This paper mainly investigates the slamming dynamic response and progressive damage evolution of the composite lattice sandwich structure under different slamming velocities and deadrise angles. Based on the Coupled Eulerian–Lagrangian (CEL) method, an integrated numerical model of sandwich structures is developed to simulate the slamming process, in which the progressive damage evolution of composite material is considered with VUMAT subroutine. The reliability and accuracy of the corresponding numerical models are verified through the comparison between numerical and experimental results. Then, the typical slamming behavior of composite lattice sandwich structure is analyzed in detail, including hydrodynamic force, jet flow/water pressure distribution, progressive damage evolution and absorption energy. Subsequently, the influences of slamming velocity and deadrise angle on the hydrodynamic response and damage modes of the sandwich structures are investigated based on the developed numerical models. The results demonstrate that the slamming velocity and deadrise angle have significant influences on the hydroelastic behavior and damage modes of composite lattice sandwich structures. In the process of slamming, matrix damage and delamination damage are more prone to appear in the chine region, while the fiber damage more likely occurs under the higher slamming velocity and lower deadrise angle cases.

本文主要研究了不同砰击速度和死升角下复合晶格夹层结构的砰击动力响应和渐进损伤演化。基于耦合欧拉-拉格朗日 (CEL) 方法，开发了夹层结构的集成数值模型来模拟砰击过程，其中使用 VUMAT 子程序考虑复合材料的渐进损伤演化。通过数值与实验结果的对比，验证了相应数值模型的可靠性和准确性。然后，详细分析了复合晶格夹层结构的典型砰击行为，包括水动力、射流/水压分布、渐进损伤演化和吸收能量。随后，基于开发的数值模型研究了砰击速度和死角对夹层结构的水动力响应和损伤模式的影响。结果表明，砰击速度和死角对复合晶格夹层结构的水弹性行为和损伤模式有显着影响。在撞击过程中，脊区更容易出现基体损伤和分层损伤，而在较高的撞击速度和较低的死角情况下更容易发生纤维损伤。结果表明，砰击速度和死角对复合晶格夹层结构的水弹性行为和损伤模式有显着影响。在撞击过程中，脊部更容易出现基体损伤和分层损伤，而在较高的撞击速度和较低的死角情况下更容易发生纤维损伤。结果表明，砰击速度和死角对复合晶格夹层结构的水弹性行为和损伤模式有显着影响。在撞击过程中，脊区更容易出现基体损伤和分层损伤，而在较高的撞击速度和较低的死角情况下更容易发生纤维损伤。