@article{ajme20261411,
author={{Al-Noman, Saeed and S., Somia Alfatih M. and Gronfula, Mohammed Ghazi and Al-Mekhlafi, Galal and Abdellah, Mohammed Y. and AlAliw, Abdulmajid and Hassan, Mohammed K.},
title={Mechanical Performance and Crack Propagation Resistance in 3D-Printed Nylon-Carbon Composites},
journal={American Journal of Mechanical Engineering},
volume={14},
number={1},
pages={1--6},
year={2026},
url={https://pubs.sciepub.com/ajme/14/1/1},
issn={2328-4110},
abstract={<b>  </b>This study investigates the fracture toughness of 3D-printed Polyamide 12 (PA-12) reinforced with carbon fiber. Tensile tests demonstrated an average ultimate tensile strength of 74.24 MPa. Compact tension tests on specimens (W=14 mm, B=4 mm, a=8 mm) revealed a critical load of 1.8 kN. The fracture toughness (K<SUB>IC</SUB>) was calculated as 36.8 MPa¡Ìm following ASTM E399 standards. Using an experimental elastic modulus of 5 GPa typical for carbon fiber reinforced PA-12 composites, the corresponding critical strain energy release rate (G<SUB>IC</SUB>) was determined to be <b>245</b> kJ/m2. This substantial fracture resistance, combined with the observed mixed-mode failure mechanisms including fiber bridging and matrix deformation, indicates that 3D-printed PA-12 carbon fiber composites offer promising damage tolerance for structural applications.},
doi={10.12691/ajme-14-1-1}
publisher={Science and Education Publishing}
}