Damage mechanisms of tailored few-layer graphene modified CFRP cross-ply laminates
Damage mechanisms of tailored few-layer graphene modified CFRP cross-ply laminates
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DOI：
10.1016/j.compositesa.2018.12.005
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发表时间：
2019-02-01
影响因子：
8.7
通讯作者：
Fiedler, Bodo
中科院分区：
文献类型：
--
作者：
Leopold, Christian;Just, Gordon;Fiedler, Bodo
提出了一种针对纤维增强聚合物 (FRP) 定制的纳米颗粒改性方法，可以准确分析 0 度或 90 度交叉层压板层中纳米颗粒基体改性对机械性能和损伤机制的影响。 0 度层的修改出乎意料地提高了准静态拉伸强度，尽管主要由纤维性能决定。讨论了积极的止裂效果以及消极影响，例如加速分层生长。纳米颗粒改性树脂体系在提高 FRP 层压板性能方面的适用性对负载情况敏感。对于仅承受拉伸载荷的层压板，修改似乎是有利的，而在弯曲或压缩载荷的情况下，纳米粒子的效果不明确，应小心应用。
A tailored nanoparticle modification approach for fibre reinforced polymers (FRP) is presented that allows exact analysis of the impact of a nanoparticle matrix modification in either 0 degrees- or 90 degrees-layers of cross-ply laminates on the mechanical properties and damage mechanisms. A modification of the 0 degrees-layers unexpectedly increases the quasi-static tensile strength, although dominated by fibre properties. Positive crack stopping effects as well as negative effects, such as accelerated delamination growth, are discussed. The applicability of nanoparticle modified resin systems to improve the performance of FRP-laminates is sensitive to the loading case. For laminates only loaded in tension a modification appears to be advantageous, whereas in case of bending or compression loads the effect of nanoparticles is ambiguous and should be applied carefully.