摘要
复合材料因其弯扭耦合效应、自适应等特性常被作为智能材料应用于水下结构以提升其性能。采用CFD/FEM流固耦合数值方法,以水下翼板为例,研究了复合材料铺层角度对其宏观力学性能的影响规律,揭示了材料的弯扭耦合效应以及减阻特性与铺层角度间的内在联系。结果表明,小攻角下,铺层角对复合材料翼板力学性能较小;大攻角下,材料铺层角度对其弯扭耦合效应影响明显,且合适的铺层角度能有效的减少翼板阻力;材料铺层角度方向与应力集中区呈一致性。
Composite materials, such as CFRP, are used as smart materials in underwater structures for its bend-twist coupling properties. In this paper, the CFD/FEM coupling fluid-structure method was used to investigate relationship between the ply orientation and the bend-twist coupling and the drag reduction properties. The results show that influence of ply orientation on the composite wing mechanical properties was negligible with small attack angle and significant with large attack angle. Appropriate ply orientation could effectively reduce drag force. The stress concentration area was consistent with ply orientation direction.
引文
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