Stiffness and vibrational characteristics of SMS/DER331 composites with shape memory alloy long fibers
SMA-composites are an adaptive composite in which SMA elements are incorporated into fiber reinforced epoxy composites. Many researches have been done on investigating the properties of shape memory effect and superelastic influence in SMA composites. However, little information available on t...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2008
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/7356/1/24p%20MOHD%20NORIHAN%20IBRAHIM%40TAMRIN.pdf http://eprints.uthm.edu.my/7356/2/MOHD%20NORIHAN%20IBRAHIM%40TAMRIN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/7356/3/MOHD%20NORIHAN%20IBRAHIM%40TAMRIN%20WATERMARK.pdf |
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| Summary: | SMA-composites are an adaptive composite in which SMA elements are
incorporated into fiber reinforced epoxy composites. Many researches have been
done on investigating the properties of shape memory effect and superelastic
influence in SMA composites. However, little information available on the effect of
different fiber volume fraction with continuous flexinol long wire to mechanical
strength and vibrational characteristics. This study is mainly focused on the
integration of shape memory alloy (SMA) elements with epoxy composites based on
different fiber volume fraction. The aim is to analyze and investigate static and
dynamic mechanical properties of SMAJDER331 by measuring the first vibration
mode of clamped cantilever beams, elastic strength and hysteresis behavior of SMA�composites through monotonic tensile, cyclic and vibration analysis. This
observation indicates that the Young's modulus increases (1667.083MPa) at 2.4%
fiber volume fraction of flexinol wire of SMAJDER331 compared to matrix Young's
modulus (904.495MPa). The increase of temperature up to 75°C and 90°C lead to the
recovery of stress and strain and therefore closed hysteresis achieved. TIle
temperature dependency of vibration property is affected largely due to the addition
of SMA Flexinol long fibers. The vibrational characteristics of SMA composites can
be improved by the addition of certain amount of flexinol wire. The addition of 2.4%
fiber volume fraction offlexinol long fibers resulted in the highest natural frequency
with the value of 171 Hz at the temperature of 70° C. |
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