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首页> 外文期刊>Applied composite materials >Finite Element Simulation of Low Velocity Impact Damage on an Aeronautical Carbon Composite Structure
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Finite Element Simulation of Low Velocity Impact Damage on an Aeronautical Carbon Composite Structure

机译：航空碳复合材料结构低速冲击损伤的有限元模拟

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Low velocity barely visible impact damage (BVID) in laminated carbon composite structures has a major importance for aeronautical industries. This contribution leads with the development of finite element models to simulate the initiation and the propagation of internal damage inside a carbon composite structure due by a low velocity impact. Composite plates made from liquid resin infusion process (LRI) have been subjected to low energy impacts (around 25 J) using a drop weight machine. In the experimental procedure, the internal damage is evaluated using an infrared thermographic camera while the indentation depth of the face is measured by optical measurement technique. In a first time we developed a robust model using homogenised shells based on degenerated tri-dimensional brick elements and in a second time we decided to modelize the whole stacking sequence of homogeneous layers and cohesive interlaminar interfaces in order to compare and validate the obtained results. Both layer and interface damage initiation and propagation models based on the Hashin and the Benzeggagh-Kenane criteria have been used for the numerical simulations. Comparison of numerical results and experiments has shown the accuracy of the proposed models.
机译：叠层碳复合材料结构中的低速几乎看不见的冲击损伤（BVID）对于航空工业具有重要意义。这种贡献导致了有限元模型的发展，以模拟由于低速冲击导致的碳复合结构内部损坏的发生和传播。由液态树脂灌注工艺（LRI）制成的复合板已使用压重机进行了低能量冲击（约25 J）。在实验过程中，使用红外热像仪评估内部损伤，同时通过光学测量技术测量面部的压痕深度。第一次，我们使用基于退化三维砖元素的均质化壳来开发鲁棒模型，而第二次，我们决定对均质层和粘性层间界面的整个堆叠顺序进行建模，以比较和验证所获得的结果。基于Hashin和Benzeggagh-Kenane准则的层和界面损伤引发和传播模型都已用于数值模拟。数值结果与实验结果的比较表明了所提模型的准确性。

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