U型激光焊接夹层板极限强度试验研究

激光焊接夹层板因具有优越的力学性能以及众多结构优点在舰船防护结构设计中具有广阔的应用前景。本文以U型激光焊接夹层板为研究对象，设计其激光制造工艺流程，加工得到U型激光焊接夹层板试件；开展夹层板极限强度性能试验，通过试验得到了夹层板横向、纵向弯曲时的极限承载力及相应的变形模式；采用ABAQUS软件模拟试验工况，开展数值仿真研究，通过与试验结果进行比较，验证、完善有限元数值仿真分析技术，研究成果可为夹层板船体结构力学性能分析提供技术支撑。

Ultimate strength tests of laser-welded corrugated-U type-core sandwich panels

Laser-welded sandwich panels have wide application prospect in vessel protection due to the excellent mech-anical performance and structural advantages. In this paper, the Laser welding processing technology of laser-welded corrug-ated-U type-core sandwich panels (U-LASCOR) is designed, and the specimens of U-LASCOR are manufactured. The ulti-mate strength tests are carried out and the ultimate strength and deformation modes of the specimens during transverse and longitudinal bending are obtained. Then, the numerical simulations are carried out using the ABAQUS software to compare with the test results to validate and improve the numerical simulation technology. The results show that the numerical simula-tion has high precision and it can provide technical support to analyze the mechanical performance of sandwich panels in the further research.