Continuum damage mechanics (CDM) based on finite element analysis was performed to predict the mechanical behavior of a 3D-printed curvilinear continuous carbon fiber reinforced thermoplastic (c-CFRTP). Elastoplastic properties of the 3D-printed c-CFRTP including damage initiation, evolution, and propagation were identified using monotonic and cyclic tensile tests for three specimens, i.e. [(±45)2]S, [(0/90)2]S, and [(±67.5)2]S. Then, S-shaped curvilinear c-CFRTP was 3D-printed and tested in monotonic tensile loading. The non-linear mechanical behavior of an S-shaped curvilinear c-CFRTP due to tensile loading was well predicted by means of finite element analysis using the constructed CDM-based material model.

中文翻译：

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基于连续损伤力学的 3D 打印曲线连续碳纤维增强热塑性塑料的渐进损伤模拟

执行基于有限元分析的连续损伤力学 (CDM) 以预测 3D 打印曲线连续碳纤维增强热塑性塑料 (c-CFRTP) 的机械性能。3D 打印 c-CFRTP 的弹塑性特性，包括损伤起始、演化和扩展，使用三个试样的单调和循环拉伸试验确定，即 [(±45)2]S、[(0/90)2]S、和 [(±67.5)2]S。然后，S 形曲线 c-CFRTP 被 3D 打印并在单调拉伸载荷下进行测试。通过使用构建的基于 CDM 的材料模型的有限元分析，可以很好地预测由拉伸载荷引起的 S 形曲线 c-CFRTP 的非线性力学行为。