Apr., pp. 84 – 97. The results indicate that selective use of Z - pin core is a viable idea in utilizing space within the core for sandwich composites in structural applications.

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