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Estimation of interfacial shear strength: an application of a new statistical theory for single fiber composite test
Cornell University, Ithaca.
Cornell University, Ithaca.
Luleå tekniska universitet.
1999 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 59, no 13, p. 2037-2046Article in journal (Refereed) Published
Abstract [en]

A simple procedure is proposed for estimating the effect of different sizings on the strength of fiber/matrix interface. This procedure is based on a newly developed statistical theory for single-fiber composite tests. This procedure is used to evaluate the interfacial shear strength of HTA carbon fiber in an epoxy matrix with two different sizings. It is shown that if the experiment data are presented in the form of the normalized variables, and σ/σc, the two sets of data corresponding to the two different sizings can be collapsed into a single curve which can be obtained theoretically. Excellent agreement between experiments and theory is found. An argument is presented for the use of the interfacial shear strength as an engineering parameter to characterize interface adhesion. We also investigate the effect of residual stresses due to thermal-expansion coefficient mismatch between the fiber and the matrix on the interpretation of single-fiber composite tests. We found that the experimentally determined Weibull parameters are very sensitive to the effect of these residual stresses and must be taken into consideration when interpreting single-filament composite tests.

Place, publisher, year, edition, pages
1999. Vol. 59, no 13, p. 2037-2046
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-7908DOI: 10.1016/S0266-3538(99)00064-0ISI: 000082862700010Scopus ID: 2-s2.0-0033213058Local ID: 655593c0-1044-11dc-b9dd-000ea68e967bOAI: oai:DiVA.org:ltu-7908DiVA, id: diva2:980798
Note
Godkänd; 1999; 20070601 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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