注射成型制备的碳纤维聚丙烯复合材料蠕变性能

doi:10.19936/j.cnki.2096-8000.20240728.005

摘要/Abstract

摘要： 碳纤维热塑性树脂基复合材料在极端环境及长期服役条件下的蠕变行为会使结构件的形状发生改变,影响其性能稳定性,因此对该种材料蠕变性能的研究是材料设计及应用的关键。本文通过对注射成型制备的碳纤维增强聚丙烯复合材料进行单轴拉伸蠕变试验,研究其蠕变行为,并基于以上试验数据得到该种材料的Burgers模型理论方程,采用Moldex3D模流分析软件模拟注射成型哑铃型试样内部碳纤维的取向和分布情况,将该模拟结果映射到ABAQUS中进行有限元分析。结果发现Burgers模型的拟合曲线与试验曲线吻合程度较高,能够用于更长时间以及更广范围应力水平下该种材料的蠕变行为预测;模流分析结果与实际试样横截面观察结果具有较好的一致性;注射成型过程中碳纤维取向及分布会影响最终成型试样的蠕变行为,采用模流分析与有限元分析相结合的方式能够更好地反映材料的蠕变进程。

关键词: 碳纤维增强热塑性树脂基复合材料, 蠕变, 有限元分析, 注射成型, 回收型碳纤维

Abstract: The creep behavior of carbon fiber reinforced resin matrix composites under extreme environmental and long-term service conditions can change the shape of structural components, posing a challenge to their performance stability. Therefore, the study of the creep performance of this material is the key to material design and application. The creep behavior of injection molded carbon fiber reinforced polypropylene composites was studied and the theoretical equations of the Burgers model for this material were obtained through uniaxial tensile creep test. Moldex3D was used to simulate the orientation and distribution of carbon fibers inside the injection molded samples, and the simulation results were mapped to ABAQUS to perform finite element analysis on the creep process of a three-dimensional model of this material. It is shown that the fitting curves of the Burgers model are in good agreement with the experimental curves, and can be applied to predict the creep behavior of this material at a wider range of timeand stress levels; the results of mold flow analysis are consistent with the cross-sectional observations of the actual samples; the orientation and distribution of carbon fibers during injection molding can affect the creep behavior of the final formed samples. The combination of mold flow analysis and finite element analysis can better reflect the creep process of the material.

Key words: carbon fiber reinforced resin matrix composites, creep, finite element analysis, injection molding, recycled carbon fiber

中图分类号:

TB332

高佳艺, 杨扬, 阳玉球. 注射成型制备的碳纤维聚丙烯复合材料蠕变性能[J]. 复合材料科学与工程, 2024, 0(7): 39-44.

GAO Jiayi, YANG Yang, YANG Yuqiu. Creep properties of injection molded carbon fiber reinforced polypropylene composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(7): 39-44.

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