Failure of woven fiber glass epoxy composite under charpy impact loading
Woven glass fiber reinforced epoxy composite at 55 vol% fiber content was fabricated using conventional hand lay-up method. The impact strength of the prepared samples were measured under Charpy impact test at +50oC and - 50oC temperature. The fractured surface of composite samples were investig...
| Main Authors: | , , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/28168/ http://irep.iium.edu.my/28168/1/Proc._MSM_12_Kelantan_Nazrin.pdf |
| Summary: | Woven glass fiber reinforced epoxy composite at 55 vol% fiber content was
fabricated using conventional hand lay-up method. The impact strength of the
prepared samples were measured under Charpy impact test at +50oC and -
50oC temperature. The fractured surface of composite samples were
investigated using scanning electron microscope. The impact energy for
samples fractured at +50oC was at 380 KJm-2 whereas the low temperature of -
50oC showed impact energy of 178 KJm-2. The high plastic deformation from
the sample tested at +50oC is the evidence from the high amount of absorbed
energy compared to -50oC which revealed lower deformation. At this subzero
temperature, the increased brittleness produced extensive matrix cracking and
fiber splitting. However, scanning electron fractograph at +50oC showed mixed
failure mode of large delaminations, fiber splitting and matrix cracking. The
impact values of 380 KJm-2 and 178 KJm-2 tested at +50oC and -50oC
respectively would suggest that this composite is suitable to replace steel for
impact applications and is safe to be used at both high and low environmental
temperatures. |
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