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Orientation-dispersed pseudo-ductile hybrid composite laminates – A new lay-up concept to avoid free-edge delamination

机译:方向分散的伪延性混合复合层压板–一种避免自由边缘分层的新铺放概念

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摘要

Multi-Directional hybrid composites can suffer from free-edge delamination, a damage mode that doesn't exist in Uni-Directional hybrid composites and can hinder the pseudo-ductility that can be achieved with thin-ply hybrids. This paper presents a new lay-up concept called ‘orientation-dispersed’ laminates to avoid this mode of damage in quasi-isotropic hybrids. It is shown that the energy release rates at the free-edges of orientation-dispersed layups are significantly lower than those in ‘orientation-blocked’ laminates. Finally, the experimental results from two quasi-isotropic layups with π/3 and π/4 intervals are presented showing a good pseudo-ductility with no free-edge delamination.
机译:多向混合复合材料可能会遭受自由边缘分层的困扰,这是单向混合复合材料中不存在的损坏模式,并且可能会阻碍薄层混合材料实现的拟延展性。本文提出了一种新的铺叠概念,称为“定向分散”层压板,以避免在准各向同性混合动力汽车中出现这种损坏模式。结果表明,定向分散叠层的自由边缘处的能量释放速率明显低于“定向受阻”层压板的能量释放速率。最后,给出了来自两个具有π/ 3和π/ 4间隔的准各向同性叠层的实验结果,显示了良好的伪延展性,没有自由边缘分层。

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