PSI - Issue 82

Sana Ullah et al. / Procedia Structural Integrity 82 (2026) 138–145 S. Ullah et al. / Structural Integrity Procedia 00 (2026) 000–000

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Fig 2. (a) CFRP tensile stress-strain; (b) Pyrolyzed C/C tensile stress-strain.

Fig 3. (a) CFRP shear stress-strain; (b) Pyrolyzed C/C shear stress-strain.

CFRP 0°/90° plan

CFRP 0°/90° lateral

CFRP 45°/-45° plan

CFRP 45°/-45° lateral

Fig. 4. Microscopic plan and lateral views of [T0°] and [T45°] specimens. The damage phenomenon in both [T0°] and [T45°] is being further studied using microscopic images of the surface and transversal section of the tested specimens. From Fig.4 , in [T0°] specimen, the shift of 90° laminate from the right angle, breakage of fibres inside yarns after the failure, and matrix cracking and removal from the surface of yarns and inside the composite can be observed. Along the thickness direction, delamination between carbon fibre layers along the crack propagation and fibre as well as the matrix cracking was found.