A new numerical method for the mechanical analysis of chopped carbon fiber tape-reinforced thermoplastics
A new numerical method for the mechanical analysis of chopped carbon fiber tape-reinforced thermoplastics
复制标题
DOI：
10.1016/j.compstruct.2018.06.110
复制
发表时间：
2018-10
影响因子：
6.3
通讯作者：
P. Qu;Y. Wan;Chunjiang Bao;Qun Sun;Guangqiang Fang;J. Takahashi
中科院分区：
文献类型：
--
作者：
P. Qu;Y. Wan;Chunjiang Bao;Qun Sun;Guangqiang Fang;J. Takahashi
不连续碳纤维增强热塑性塑料（DCFRTP）是用于制造复杂零件的有前途的材料。在预测具有随机定向增强材料的 DCFRTP 的力学性能时，采用均质模型的数值方法的应用受到限制，因为影响力学性能的细观结构参数在宏观数值模型中没有得到充分的体现。在近场动力学（PD）理论的基础上，本研究提出了一种采用异质颗粒模型的新数值方法来进行DCFRTP的力学分析。使用这种数值方法研究了超薄短切碳纤维带增强热塑性塑料 (UT-CTT) 的拉伸性能。讨论了PD层位大小与UT-CTT特征大小之间的关系。分析了模型尺寸对拉伸性能散射的影响，并研究了界面性能对裂纹扩展的影响。 PD 模拟和实验结果之间的比较显示出良好的一致性。
Discontinuous carbon fiber-reinforced thermoplastics (DCFRTP) are promising materials for the fabrication of complex parts. In predicting the mechanical properties of DCFRTP with randomly oriented reinforcement, the application of numerical methods, which employ homogeneous models, is limited because the mesoscopic structural parameters influencing mechanical properties are not adequately represented in the macroscopic numerical model. On the basis of the peridynamic (PD) theory, a new numerical method, which employs a heterogeneous particle model, is proposed in this investigation for the mechanical analysis of DCFRTP. The tensile properties of ultra-thin chopped carbon fiber tape-reinforced thermoplastics (UT-CTT) are investigated using this numerical method. The relationship between PD horizon size and characteristic size of UT-CTT is discussed. The effect of model size on the scattering of the tensile properties is analyzed and the influence of interface properties on crack propagation is investigated. A comparison between PD simulations and experimental results indicated a good agreement.