Cartié Denis, Lan Marine, Davies Peter, Baley Christophe
Coriolis Composites SAS, Rue Condorcet, Z.A. du Mourillon, 56350 Quéven, France.
IRDL, Université de Bretagne Sud, UMR CNRS 6027, Rue de Saint Maudé, 56000 Lorient, France.
Materials (Basel). 2021 Sep 15;14(18):5332. doi: 10.3390/ma14185332.
Automated fiber placement (AFP), once limited to aerospace, is gaining acceptance and offers great potential for marine structures. This paper describes the influence of manufacturing defects, gaps, and overlaps, on the out-of-plane properties of carbon/epoxy composites manufactured by AFP. Apparent interlaminar shear strength measured by short beam shear tests was not affected by the presence of defects. However, the defects do affect delamination propagation. Under Mode I (tension) loading a small crack arrest effect is noted, resulting in higher apparent fracture energies, particularly for specimens manufactured using a caul plate. Under Mode II (in-plane shear) loading there is a more significant effect with increased fracture resistance, as stable propagation for specimens with small gaps changes to arrest with unstable propagation for larger gaps.
自动铺丝（AFP）技术曾一度局限于航空航天领域，如今正逐渐获得认可，并在海洋结构领域展现出巨大潜力。本文描述了制造缺陷、间隙和重叠对采用AFP制造的碳/环氧复合材料平面外性能的影响。通过短梁剪切试验测得的表观层间剪切强度不受缺陷存在的影响。然而，这些缺陷确实会影响分层扩展。在I型（拉伸）载荷下，观察到了较小的裂纹止裂效应，导致表观断裂能更高，特别是对于使用垫板制造的试样。在II型（面内剪切）载荷下，影响更为显著，抗断裂能力增强，因为小间隙试样的稳定扩展会转变为大间隙试样的不稳定扩展并止裂。
