Abrasive waterjet technology is favored over solid cutting tools for cutting of multi-layered structures in view of its non-contact nature and its ability to cut a wide range of materials. However, the stochastic nature of abrasive water jet (AWJ) interacting with a multi-layered structure (MLS) produces a non-uniform kerf geometry. This non-uniformity depends on the characteristics of jet i.e. jet energy, the duration of interaction of jet with the material, and the nature of material exposed to the jet during cutting. This paper attempts to cover a study that systematically analyses the geometry of kerf generated in MLS and a stack of multiple materials with each material having different mechanical properties. It also covers a study to analyse the role of interfacial adhesive layer on kerf profile variation, and the preferential orientation of multi-layered structure and stacked materials, with its top layer, having an appropriate mechanical resistance (MR), in order to arrive at a strategy to present the structure or a stack of materials to AWJs for producing near uniform kerf profile. Hence, AWJ cutting experiments were carried out over a single- and double- layered structures (SLSs, DLSs) with two different materials such as aluminum (Al), mild steel (MS), which showed a completely different kerf geometry when these materials are stacked in different ways. Stacking of these materials in different ways produced kerf of different geometry not only in the materials but also at their interface. This systematic study enabled to suggest the correct presentation of MLS and also a stack of multiple materials with a suitable material in top layer, to AWJ, for producing near uniform kerf in them. Further, this study also suggested several hypotheses like the importance of relative MR of adjoining layers, critical jet traverse rate, pseudo focusing nozzle, and the choice of layer placement in producing near uniform kerf on MLS and a stack of materials, so as to minimize the efforts in post machining of AWJ cut surfaces. Finally, the relevance of the proposed hypotheses was validated by analyzing the kerf formed over MS-rubber-MS and rubber-MS-rubber configured three-layered structure.

鉴于其非接触性和切割多种材料的能力，磨料水刀技术优于用于切割多层结构的整体切削工具。但是，磨料水射流（AWJ）与多层结构（MLS）相互作用的随机特性会产生不均匀的切缝几何形状。这种不均匀性取决于射流的特性，即射流能量，射流与材料的相互作用持续时间以及切割过程中暴露于射流的材料的性质。本文试图涵盖一项研究，该研究系统地分析MLS中产生的切缝的几何形状以及多种材料的堆叠，每种材料具有不同的机械性能。它还涵盖了一项研究，以分析界面粘合层对切口轮廓变化的作用，以及多层结构和堆叠材料的优先方向，其顶层具有适当的机械阻力（MR），以便制定出一种策略，向AWJ展示该结构或材料堆叠，以产生接近均匀的切口个人资料。因此，AWJ切割实验是在具有两种不同材料（例如铝（Al），低碳钢（MS））的单层和双层结构（SLSs，DLSs）上进行的，当这些材料是以不同的方式堆叠。这些材料以不同的方式堆叠不仅在材料中而且在它们的界面处产生了不同几何形状的切缝。通过这项系统的研究，我们可以向AWJ建议正确呈现MLS的方法，并建议在顶层使用适当材料的多种材料的堆叠，用于在其中产生接近均匀的切口。此外，这项研究还提出了一些假设，例如相邻层的相对MR，临界喷射速度，伪聚焦喷嘴以及在MLS和一堆材料上产生接近均匀的切缝时选择层的位置，以最大程度地减少AWJ切割表面的后加工工作。最后，通过分析MS-橡胶-MS和橡胶-MS-橡胶配置的三层结构上形成的切口，验证了所提出假设的相关性。