Study on Interlaminar Shear and Damage Behavior of Carbon Fiber Composites with Short Fiber Interleaves: 1. The Comparative Test

2008 ◽  
Vol 41-42 ◽  
pp. 335-340 ◽  
Author(s):  
Li Jun Zhao ◽  
Feng Peng Zhang ◽  
Xiao Zhi Hu ◽  
Bao Zong Huang
Keyword(s):  
Carbon Fiber ◽  
Considerable Increase ◽  
Fiber Composites ◽  
Short Fiber ◽  
Carbon Fiber Composites ◽  
Failure Characteristics ◽  
Damage Process ◽  
Interlaminar Shear ◽  
Inversion Analysis ◽  
Shear Compliance

A special test setup was designed and used in compression shear test of unidirectional carbon fiber composites to study the effect of short fiber interleaves (SFIs) on the interlaminar shear behavior. The comparative tests for two kinds of double-notched compression specimens, with and without SFIs, were carried out to determine the interlaminar shear strength and modulus (ILSS and ILSM) and to examine the failure characteristics. To determine ILSM of the specimens with SFIs an inversion analysis method was proposed based on comparing compression displacement of specimens with and without SFIs. The experimental results show that SFIs makes ILSS decreasing due to lower interface strength, and the complex damage process of SFIs leads to a considerable increase of interlaminar shear compliance.

Effects of Epoxy/SiO2 Hybrid Sizing on the Mechanical Properties of Carbon Fiber Composites

2007 ◽  
Vol 121-123 ◽  
pp. 1253-1256 ◽  
Author(s):  
Chun Hong Zhang ◽  
Z.Q. Zhang ◽  
H.L. Cao
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Sol Gel ◽  
Fiber Surface ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Impact Properties ◽  
Ft Ir ◽  
Gel Technique ◽  
Interlaminar Shear

A novel epoxy/SiO2 hybrid sizing for carbon fiber surface was prepared through sol-gel technique, the structure of the sizing were analyzed, and the effects of the sizing on mechanical properties of carbon fiber composites were also investigated. The analyses by FT-IR and SEM indicated that epoxy/SiO2 hybrid sizing was prepared successfully, SiO2 particles dispersed in the hybrid sizing film homogeneously with nanoscale. The analyses on interlaminar shear strength (ILSS) and impact properties of composites showed that the epoxy/nano-SiO2 hybrid sizing increased ILSS and improved impact properties obviously at the same time.

Damping Properties of Vapor-Grown Carbon Fiber Composites

2000 ◽  
Author(s):  
Ioana C. Finegan ◽  
Gary G. Tibbetts ◽  
Ronald F. Gibson
Keyword(s):  
Carbon Fiber ◽  
Dynamic Properties ◽  
Fiber Composites ◽  
Dynamic Mechanical Properties ◽  
Short Fiber ◽  
Thermoplastic Composites ◽  
Carbon Fiber Composites ◽  
Fiber Aspect Ratio ◽  
Aspect Ratios ◽  
Injection Molded

Abstract The objective of this paper is to investigate analytically and experimentally the dynamic mechanical properties of vapor grown carbon fiber (VGCF)/thermoplastic composites. The experimental results show that, as predicted, very low fiber aspect ratios may produce significant improvements in damping. Since VGCF have submicron diameters and lengths, with a fiber aspect ratio, l/d = 19, good dynamic properties are obtained by using them as reinforcement in a thermoplastic. Fiber length distributions and orientation in the injection molded samples are determined by scanning electron microscopy (SEM). An analytical model based on the elastic-viscoelastic correspondence principle is developed to predict elastic properties in short fiber composites having a preferential fiber orientation in the direction of injection. The mechanical damping and storage modulus are analyzed experimentally by using a Dynamic Mechanic Analyzer (DMA).

Sign in / Sign up

Export Citation Format

Share Document