The inconsistent interfacial bonding of 3D-printed materials is accompanied by increasing scattering of the measured fracture toughness in delamination tests. This article focuses on the analysis of the delamination tests using theories developed for conventional composites. To this end, nylon 3D-printed specimens reinforced with carbon fibers are subjected to the mode I Double Cantilever Beam (DCB) and the mode II End-Loaded Split (ELS) tests. Several analytical methods and numerical models are employed to measure the fracture toughness and simulate the behavior of the specimen during delamination. The uncertainty of the data is considered by expanding the deterministic character of the models utilizing the non-intrusive stochastic pseudo-spectral projection method. The results of the simulations are well in agreement with the experimental results and support the use of stochastic techniques in combination with linear fracture mechanics for the delamination analysis of 3D-printed composites.

3D 打印材料的不一致界面结合伴随着分层测试中测量的断裂韧性的散射增加。本文重点使用为传统复合材料开发的理论分析分层测试。为此，用碳纤维增强的尼龙 3D 打印试样接受了模式 I 双悬臂梁 (DCB) 和模式 II 端部加载拆分 (ELS) 测试。几种分析方法和数值模型被用来测量断裂韧性并模拟样品在分层过程中的行为。通过利用非侵入性随机伪谱投影方法扩展模型的确定性特征来考虑数据的不确定性。