Great video! I am more familiar with plastics than I am with composites but I believe what I am about to share applies to composites. Generally speaking, a vernia caliper is fine to use for with but it is not acceptable for thickness measurements, at least not in accordance ASTM D5947 or the equivalent ISO standard. A micrometer should be used for the higher accuracy. All of your videos are great
@engineer Baabun this video explains quite nicely how to apply tabs with a fixture then all one has to do is to precision saw to rough cut them then using a precision grinding/milling machine to get them to their final size th-cam.com/video/h4q1GeVGr6s/w-d-xo.html
Can you or anyone who read this comment to share with me how to attach sandpaper on tab area like she explained in the video? Should I sand the tab area of the specimen first?
how did u attach tabs onto this specimen, Is this CFRP tabs or EMery cloth tabs..As according to ASTM D3039, we can also use EMERy cloth 80 to 150 grit ..Because when I tried to attach CFRP tabs of (50*25 mm) it's very difficult to bond and even after keeping for 2 days for curing, it's slipping.
@@ciksumurni2429 Sure., What I did was I glued mery cloth(150 grit) onto the tensile specimen on both sides (like two on either ends) and I put it to cure for like 24 hrs under a force/weight (spacer)
@@faraz2015 ooo.. Thanks for sharing the technique that u used. May I know do you sand the surface of specimen on the tab area before gluing the sandpaper?
@@ciksumurni2429 The specimen I bond the glue to, they'll be under certain conditions, so you can directly glue it after applying ethanol/acetone just to the bonding area(tab area)
Well, I would say that there is more than one way to measure gauge length of the specimen. If you are using end tabs then the distance between tabs can be considered as a gauge length. If you do not have tabs then distance between grips should be used as gauge length. However, if you are using extensometer then you can neglect what happens outside the gauge length of extensometer and only consider the length in between extensometer legs as gauge length of the specimen (in this case you avoid influence of the stress perturbation within the clamping area). When you report the results it is advisable to report all length scales that are involved. For example, for the specimen shown in the video it would be something like this: the total length of the specimen is 250 mm, the length in between tabs (which often is the same as grip separation distance) is 150 mm and extensometer base length (distance between extensometer legs) is 50 mm. Now depending on what you want to evaluate you can use one of those values. /The L-Tube Team
I assume that you are asking about the length of the end tab. Normally for this type of specimen we use tabs that are 40-50 mm long. Actually tabs do not have to be longer than 50 mm, since this is almost the maximum length which our grips will accept. I hope this answers your question. Best regards /The L-Tube team
Great video! I am more familiar with plastics than I am with composites but I believe what I am about to share applies to composites. Generally speaking, a vernia caliper is fine to use for with but it is not acceptable for thickness measurements, at least not in accordance ASTM D5947 or the equivalent ISO standard. A micrometer should be used for the higher accuracy. All of your videos are great
Thank you very much
You explained it very well
Nice present but your vice is awesome.
Thank You!
Kindly tell us how you tabbed the samples and which material u used for this purpose?
@engineer Baabun this video explains quite nicely how to apply tabs with a fixture then all one has to do is to precision saw to rough cut them then using a precision grinding/milling machine to get them to their final size
th-cam.com/video/h4q1GeVGr6s/w-d-xo.html
Is there a video for creating the method please?
is it possible to do the tensile test on the horizontal tensometer for the rectangular type specimen????
Can you or anyone who read this comment to share with me how to attach sandpaper on tab area like she explained in the video? Should I sand the tab area of the specimen first?
Where'$ the test??????!!!!!
very nice madam
i am working on PMMA Poly methyl meta acralate so is this possible to find all the values for PMMA by your side
please reply
Perfectly
Thanks! :) /The L-Tube team
nice
how did u attach tabs onto this specimen, Is this CFRP tabs or EMery cloth tabs..As according to ASTM D3039, we can also use EMERy cloth 80 to 150 grit ..Because when I tried to attach CFRP tabs of (50*25 mm) it's very difficult to bond and even after keeping for 2 days for curing, it's slipping.
So what did u do else? Bcs I just found this method to apply sandpaper on tab area, how do I attach it? Can u share it with me
@@ciksumurni2429 Sure., What I did was I glued mery cloth(150 grit) onto the tensile specimen on both sides (like two on either ends) and I put it to cure for like 24 hrs under a force/weight (spacer)
I used a good quality Glue for bonding
@@faraz2015 ooo.. Thanks for sharing the technique that u used. May I know do you sand the surface of specimen on the tab area before gluing the sandpaper?
@@ciksumurni2429 The specimen I bond the glue to, they'll be under certain conditions, so you can directly glue it after applying ethanol/acetone just to the bonding area(tab area)
Жирный лайк!
How did you measure the gauge length of your specimen ? Please explain
Well, I would say that there is more than one way to measure gauge length of the specimen. If you are using end tabs then the distance between tabs can be considered as a gauge length. If you do not have tabs then distance between grips should be used as gauge length. However, if you are using extensometer then you can neglect what happens outside the gauge length of extensometer and only consider the length in between extensometer legs as gauge length of the specimen (in this case you avoid influence of the stress perturbation within the clamping area). When you report the results it is advisable to report all length scales that are involved. For example, for the specimen shown in the video it would be something like this: the total length of the specimen is 250 mm, the length in between tabs (which often is the same as grip separation distance) is 150 mm and extensometer base length (distance between extensometer legs) is 50 mm. Now depending on what you want to evaluate you can use one of those values. /The L-Tube Team
Your tabbing looks a little messy there!
can u please tell the astm standard you use for this test
The ASTM D3039 standard is used as guidelines for the tensile test of
polymer composites.
please specify the length for grip you have used for this specimen
I assume that you are asking about the length of the end tab. Normally for this type of specimen we use tabs that are 40-50 mm long. Actually tabs do not have to be longer than 50 mm, since this is almost the maximum length which our grips will accept. I hope this answers your question. Best regards /The L-Tube team
thank you
You are welcome! :)