View Journal Article: E-Glass/DGEBA/m-PDA Model Composites: Time Dependent Failure in a Brittle Multi-Fiber Composite
Citation:
Holmes, G. A. and McDonough, W. G. (2002). E-Glass/DGEBA/m-PDA Model Composites: Time Dependent Failure in a Brittle Multi-Fiber Composite. Society for the Advancement of Material and Process Engineering (SAMPE) 47th International Symposium and Exhibition47 (). 1690-1702.
The fiber-direction properties of a unidirectional laminate are generally considered to be fiberdominated and the elastic modulus may be predicted by the Rule-of-Mixtures approach
using the respective Young’s modulus of the constituents. However, the failure behavior has been qualitatively shown to be dependent on the matrix. For example, Bader in 1968 noted that composites
with brittle matrices and relatively weak fiber-matrix interfacial bonding failed in a brush-like manner, while composites with comparatively strong interfaces failed by propagation of a single
crack across the section, with little or no longitudinal splitting. Although the tensile strength in a unidirectional composite is mainly influenced by the fiber strength and fiber volume fraction,
Bader concluded that the matrix and fiber-matrix interface influences both the strength and failure mode. Research on 2-D multi-fiber model composites has shown that the nucleation of the critical
flaw that induces brittle failure is dependent on the redistribution of stress around the fiber breaks through the viscoelastic matrix. Hence, the nucleation process is time-dependent. In addition,
the inter-fiber spacing has been shown to influence the mode of failure after fiber fracture. The implication of these observations on failure initiation, propagation, and energy absorption in
unidirectional fibrous composites will be discussed.
Publisher
SAMPE
Date
2002-01-01
Copyright Notice
Array
Journal
Society for the Advancement of Material and Process Engineering (SAMPE) 47th International Symposium and Exhibition
Volume
47
Pages
1690-1702
Copyright Agreement
on
Additional Notes
Society for the Advancement of Material and Process Engineering (SAMPE) 47th International Symposium and Exhibition 2002, 47:2/2, 1690-1702.
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View Journal Article: E-Glass/DGEBA/m-PDA Model Composites: Time Dependent Failure in a Brittle Multi-Fiber Composite 