Composite sandwich structures are widely used in many fields. T-joint plays a significant role in the composite sandwich structural connection. In this paper, a type of adhesive T-joint was manufactured and tested under bending and shearing load. According to the experiment, the finite element model was established to reveal the failure process. A strength prediction model was proposed based on the simulation. The results showed that the T-joint’s lower connector and the web’s lower face panel controlled its maximum load-bearing capacity, and the failure mode is the fiber compressive damage. The predicted ultimate bearing capacity of the T-joint showed a good agreement with the simulation, and the maximum relative error was less than 3%.

中文翻译：

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复合夹层结构T型接头破坏机理及强度预测模型

复合夹层结构被广泛应用于许多领域。T型接头在复合夹层结构连接中起着重要作用。在本文中，制造了一种粘性 T 型接头，并在弯曲和剪切载荷下进行了测试。根据试验建立有限元模型，揭示失效过程。在此基础上提出了强度预测模型。结果表明，T型接头下连接件和腹板下面板控制了其最大承载能力，失效模式为纤维压缩损伤。T型接头的预测极限承载力与模拟吻合较好，最大相对误差小于3%。