Surface modification of titanium-based carbon-fibre/epoxy laminates (Ti-CF FMLs) is a challenging topic due to its multilayer structure. This paper investigates the delamination behavior of the Ti-CF FMLs under laser shock peening (LSP) based on experimental and numerical methods. The results show that the onset of the delamination of the Ti-CF FMLs depends on LSP treated area and the delamination width along the thickness direction increases with LSP area. The direct effect of LSP is to degrade the scalar stiffness of the interface between metal and CFRP layers in the Ti-CF FMLs instead of inducing delamination. As massive LSP are performed, the compressive residual stress produces reverse bending, thus delamination occurs at the damaged interface. The damage of the adhesive layer can be effectively prevented by reducing the laser spot size.

由于其多层结构，钛基碳纤维/环氧树脂层压板 (Ti-CF FML) 的表面改性是一个具有挑战性的课题。本文基于实验和数值方法研究了激光冲击强化 (LSP) 下 Ti-CF FML 的分层行为。结果表明，Ti-CF FMLs 分层的开始取决于 LSP 处理的面积，并且沿厚度方向的分层宽度随着 LSP 面积的增加而增加。LSP 的直接影响是降低 Ti-CF FML 中金属和 CFRP 层之间界面的标量刚度，而不是引起分层。随着大量LSP的进行，残余压应力产生反向弯曲，从而在损坏的界面处发生分层。通过减小激光光斑尺寸可以有效防止胶层的损坏。