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Bounds on the natural frequencies of laminated rectangular plates with extension-twisting (and shearing-bending) coupling

机译:拉伸-扭转(和剪切-弯曲)耦合的矩形矩形板固有频率的界线

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摘要

Anti-symmetric angle-ply laminates are widely believed to uniquely possess Extension-Twisting (together with Shearing Bending) coupling behavior. The results in this article serve to dispel this misconception by presenting solutions for both standard laminates, containing combinations of angle plies (+/- 45 degrees) and cross plies (90 degrees and/or 0 degrees), and angle-ply laminates, containing only +/- 45 degrees ply orientations: chosen to reflect current industrial design practice, and also because they serve to produce hygro-thermally curvature-stable properties in some standard laminate configurations, i.e., with immunity to the thermal distortions that generally arise in this class of mechanically coupled laminate as a result of the high temperature curing process.
机译:人们普遍认为,反对称角层板层压板具有独特的延伸扭曲(与剪切弯曲)耦合性能。本文的结果通过提供两种解决方案,消除了这种误解,这些解决方案既提供了标准层压板,也包含了角度层板(+/- 45度)和交叉层板(90度和/或0度)的组合,还提供了包含仅+/- 45度的层定向:选择以反映当前的工业设计实践,并且还因为它们在某些标准层压板配置中用于产生湿热曲率稳定的特性,即,在这种情况下通常不受热变形的影响由于高温固化过程而产生的机械耦合层压板。

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