Effect Of Post-cure Condition On Interfacial
Properties Of Glass Fiber/vinylester Composites
Author(s)
T. Ota & T. Matsuoka
Abstract
Microdroplet tests were carried out in order to investigate the effect of post-cure
conditions on the interfacial properties of glass fiber/vinylester composites.
Microdroplet test specimens were postcured at 80°C for a period varying from
4h to 24h. The load increased linearly until the maximum pull-out load, where
the load had reached critical load, after which the load reduced rapidly in all the
post-cure conditions. Shear debonding occurred in the fiber/matrix interface at
the maximum pull-out load. The maximum load increased with a longer
embedded length in all the post-cure conditions. In addition, the maximum load
was larger with a longer post-cure time. In the case of PC8h and PC16h,
debonding occurred at a short embedded length in contrast to other post-cure
conditions. The post-cure condition of PC8h and PC16h improved the interfacial
shear strength (IFSS) in comparison with that of PC4h. The post-cure condition
of PC24h decreased the IFSS as compared with that of PC16h. The sizes of the
meniscus for both PC8h and PC16h were larger than that for both PC0h and
PC4h. The surface of glass fiber was relatively smooth in all the post-cure
conditions. The residual thermal stress was increased due to post-cure. The
mechanical anchoring contributed to the increase in the IFSS.
Keywords: post-cure, glass/vinylester composites, microdroplet test, interfacial
properties, mechanical anchoring.
1 Introduction
Fiber reinforced polymeric matrix (FRP) composites are widely used in the
aircraft industry and infrastructure because of excellent specific strength, specific
Keywords
post-cure, glass/vinylester composites, microdroplet test, interfacial
properties, mechanical anchoring.
Related Book
Other papers in this volume
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