Stiffness prediction for injection molded fiber reinforced thermoplastics composite

被引：0
|
作者：
Huang D. [1 ]
Zhao X. [1 ]
机构：
[1] College of Mechanical and Electrical Engineering, Central South University, Changsha
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 07期
关键词：
Fiber length distribution (FLD); Fiber orientation distribution (FOD); Fiber reinforced thermoplastics (FRT) composite; Laminate analogy approach (LAA); Micromechanics; Stiffness prediction;
D O I：
10.13801/j.cnki.fhclxb.20200811.001
中图分类号：
学科分类号：
摘要：
Based on the stress distribution in representative volume element (RVE) for Hsueh model, the explicit expression of Poisson's ratio ν 12, which can be reduced to the Halpin-Tsai model, was derived from average approximation method, and it basically coincides with the Bridging model. The modified Halpin-Tsai model for transverse modulus E 22 was developed by introducing an exponential decay function of l / a related to the Fu and Giner models, and coincides with the self-consistent model. Based on the assumption of Poisson's ratio properties, the deduced results better than the Halpin-Tsai model are close to the finite element results for Poisson's ratio ν 23, and then the underestimation of shear modulus G 23 was corrected by the modified Halpin-Tsai model for ν 23 based on reverse engineering. Based on the laminate analogy approach (LAA) in conjunction with fiber length distribution (FLD) and generalized fiber orientation distribution (FOD) functions, the elastic moduli for two kinds of injection molded short glass fiber reinforced thermoplastics (FRT) composite were predicted. The results show that the four combined micromechanical models all predict the elastic moduli of the composites well, but the prediction results of weight distribution of fiber lengths are more reasonable than that of number distribution of fiber lengths, especially more than 5% in the improvement effect of longitudinal Young's modulus E L. © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：2196 / 2206
页数：10
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