• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2017, Vol. 53 ›› Issue (24): 126-134.doi: 10.3901/JME.2017.24.126

• 材料科学与工程 • 上一篇    下一篇

注塑成型短玻纤增强复合材料各向异性弹性常数预测方法

丁智平1, 黄达勇1, 荣继刚2, 黄友剑2, 曾家兴1   

  1. 1. 湖南工业大学机械工程学院 株洲 412007;
    2. 株洲时代新材料科技股份有限公司 株洲 412007
  • 收稿日期:2016-11-30 修回日期:2017-06-17 发布日期:2017-12-20
  • 作者简介:丁智平,男,1956年出生,博士,教授,硕士研究生导师。主要研究方向为机械结构强度理论及应用。E-mail:dzp0733@sohu.com
  • 基金资助:
    中央财政创新团队资金资助项目(0420036017)。

Predicting Method of Anisotropic Elastic Constants for Injection Molded Short Glass Fiber Reinforced Composites

DING Zhiping1, HUANG Dayong1, RONG Jigang2, HUANG Youjian2, ZENG Jiaxing1   

  1. 1. School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007;
    2. Zhu Zhou Time New Material Technology Co., Ltd., Zhuzhou 412007
  • Received:2016-11-30 Revised:2017-06-17 Published:2017-12-20

摘要: 针对注塑成型短玻纤增强复合材料,研究二阶纤维取向张量与纤维取向角度之间的连续函数关系,建立纤维均质化RVE模型。基于Taguchi正交试验设计方法,利用DIGIMAT软件对短玻纤增强复合材料RVE模型进行仿真试验,定量分析纤维质量分数(A)、纤维长径比(B)和纤维取向张量(C)对短玻纤增强复合材料力学性能的影响规律。考虑注塑成型过程中的纤维分层效应,提出了夹芯分层模型并进行铺层设计。基于灰箱理论和反求工程,选取纤维长径比、表层厚度比和芯层厚度比、表层纤维取向张量、纤维取向矢量旋转角四个影响因素,反演预测短玻纤增强复合材料PA66(GF50)正交各向异性弹性常数,与材料拉伸弹性模量E33、泊松比u31和泊松比u32的试验结果对比,相对误差分别为0.80%、0.29%和1.35%。

关键词: 弹性常数, 短玻纤, 复合材料, 各向异性, 纤维取向张量, 正交试验

Abstract: By studying a continuous function between the second-order tensor of fiber orientation and fiber orientation angle, fiber homogenized RVE model is established for injection molded short glass fiber reinforced composites. Based on Taguchi orthogonal test design method, the simulation of RVE model of short glass fiber reinforced composites is carried out with DIGIMAT software for quantitative analysis of fiber mass ratio (A), fiber aspect ratio (B) and fiber orientation tensor (C) on the influence of mechanical properties of short glass fiber reinforced composites. Considering injection molding process fiber layered effect, sandwich model is proposed and the lay-up design is carried out. Based on grey box theory and reverse engineering, and selecting fiber aspect ratio, surface/thickness ratio and core/thickness ratio, surface of fiber orientation tensor and fiber orientation vector rotation angle as four influence factors, the inversion to predict the orthotropic elastic constants of short glass fiber reinforced PA66 (GF50) composite are carried out, and in contrast with material tensile testing elastic modulus E33, Poisson's ratio u31 and Poisson's ratio u32, the relative error of 0.80%, 0.29% and 1.35%, respectively.

Key words: anisotropy, composite, elastic constants, fiber orientation tensor, orthogonal test, short glass fiber

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