Composite Research Center, R & D E (E), Dighi, Pune 411 015, India.
Ultrasonics. 2011 Jul;51(5):586-95. doi: 10.1016/j.ultras.2010.12.014. Epub 2010 Dec 31.
In the present work, the interaction of the fundamental anti-symmetric guided Lamb mode (A(o)) with a structural discontinuity in a composite structure was studied through Finite Element numerical simulations and experiments. The structural component selected for this study was a T-joint section made from glass/epoxy material. This co-cured composite structure is made-up of an upper shell (skin) and a spar as the sub-components. It was observed that when A(o) mode interacts with the junction (structural discontinuity) of these sub-components, a mode-converted S(o) mode is generated. Experiments were conducted using air-coupled ultrasound to validate the numerical simulations. The back-propagating "Turning modes", which propagate from the thin region to the spar web and vice versa, were also numerically simulated and experimentally verified.
在本工作中，通过有限元数值模拟和实验研究了基本反对称导波 Lamb 模态（A(o)）与复合材料结构中不连续结构的相互作用。选择用于本研究的结构组件是由玻璃/环氧材料制成的 T 型接头。这种共固化复合材料结构由上壳（蒙皮）和作为子组件的翼梁组成。当 A(o)模式与这些子组件的连接（结构不连续）相互作用时，会产生模式转换的 S(o)模式。实验使用空气耦合超声进行，以验证数值模拟。还数值模拟和实验验证了从薄壁区传播到翼梁腹板并反向传播的反向传播“转向模式”。
Zotero 插件