Ceramic stereolithography or vat photopolymerization is a process allowing the fabrication of ceramic objects with highly complex shapes. Lattices structures are particularly used together with advanced optimization topology tools for the design of printable lightweight shapes with optimized mechanical resistance. If the mechanical resistance of these lattices structures is well controlled at the polymeric state, they can be severely deformed at high temperatures during the sintering stage. The deformation sensitivity of the lattices structures during the sintering should then be determined to include this aspect at the conception stage. The finite element (FEM) simulation of lattices sintering is an interesting solution to anticipate numerically the deformation sensitivity of the lattices and determine their minimum wall thickness. This requires to determine the sintering behavior of the printed green specimens and to take into account the sintering anisotropy, which involves weaker resistance between the layers. In this study the sintering behavior is first determined by multiple-axis dilatometry, modeled analytically and then simulated by the FEM method. Afterward, the sintering simulation of lattices with different wall thicknesses is conducted. This allows testing the simulation tool predictability for each lattices wall thickness and to compare their deformation sensitivity at high temperatures.

陶瓷立体光刻或大桶光聚合是一种允许制造具有高度复杂形状的陶瓷物体的工艺。晶格结构特别与先进的优化拓扑工具一起使用，用于设计具有优化机械阻力的可打印轻质形状。如果这些晶格结构的机械阻力在聚合状态下得到很好的控制，它们可能会在烧结阶段的高温下严重变形。然后应确定晶格结构在烧结过程中的变形敏感性，以在概念阶段包括这一方面。晶格烧结的有限元 (FEM) 模拟是一种有趣的解决方案，可以从数值上预测晶格的变形敏感性并确定它们的最小壁厚。这需要确定印刷绿色样品的烧结行为，并考虑烧结各向异性，这涉及层间较弱的电阻。在本研究中，首先通过多轴膨胀仪确定烧结行为，对其进行分析建模，然后通过 FEM 方法进行模拟。之后，进行了不同壁厚晶格的烧结模拟。这允许测试模拟工具对每个格子壁厚的可预测性，并比较它们在高温下的变形敏感性。分析建模，然后通过 FEM 方法进行模拟。之后，进行了不同壁厚晶格的烧结模拟。这允许测试模拟工具对每个格子壁厚的可预测性，并比较它们在高温下的变形敏感性。分析建模，然后通过 FEM 方法进行模拟。之后，进行了不同壁厚晶格的烧结模拟。这允许测试模拟工具对每个格子壁厚的可预测性，并比较它们在高温下的变形敏感性。