Crack, pin holes or dry kind of surface occurring on the surface of CFRP sheet


Crack, pin holes or dry kind of surface occurring on the surface of CFRP sheet
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Gaurav Kumar Thakur
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Gaurav Kumar Thakur
posted 3 Years Ago HOT
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What could be the reason for the Crack, pin holes or dry kind of surface occurring on the surface of CFRP sheets?
The plate is made of out of autoclave pre-preg system,using 10mm thick glass as a mold.




Edited 3 Years Ago by Gaurav Kumar Thakur
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Crack, pin holes or dry kind of surface occurring on the surface of CFRP sheet
Gaurav Kumar Thakur - 3 Years Ago
     It is very difficult to see the issue in those pictures, but I can sort of see that the surface maybe looks a little bit lean. Which to me indicates a flow issue, which means your cure cycle likely.....
Hanaldo - 3 Years Ago
             Its 200 GSM epoxy based pre-preg system.Yes we can set up the ramp rate and dwell time in oven: ramp rate : 2 degree/C and the dwell time is 50 degree -10 min,80 degree -10 min,120 degree -60 min. I....
Gaurav Kumar Thakur - 3 Years Ago
                 Need to know the brand and model number of the prepreg. In my personal experience, if you're trying to use anything but EC XC110 or one of the SHD OOA prepregs, you're going to have problems like thi...
KLComposites - 3 Years Ago
                     5 years ago I would have agreed with you, but since Covid made reliable supply from England tough for me I've actually spent the last year sourcing and testing 5 or 6 different OOA pre-pregs that wor...
Hanaldo - 3 Years Ago
                         Thanks for your reply!! Actually the vendor has given the curing cycle and ramp time, which I was following.But now I will try out the suggestion given by you. Meanwhile, I have shared the data shee...
Gaurav Kumar Thakur - 3 Years Ago
     Took a look at the data sheet - they don't expressly say that it is an out-of-autoclave pre-preg? They mention vacuum bagging, but it does technically still work with vacuum only pressure it is just....
Hanaldo - 3 Years Ago
             Actually they have claimed that this OOA prepreg & also I am applying vacuum pressure while giving the heat cycle through out the process. I will try out the suggestion given by you and let you know....
Gaurav Kumar Thakur - 3 Years Ago

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