Analysis of the Single-Fiber Fragmentation Test.
Analysis of the Single-Fiber Fragmentation Test.
(675 K)
Lee, S.; Nguyen, T.; Chin, J. W.; Chuang, T. J.
Journal of Materials Science, Vol. 33, 1-8, 1998.
Keywords:
composite materials; fiber reinforced composite
Abstract:
An analysis of the single-fiber fragmentation test was
investigated. An approximate solution for the stress
fields of a fiber embedded in a polymer matrix of
different elastic moduli was obtained by the Eshelby
method. The fiber was modeled as a prolate spheroid.
The axial stress of the fiber increases with increasing
aspect ratio and fiber-matrix shear modulus ratio and
decreases with increasing matrix and fiber Poisson's
ratios. Using this analysis, the fracture stress of a
single-fiber fragmentation specimen was derived. The
applied stress at fiber fracture decreases monotonically
with increasing aspect ratio of the fragmented fiber and
increases with increasing fiber and matrix Poisson's
ratios. This model is in qualitative agreement with
published experimental data.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899