PSI - Issue 2_A

Tarpani J.R. et al. / Procedia Structural Integrity 2 (2016) 136–143 Tarpani et al. / Structural Integrity Procedia 00 (2016) 000–000

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(c) (d) Fig. 3. “A” section views by NMRI in the region of maximum damage at half-length of the PPS-CF coupon fractured in delamination mode: (a) FLASH-3D protocol with the highest image resolution; (b) RARE-2D protocol; (c) FLASH-2D protocol; (d) FLASH-3D standard protocol with the lowest image resolution. The damage created by tensile stresses developed during the bending of the specimen is highlighted by a dashed gray rectangle, while relatively small image distortions caused by electromagnetic effects resulting from the electrical conductivity of the carbon fibre reinforcement are spotted by a dotted gray circle.

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(a) (b) Fig. 4. Distinct sectional views of EPX-CF test coupons displaying: (a) Translaminar type fracture highlighted in the dotted gray square according to C section view at mid-thickness of the test coupon; (b) Delamination fracture spotted in the dashed gray square according to S section view at mid-width of the test coupon. Protocols used: RARE-2D and FLASH-2D, respectively. 4.3 Unbalanced translaminar fracture Figure 5a presents an A section view taken in the region of maximum damage of an EPX-CF specimen fractured in translaminar mode, namely at its mid-length where a pre-notch was introduced in order to favour translaminar damage growth. Figures 5b,c refer to different C section views adjacent to one lateral of the test coupon, and the