Interlaminar fracture morphology of carbon fibre/PEEK composites
Interlaminar fracture morphology of carbon fibre/PEEK composites
复制标题
碳纤维/PEEK复合材料层间断裂形貌
DOI：
--
复制
发表时间：
1987
期刊：
影响因子：
--
通讯作者：
D. R. Moore
中科院分区：
文献类型：
--
作者：
R. Crick;D. Leach;P. Meakin;D. R. Moore
研究了碳纤维/聚醚醚酮复合材料（芳香族聚合物复合材料，APC-2）的层间断裂形态。使用的技术包括断裂表面以及抛光和蚀刻部分的扫描电子显微镜。观察到两种类型的层间断裂：稳定断裂和不稳定断裂。两个断裂面均表现出微延展性，但对于稳定断裂而言，其范围更广。断裂面不是平坦的，而是具有表面粗糙度。还可以观察纤维断裂和剥离，并且定量检查可以计算不同过程的断裂能贡献。蚀刻技术的使用揭示了球晶结构和变形区的存在，该变形区从断裂表面延伸到复合材料的主体中。该区域的范围在稳定断裂区域中比在不稳定区域中更大，并且它的存在表明可以进入能量吸收过程的复合材料的体积远远超出层间区域。还使用断裂能贡献计算了区域的尺寸，并且计算的区域尺寸和观察到的区域尺寸之间存在适度的一致性。断裂表面上的微延展性模式被认为是由球晶结构引起的，但是球晶边界不影响断裂路径。
The interlaminar fracture morphology of a carbon fibre/poly(ether-ether-ketone) composite (Aromatic Polymer Composite, APC-2) has been examined. The techniques used included scanning electron microscopy on fracture surfaces and on polished and etched sections. Two types of interlaminar fracture are observed: stable and unstable fracture. Both fracture surfaces exhibit microductility but it is more extensive for stable fracture. The fracture surfaces are not planar but have surface roughness. Fibre breakage and peeling are also observed and a quantitative examination enables the fracture energy contributions from the various processes to be calculated. The use of an etching technique reveals the spherulite texture and the presence of a deformation zone which extends into the bulk of the composite from the fracture surface. The extent of this zone is greater in the stable fracture region than in the unstable region and its presence indicates that the volume of composite which can be brought into the energy absorbing process extends well beyond the interlaminar region. The size of the zone has also been calculated using the fracture energy contributions and there is moderate agreement between calculated and observed zone size. Patterns of microductility on the fracture surface are seen to be due to spherulite texture, however the spherulite boundaries do not influence the fracture path.