Additive manufacturing of ceramics gains increasing attention in recent years, as ceramic material like clay processes distinctive merits, including hardness, thermal and chemical stability, etc. The customer-level extrusion-based ceramics 3D printer is getting easily achievable. However, due to its semi-liquid and highly viscoelastic properties, the clay material causes new challenges to the computational aspects. It does not dry instantly and may collapse during the accumulated force from new layers breaks the moment equilibrium, especially when adjacent layers have less overlap region. We tackle this unique problem, focusing on shell-like models in extrusion-based ceramics printing in this paper. We propose a structural analysis algorithm that considers the moment equilibrium for each layer along the fabrication process. We also present a computational framework to enhance the structural stability by local thickening of the shell models without affecting the appearance. We demonstrate the printing process and physical results to validate our method.

近年来，由于粘土等陶瓷材料具有独特的优点，包括硬度，热和化学稳定性等，陶瓷的增材制造越来越受到关注。客户级别的基于挤压的陶瓷3D打印机正易于实现。然而，由于其半液态和高粘弹性，粘土材料对计算方面提出了新的挑战。它不会立即干燥，并且可能在新层的累积力破坏瞬间平衡时崩溃，尤其是当相邻层的重叠区域较少时。我们解决了这个独特的问题，在本文中重点介绍了基于挤压的陶瓷印刷中的壳状模型。我们提出了一种结构分析算法，该算法考虑了整个制造过程中每一层的弯矩平衡。我们还提出了一种计算框架，以通过局部加厚壳模型来增强结构稳定性而不会影响外观。我们演示了印刷过程和物理结果，以验证我们的方法。