Delamination of tapered composite structures
Delamination of tapered composite structures
复制标题
锥形复合材料结构的分层
DOI：
10.1016/0013-7944(89)90241-5
复制
发表时间：
1989
影响因子：
5.4
通讯作者：
S. Lee
中科院分区：
文献类型：
--
作者：
J. Fish;S. Lee
研究了具有多个内部铺层台阶的锥形复合材料层合板的脱层问题。玻璃-环氧试样的实验测试和锥形区域的有限元建模进行。平均应力概念适用于三维有限元模型的面外应力。分层失效标准，然后用于预测强度的基础上层失败和层间树脂失败。强度预测的基础上层间树脂失效，使用应力平均距离的一个层厚度被发现与实验结果。锥形层压板中的分层是由于最后一个铺层下降步骤周围的层间树脂的层间剪切破坏。
The delamination of tapered composite laminates with multiple internal ply drop steps is investigated. Both experimental testing of glass-epoxy coupon specimens and finite element modeling of the tapered region are conducted. The average stress concept is applied to out-of-plane stresses from a three-dimensional finite element model. Delamination failure criteria are then used to predict strength based on ply failure and interply resin failure. Strength predictions based on interply resin failure using a stress averaging distance of one ply thickness are found to correlate well with the experimental results. Delamination in the tapered laminates is due to interlaminar shear failure of the interply resin surrounding the last ply drop step.