A Survey of Current High-Performance Carbon Fiber Characterization Methods

Nguyen, Steven P.; Ghiorse, Linda L.; Mulkern, Thomas J.

doi:10.21236/ada381889

Cited by 2 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presence of sizing was not accounted for in the area calculation. Test procedures were guided by ASTM D4018-93, "Test Methods for Properties of Continuous Filament Carbon and Graphite Tows," and procedures used by the Army Research Laboratories [6]. …”

Section: Tow Strand Datamentioning

confidence: 99%

Hydroburst Test Methodology for Evaluation of Composite Structures

Thompson

Pak

Rech

2003

Composite Materials: Testing and Design, Fourteenth Volume

View full text Add to dashboard Cite

The University of Texas at Austin Center for Electromechanics (UT-CEM) is under contract to develop high-speed composite flywheel systems for a number of energy and power averaging applications in the transportation and space industries. Safe and reliable design of composite flywheels requires well-characterized material properties. Efforts have been focused on design optimization of a hydroburst test technique that demonstrates a useful method for characterizing the hoop (circumferential) properties of filament wound composite rings, and those results are then available to predict the performance of full-scale flywheels. To demonstrate the usefulness of this method, this paper discusses typical hydroburst techniques to determine material properties for filament-wound composite rings. Test results are also presented. Seal design is a key element of this fixture, and a design has evolved that provides nearly uniform radial loading on the inside surface of the composite ring, while minimizing axial bending. Correlations of tow strand data with hydroburst lamina data are presented. Also discussed are hydroburst test applications for flaw assessment and fatigue property evaluation.

show abstract

Section: Tow Strand Datamentioning

confidence: 99%

Hydroburst Test Methodology for Evaluation of Composite Structures

Thompson

Pak

Rech

2003

Composite Materials: Testing and Design, Fourteenth Volume

View full text Add to dashboard Cite

show abstract

Analyzing the effect of misalignment on single-filament carbon fiber tensile testing via stereoscopic computer vision imaging

Love-Baker

Harrell

Brown

et al. 2021

Meas. Sci. Technol.

View full text Add to dashboard Cite

An understanding of the constitutive properties of carbon fibers (CFs) is critical to the accuracy of high-resolution composite simulations and to the development of CF derived from low-cost alternative precursor materials. Single-fiber tensile testing is a capable tool to measure CF properties and is well suited to research efforts where only a small number of fibers may be available. However, single-fiber tensile tests are challenging to conduct due to the difficulty in handling small diameter fibers (5–15 μm), the brittleness of single fibers, and the required nanoscale/microscale resolution of testing equipment. The accuracy of the measured properties depends on several factors, but a critical factor is fiber misalignment, especially at short gauge lengths. Current standards do not address the effect of tensile specimen misalignment on measured properties. This work presents a robust method of fiber alignment using stereoscopic computer vision that enables users to align fibers vertically for tensile testing to improve the accuracy of resulting mechanical properties. Additionally, an analytical relationship between fiber misalignment angle and measured properties is developed and validated against the experimental results. As a result, new best practices for single-fiber tensile testing of CF are recommended.

show abstract

A Survey of Current High-Performance Carbon Fiber Characterization Methods

Cited by 2 publications

References 11 publications

Hydroburst Test Methodology for Evaluation of Composite Structures

Hydroburst Test Methodology for Evaluation of Composite Structures

Analyzing the effect of misalignment on single-filament carbon fiber tensile testing via stereoscopic computer vision imaging

Contact Info

Product

Resources

About