In this work, laser shock microhydroforming technology was further investigated. This technology employs liquid as the laser-induced shock wave transmission medium to microform a thin-walled LA103Z magnesium–lithium (Mg-Li) alloy foil with six bump features. A finite element model established by Hypermesh/LS-DYNA was used to illustrate the dynamic transmission of the liquid shock wave and the dynamic plastic deformation of the workpiece. The mechanism by which the liquid shock wave interacted with the closed liquid chamber to generate a homogenised shock wavefront was revealed. The dynamic loading form of the liquid shock wave and the characteristics of the microfeatures of the workpiece resulting from this dynamic loading form were also analysed mechanically. A comparison of the effects of liquid type and laser energy in this process showed that using castor oil as the liquid medium at threshold laser energy achieved the best plastic forming effect of the workpiece. Analysis of the thickness distribution of the workpiece revealed that the rupture was concentrated in the shear thinning region at the edge of the bump features caused by the transient large stress when the laser energy exceeded the threshold value.

在这项工作中，进一步研究了激光冲击微液压成形技术。该技术采用液体作为激光诱导冲击波传输介质，将薄壁 LA103Z 镁锂 (Mg-Li) 合金箔微制成具有六个凸点特征。利用Hypermesh/LS-DYNA建立的有限元模型来说明液体冲击波的动态传递和工件的动态塑性变形。揭示了液体冲击波与封闭液室相互作用以产生均匀冲击波前的机制。还对液体冲击波的动态加载形式以及由该动态加载形式引起的工件微观特征的特征进行了力学分析。该过程中液体类型和激光能量的影响比较表明，在阈值激光能量下，使用蓖麻油作为液体介质实现了工件的最佳塑性成形效果。对工件厚度分布的分析表明，当激光能量超过阈值时，由瞬态大应力引起的凸块特征边缘的剪切变薄区域发生断裂。