Can you please tell me that which test will show more strength- a 3 point or a 4 point bending test and why? Can we do some modifications in these tests to obtain purely shear cracks and not the flexural cracks? Furthermore, can you please explain me again the lines from 4:39 to 4:52?
jasper schuringa For some reason it appears the 1/2 isn't showing up in the video, and left a nice gap in its place (there's also a good chance I just forgot it!). However, the subsequent equation does take that 1/2 into account.
your moment summation for region B-C at 2:44 should be 1/2Fx + F(x-L/2), i think
You're correct, but his final moment equation (below the summation equation) is correct
thank you! I thought i was going crazy for a second.
Can you please tell me that which test will show more strength- a 3 point or a 4 point bending test and why? Can we do some modifications in these tests to obtain purely shear cracks and not the flexural cracks?
Furthermore, can you please explain me again the lines from 4:39 to 4:52?
Very well explained. Thank you.
I think you made a mistake in your calculation at 2:48, shouldn't the sum of the moments at the cut be ..+F(x-1/2L)+M?
jasper schuringa For some reason it appears the 1/2 isn't showing up in the video, and left a nice gap in its place (there's also a good chance I just forgot it!). However, the subsequent equation does take that 1/2 into account.
Thank you so much for these videos!!!!! :D
It is very useful. Thanks so much.
Really good explanation
excellent
Can we determine Young's modulus from bending test?
ASTM D790 - 10
Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
ASTM C1161 - 13
Standard Test Method for Flexural Strength of Advanced Ceramics at Ambient Temperature
Thanks!
Thank you.
I love you
at 2:50 sum M_cut = 0 = -0.5Fx + F(x-0.5L) + M
Marc C thanks for catching that! Fortunately I corrected that mistake by the next line.