This study investigates the effect of face materials, Z-pin types and distribution densities on drop-weight impact properties of foam core sandwich composites. The novelty of this study is to eliminate damage of face part by only reinforcing the core part of sandwich structures. Impact test was performed at different energy levels (20–50 J). The addition of Z-pins into the sandwich composites decreased the elasticity and ductility while it increased the stiffness of sandwich composites. The Z-pin reinforcement increased the peak forces, but decreased the peak deformations of the sandwich composites. However, higher energy absorption was only observed at the higher Z-pin distribution density. The results showed that Z-pin distribution density, bonding between the face sheets/pins, and the face sheet material have a great influence on the impact behaviour of the Z-pin-reinforced sandwich composites besides the Z-pin types.
Hoa SV. Principles of the manufacturing of composite materials. 2nd ed. USA: DEStch Publications, 2009, pp.16–55.
2.
YangBWangZZhouL, et al.Study on the low-velocity impact response and CAI behaviour of foam-filled sandwich panels with hybrid facesheet. Compos Struct2015; 132: 1129–1140.
3.
Partridge IK, Cartie DDR and Bonnington T. Manufacture and performance of Z-pinned composites. In: Advani S and Shonaike G (eds) Advanced polymeric materials: structure-property relationships. Boca Raton, FL: CRC Press, 2003, pp.22–84.
4.
Carstensen T, Cournoyer D, Kunkel E and Magee C. X-Coradvanced sandwich core material. In: Proceedings of the 33rd international SAMPE technical conference, Seattle, WA, 5-8 November 2001.
5.
ShiSSSunZHuaXZ, et al.Carbon-fiber and aluminum-honeycomb sandwich composites with and without Kevlar-fiber interfacial toughening. Compos Part A2014; 67: 102–110.
6.
AkatayABoraMÖÇobanO, et al.The influence of low velocity repeated impacts on residual compressive properties of honeycomb sandwich structures. Compos Struct2015; 125: 425–433.
7.
MeoMVignjevicRMarengoG. The response of honeycomb sandwich panels under low-velocity impact loading. Int J Mech Sci2005; 47: 1301–1325.
8.
GustinJJonesonAMahinfalahM, et al.Low velocity impact of combination Kevlar/carbon fibre sandwich composites. Compos Struct2005; 69: 396–406.
9.
ShahdinAMezeixLBouvetC, et al.Fabrication and mechanical testing of glass fibre entangled sandwich beams: a comparison with honeycomb and foam sandwich beam. Compos Struct2009; 90: 404–412.
10.
CabreraNOAlcockBPeijsT. Design and manufacture of all-PP sandwich panels based on co-extruded polypropylene tapes. Compos Part B2008; 39: 1183–1195.
11.
XuGYangFZengT, et al.Bending behaviour of graded corrugated truss core composite sandwich beams. Compos Struct2016; 138: 342–351.
12.
FanHZhaoLChenH, et al.Ductile deformation mechanisms and designing instructions for integrated woven textile sandwich composites. Compos Sci Technol2012; 72: 1338–1343.
13.
LascoupBAbouraZKhellilK, et al.On the mechanical effect of stitch addition in sandwich panel. Compos Sci Technol2006; 66: 1385–1398.
14.
GuanZWAktasAPotluriP, et al.The blast resistance of stitched sandwich panels. Int J Impact Eng2014; 65: 137–145.
15.
SanthanakrishnanRSamlalSJoseph StanleyA, et al.Impact study on sandwich panels with and without stitching. Adv Compos Mater2018; 27: 163–182.
16.
HanFYanYMaJ. Experimental study and progressive failure analysis of stitched foam-core sandwich composites subjected to low-velocity impact. Polym Compos2018; 39: 624–635.
17.
XiaFWuX-Q. Study on impact properties of through-thickness stitched foam sandwich composites. Compos Struct2010; 92: 412–421.
18.
MartinsATAbouraZHariziW, et al.Analysis of the impact and compression after impact behavior of tufted laminated composites. Compos Struct2018; 184: 352–361.
19.
HartleyJWKratzJWardC, et al.Effect of tufting density and loop length on the crushing behaviour of tufted sandwich specimens. Compos Part B Eng2017; 112: 49–56.
20.
YalkinHEIctenBMAlpyildizT. Tensile and compressive performances of foam core sandwich composites with various core modifications. J Sandwich Struct Mater2017; 19: 49–65.
21.
MarascoAICartiéDDRPartridgeIK, et al.Mechanical properties balance in novel Z-pinned sandwich panels: out-of-plane properties. Compos Part A Appl Sci Manuf2006; 37: 295–302.
22.
LongDGuiqiongJTaoH. Investigation of the effect of Z-pin reinforcement on the collapse of foam-cored sandwich panels. J Reinf Plast Compos2008; 27: 1211–1224.
23.
DuLJiaoG. Indentation study of Z-pin reinforced polymer foam core sandwich structures. Compos Part A Appl Sci Manuf2009; 40: 822–829.
24.
VaidyaUKamathMHosurM, et al.Low-velocity impact response of cross-ply laminated sandwich composites with hollow and foam-filled Z-pin reinforced core. ASTM Int1999; 21: 84–97.
25.
JayaramRNagarajanVVinod KumarK. Compression and low velocity impact response of sandwich panels with polyester pin-reinforced foam filled honeycomb core. J Sandwich Struct Mater2018; Epub ahead of print 7 August 2018. DOI: 10.1177/1099636218792675.
26.
BaralN, et al.Improved impact performance of marine sandwich panels using through-thickness reinforcement: experimental results. Compos Part B Eng2010; 41: 117–123.
27.
VaidyaUK, et al.Processing and high strain rate impact response of multi-functional sandwich composites. Compos Struct2001; 52: 429–440.
28.
NanayakkaraAFeihSMouritzAP. Experimental impact damage study of a z-pinned foam core sandwich composite. J Sandwich Struct Mater2012; 14: 469–486.
29.
AbdiB, et al.Comparison of foam core sandwich panel and through-thickness polymer pin-reinforced foam core sandwich panel subject to indentation and flatwise compression loadings. Polym Compos2016; 37: 612–619.
30.
PalazottoAN, et al.Low velocity impact damage characteristics of Z-fibre reinforced sandwich panels: an experimental study. Compos Struct1998; 43: 275–288.
31.
DostKimya. Kompozit.net, www.kompozit.net/ (accessed 25 September 2018).
32.
ASTM D792: 2013. Standard test methods for density and specific gravity (relative density) of plastics by displacement.
33.
ASTM D3171: 2015. Standard test methods for constituent content of composite materials.
34.
CherifZEPoilaneCFalherT, et al.Influence of textile treatment on mechanical and sorption properties of flax/epoxy composites. Polym Compos2013; 34: 1761–1773.
35.
ASTM D7136: 2015. Standard test method for measuring the damage resistance of a fiber-reinforced polymer matrix composite to a drop-weight impact event.
36.
SelverEKayaG. Flexural properties of sandwich composite laminates reinforced with glass and carbon Z-pins. J Compos Mater2019; 53: 1347–1359.
37.
HosurMVAdbullahMJeelaniS. Studies on the low-velocity impact response of woven hybrid composites. Compos Struct2005; 67: 253–262.
