| Summary: | 碩士 === 國立成功大學 === 航空太空工程學系 === 85 === The goal of research is to evaluate property of injection
molded sandwich plate. The skin and core of this
construction are made of continuous fiber composite and general
plastics respectively. In general ,injection molded parts have
low production rate and low strength. onthe other side,
composites have high strength but long production time.
Consequently, the injection molded sandwich construction
combining highstrength and high production rate appear. From the
results of preliminarystudy before of the mechanical properties
, the tensile bending strengthare improved. The objective of
this research is to evaluate the fatigueproperty and the
possible failure modes under tension-tension condition. The
influence of the thickness effect will be also disscussed.
The scanning electronic microscope(SEM) will be used to
investigate the fracture morphology. It is expected that data
base of the mechanicalproperties of this new construction can be
established. The results ofthis thesis reveal that the fatigue
behavior of sandwich constructionis based on long fiber
dominated and S-N curve descents linearly withno obvious fatigue
limit.
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