Experimental reexamination of transverse tensile strength for IM7/8552 tape-laminate composites.

Autor: Arndt, Caitlin M, de Carvalho, Nelson V, Czabaj, Michael W
Předmět:
Zdroj: Journal of Composite Materials; Sep2020, Vol. 54 Issue 23, p3297-3312, 16p
Abstrakt: Due to the observed dependence of transverse-tensile strength, Y T , on test geometry and specimen size, there is no consensus regarding a test method that can uniquely measure Y T . This study reexamines the characterization of Y T by comparing results from established flexure tests with results from a new tensile test that exhibits consistent failure in the gage region. Additionally, the effects of surface preparation and direction of transverse fracture are investigated. Results show that Y T is inversely proportional to specimen volume and surface roughness and is insensitive to direction of transverse fracture. The relationship between specimen volume and Y T is adequately captured by Weibull strength-scaling theory, except at the tails of the Y T distributions. However, specimens exhibited microcracking prior to failure, which violates the "weak-link" assumption of the Weibull theory. These findings highlight the challenges of using deterministic Y T values in progressive damage analysis. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index