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Instability of a delaminated composite beam subjected to a concentrated follower force

机译：分层复合梁在集中跟随力作用下的不稳定性

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摘要

Vibration, budding and flutter instability of delaminated composite beams are studied in this paper. An analytical solution is presented for instability of a composite beam with a single delamination subjected to concentrated follower force. Using Euler-Bernoulli beam theory and Classical Lamination Theory, equation of motion of a delaminated beam is derived and solved analytically for free vibration, buckling and flutter instability. After validating the results, effect of delamination location, delamination length and stacking sequence on fundamental frequency, budding load and flutter load are studied. Results show that for a cantilever beam, when delamination moves from surface of the beam to its mid-plane, fundamental frequency and buckling load decreased while flutter load is increased.
机译：本文研究了分层复合梁的振动，出芽和颤振不稳定性。提出了一种解决方案，该解决方案是在集中的随动力作用下，具有单个分层的复合梁的不稳定性。利用Euler-Bernoulli梁理论和经典分层理论，推导了分层梁的运动方程，并针对自由振动，屈曲和颤振不稳定性进行了解析求解。验证结果后，研究了分层位置，分层长度和堆叠顺序对基频，萌芽载荷和颤振载荷的影响。结果表明，对于悬臂梁，当分层从梁的表面移动到其中平面时，基频和屈曲载荷会降低，而颤振载荷会增加。

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