The rapid expansion of material extrusion additive manufacturing (MEAM) has emphasized the importance of path-planning strategies for enhancing manufacturing efficiency and printing quality. However, current strategies are often deemed inefficient, inadequately adaptive, and mechanically weak. Additionally, existing studies generally overlook interlayer dissimilarity, leading to connected voids. To address these challenges, this paper proposes a novel multi-level hybrid path-planning strategy with an interlayer interleaving property. This approach utilizes a planar geometric processing algorithm that fills a pattern with inward-contour-parallel and zigzag paths, ensuring homogeneity and compactness. Global continuity is achieved through bridging paths based on curve containment, while a partitioning process based on medial-axis extraction minimizes defects between layers. Numerical and experimental results demonstrate that the proposed tool-path exhibits enhanced contour adaptability, integrity, and mechanical performance compared to common tool-paths. The study also analyses how tool-path planning influences the strength, ductility, and failure modes of specimens, providing valuable insights for MEAM and construction of durable and aesthetically pleasing buildings.

中文翻译：

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用于优化材料挤出增材制造性能的层间交错混合路径


材料挤出增材制造 （MEAM） 的快速发展凸显了路径规划策略对于提高制造效率和打印质量的重要性。然而，当前的策略通常被认为效率低下、适应性不足和机械性弱。此外，现有研究通常忽略了层间的差异性，从而导致相连的空隙。为了应对这些挑战，本文提出了一种具有层间交错特性的新型多级混合路径规划策略。这种方法利用平面几何处理算法，用向内轮廓平行和锯齿形路径填充图案，确保均匀性和紧凑性。全局连续性是通过基于曲线包含的桥接路径实现的，而基于内侧轴提取的分区过程则最大限度地减少了层之间的缺陷。数值和实验结果表明，与普通刀具路径相比，所提出的刀具路径表现出增强的轮廓适应性、完整性和机械性能。该研究还分析了工具路径规划如何影响试样的强度、延展性和失效模式，为 MEAM 和建造耐用且美观的建筑提供了有价值的见解。