PSI - Issue 17

Radek Doubrava et al. / Procedia Structural Integrity 17 (2019) 190–197 Radek Doubrava/ Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 1. Test arrangement for impact tests

2.1. Test specimen

High-speed tests on simplified structures represented by flat test composite and metal plates (Fig. 2a) were carried out to verify and optimize the numerical analyses. The use of a flat test specimen allows the testing to define the boundary conditions to be performed during preliminary designs without requiring the design or manufacture of an expensive mould to produce a part. A flat test specimen also allows modelling with a clear mesh geometry and real and consistent boundary conditions between the numerical simulation and the physical test.

Fig. 2. (a) Flat test specimen. (b) Test rig and instrumentation for the specimen displacement measurement during impact

The composite flat test panel was manufactured from a Hexply 8558/AGP193-PW (2017) Carbon Fibre Reinforced Polymer (CFRP) composite laminated shell consisting of 10 layers (45, 0, 45, 0, 45) s impregnated with epoxy resin system as part of a vacuum infusion process. The test specimen was prepared by an autoclave with a prescribed curing process. The material properties are listed in Table 1. Table 1: Material properties of the employed composite material Hexply 8558/AGP193-PW (2017) E1 [MPa] E2 [MPa] Nu12 [MPa] Nu13 [1] Nu23 [1] G12 [MPa] G13 [MPa] G23 [MPa] Hexply 8558/AGP193-PW 60000 60000 0.046 0.32 0.32 5280 3580 3580