The dependence of the strength of carbon fibres on length

Hitchon, J.W.; Phillips, D. C.

doi:10.1016/0015-0568(79)90032-0

Cited by 87 publications

(34 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Brittle fibers such as carbon and glass exhibit a strength size effect due to flaws in the microstructure of the fibers; tensile strength increases with reduced fiber diameter and gauge length, respectively. 10,11) Fabric architecture is also important to discuss mechanical properties of the composites. The multi-dimensional weave can easily create pockets where voids can be trapped or cracks can initiate.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Tensile Properties of SiC/SiC Composites with Miniaturized Specimens

Nozawa

Katoh

2005

Mater. Trans.

View full text Add to dashboard Cite

Mechanical testing after neutron irradiation is a critical research tool for evaluating materials for fusion systems, such as silicon carbide fiber silicon carbide matrix (SiC/SiC) composites. However, single-axis tensile testing, which is required to build a fundamental database, requires large specimens. Therefore miniaturization of tensile test specimens has long been pursued as a method to reduce the irradiation volume to fit the capsule size limitation. The objective of this study is to identify specimen size effects on tensile properties of SiC/SiC composites from the viewpoints of the influences of fabric architecture and tensile loading axis, with a final goal to establish a small specimen test technique for tensile testing of the composites. The axial fiber volume fraction plays an important role in achieving good tensile properties. However the size dependent change of the axial fiber volume fraction gives specimen size effect. The composites with much fiber volume content tended to have superior tensile strength, elastic modulus and proportional limit stress. Contrarily, the tensile properties of the composites with the same axial fiber volume fraction were almost independent of the specimen size. This type of size effect is generally common in any types of architecture. The size-relevant fracture mode in off-axis tension: detachment in shorter widths vs. in-plane shear at larger widths, also gives specimen size effect on tensile properties, resulting in strict limitation of miniaturization of the tensile specimen. Finally we proposed a miniature tensile specimen for the composites.

show abstract

Section: Introductionmentioning

confidence: 99%

“…[5][6][7][8][9][10][11][12][13][14][15][16] Specifically the recent attention is paid on the following factors: (1) inside sub-micron flaws, (2) microstructure, (3) stress gradient and (4) test considerations. This technique cannot be established understanding of the influence of theses factors.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Tensile Properties of SiC/SiC Composites with Miniaturized Specimens

Nozawa

Katoh

2005

Mater. Trans.

View full text Add to dashboard Cite

show abstract

“…To achieve good extrapolation results, fiber tensile tests should be performed at many different gage lengths (at least seven), and there should be a sample size of about 20 for each gage length (Asloun et al 1989). The validity of this method was confirmed in previously published data (Manders and Chou 1983;Goggin 1975;Barry 1978;Hitchon and Phillips 1979;Jones et al 1980 overestimated since only the strong fibers are extracted for tensile tests. Weak fibers break prior to testing and are discarded during sample preparation.…”

Section: Statistical Tensile Strengthmentioning

confidence: 98%

A Survey of Current High-Performance Carbon Fiber Characterization Methods

Nguyen¹,

Ghiorse²,

Mulkern³

2000

View full text Add to dashboard Cite

This report reviews various test techniques published in the literature for evaluating carbon fiber via the single-filament tensile test, the dry bundle test, the resin-impregnated strand test, and the single-fiber fragmentation test (optical microscopy and acoustic emission). Experimental procedures, data analysis, and statistical tensile strength theory are also described. Each technique is followed by a discussion of the advantages and limitations. Furthermore, a materials property database has been developed that includes mechanical properties for several commercially available carbon fibers.n Acknowledgments

show abstract

“…23,25 The difference in shape parameters reflects the flaw distribution in the material. In case of a homogeneous flaw distribution throughout the material the shape parameter will have high values.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Mechanical characterization and application of Weibull statistics to the strength of softwood lignin‐based carbon fibers

Nordström¹,

Joffe

Sjöholm³

2013

J of Applied Polymer Sci

View full text Add to dashboard Cite

Mechanical characterization of the first generation of softwood kraft lignin-based carbon fibers (CF) was carried out. The single-fiber tensile tests of filaments with different diameters and length were performed to evaluate stiffness and strength of carbon fibers. The average mechanical properties were measured as follows: tensile strength of approximately 300 MPa, the elastic modulus of 30 GPa and a strain at failure within interval of 0.7-1.2%. The fiber strength data was evaluated by the two-parameter Weibull statistics and parameters of this distribution were obtained. Although strength of the produced fibers is still significantly lower than that of commercially available, the experimental results and predictions based on Weibull statistics show a fairly good fit.

show abstract

The dependence of the strength of carbon fibres on length

Cited by 87 publications

References 2 publications

Evaluation of Tensile Properties of SiC/SiC Composites with Miniaturized Specimens

Evaluation of Tensile Properties of SiC/SiC Composites with Miniaturized Specimens

A Survey of Current High-Performance Carbon Fiber Characterization Methods

Mechanical characterization and application of Weibull statistics to the strength of softwood lignin‐based carbon fibers

Contact Info

Product

Resources

About