Suppression of Delamination at Ply Drops in Tapered Composites by Ply Chamfering
Suppression of Delamination at Ply Drops in Tapered Composites by Ply Chamfering
复制标题
通过层倒角抑制锥形复合材料中层滴处的分层
DOI：
10.1177/0021998305053459
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发表时间：
2006
影响因子：
2.9
通讯作者：
M. Wisnom
中科院分区：
文献类型：
--
作者：
B. Khan;K. Potter;M. Wisnom
结构的设计通常通过随着对部件的承载要求的降低而逐渐减小厚度来优化。复合材料中的这种结构是由涉及层片下落的锥形层压板制成的。然而，这些结构通常易于早期分层开始，这导致部件的过早失效，并因此限制其使用寿命。在过去，已经发展了许多途径来规避这个问题，例如使用粘合剂膜层或在连续层之间交错掉落的层。在这项工作中，一种新的技术层边缘倒角已被开发和试样制造中使用。相似配置的标本之间的比较已经绘制，有和没有倒角铺层下降。静态和疲劳试验结果显示出显著的改善，无论是在完全抑制周围的分层铺层下降和实现14.5-77.6%的高强度水平在锥形复合材料试样。实验数据沿着与他们的比较情况。
The design of structures is often optimized by gradually decreasing the thickness as the load carrying requirement on the components decreases. Such structures in composites are made of tapered laminates involving dropping of plies. However, these structures are often prone to early delamination initiation, which leads to premature failure of the component and therefore limits its useful life. In the past, many routes to circumvent this problem have been evolved, such as the use of adhesive film layers or interleaving the dropped plies between continuous ones. In this work, a novel technique of ply edge chamfering has been developed and employed in the specimen fabrication. Comparisons have been drawn between similarly configured specimens, with and without chamfered ply drops. Static and fatigue test results have shown remarkable improvements, both in terms of complete suppression of delamination around ply drops and in realizing 14.5–77.6% higher strength levels in tapered composite test coupons. The experimental data along with their comparative cases are presented.