Uniaxial strength of a composite array of overlaid and aligned prepreg platelets

The tensile strength of a discontinuous composite system consisting of aligned, unidirectional prepreg platelets is predicted by performing progressive damage analyses in a periodic representative volume element. Interlaminar and in-plane damage mechanisms are combined to yield failure characteristi...

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Bibliographic Details
Published inComposites. Part A, Applied science and manufacturing Vol. 109; pp. 31 - 47
Main Authors Kravchenko, Sergii G., Sommer, Drew E., Pipes, R. Byron
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.06.2018
Subjects
A. Discontinuous reinforcement
B. Strength
C. Cohesive interface modeling
C. Damage mechanics
Platelet
A. Discontinuous reinforcement
B. Strength
Platelet
C. Damage mechanics
C. Cohesive interface modeling
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Summary:The tensile strength of a discontinuous composite system consisting of aligned, unidirectional prepreg platelets is predicted by performing progressive damage analyses in a periodic representative volume element. Interlaminar and in-plane damage mechanisms are combined to yield failure characteristics of the meso-structure. The length-to-thickness ratio of the platelet was found to be the primary variable for control of system strength and failure mode. A critical platelet aspect ratio was determined as that ratio wherein system strength is maximized. Further, composite strength variability was shown to be vary inversely with aspect ratio, while attaining a minimum at the critical aspect ratio.
ISSN:1359-835X
1878-5840
DOI:10.1016/j.compositesa.2018.02.032