Actually I just edited my comment, High cycle fatigue is normally for N>= 10^4 like for steel and could reach 15 to 20 x10^3 cycles for Ti64. I guess I was confused by the table you showed on the screen where you showed under High cycle 10^4 rather.
10^4 is an assumption that applies for most (but not all) materials. The question specifies "The high-cycle fatigue loading data" and high-cycle means we need to use Basquin's Law.
For.the b value is giving me negative. do we just ignore the negative because it will have a big impact on the result ? Also, for finding the maximum stress you can just substitute the numbers in the equations without doing the Log function. Great work thanks a lot!!
I forgot to write the negative sign for the b value. My bad! However, notice how the sign changes from negative (yellow) to positive (purple) equation for the log form of Basquin’s Law because I SHOULD have written the b value as negative. Meaning you would have had “-(-b)=+b”
In general, ignoring a negative sign (or any type of value), just because it’ll impact your result, isn’t proper justification. For example, if this was on an exam, how would you know which result was right?
Do you have any references for this particular formula? As I am getting the formula in various journal articles in a different way such as - S = A (Nf)^b, so here direct S is taken, while that of in your video, delta S (Smax-Smin) is taken.
i think the greater than and smaller than signs are switched. Shouldn't High cycles be when the cycles is greater(>) than 10^4 and low cycles smaller(
Actually I just edited my comment, High cycle fatigue is normally for N>= 10^4 like for steel and could reach 15 to 20 x10^3 cycles for Ti64. I guess I was confused by the table you showed on the screen where you showed under High cycle 10^4 rather.
10^4 is an assumption that applies for most (but not all) materials.
The question specifies "The high-cycle fatigue loading data" and high-cycle means we need to use Basquin's Law.
Thanks for the help. Clear explanation - subbed!
For.the b value is giving me negative. do we just ignore the negative because it will have a big impact on the result ?
Also, for finding the maximum stress you can just substitute the numbers in the equations without doing the Log function.
Great work thanks a lot!!
I forgot to write the negative sign for the b value. My bad! However, notice how the sign changes from negative (yellow) to positive (purple) equation for the log form of Basquin’s Law because I SHOULD have written the b value as negative. Meaning you would have had “-(-b)=+b”
In general, ignoring a negative sign (or any type of value), just because it’ll impact your result, isn’t proper justification. For example, if this was on an exam, how would you know which result was right?
Yep-you can also substitute the numbers without the log function. There’s often (though not always) more than one way to do something!
At 0:30 why did you take log(192/167) - b? shouldn't it be log(192/167) +b..
Could you please solve this equation without using mathematica 0.005= (490/159195)*(2Nf)^-0.065 + 0.463*(2Nf)^-0.65
Do you have any references for this particular formula? As I am getting the formula in various journal articles in a different way such as -
S = A (Nf)^b, so here direct S is taken, while that of in your video, delta S (Smax-Smin) is taken.
I find it also strange.
2:00
Sir, I have question
1. I want know How to calculate Right side equation
Which paper is it from?
why is stress range twice the amplitude
Lets get into it #peppereng