The problem is in every textbook of Fracture Mechanics. Can someone please help - in what practical scenarios does one come across such a problem, it is mentioned ina text that the scenario occurs in cracks in rivet holes, however, I cannot understand how.
Hi, Please consider the problem below of a central through crack with a concentrated load as shown below.
Can someone please help where does one come across such a problem in a practical world?
How will I have a concentrated load opening the crack? In the physical world, what is that...
I know. Also, for static loading for ductile materials we do not compute kt. The question is for fatigue we do compute kt because failure in fatigue can be anticipated before material reaches elastic limit / yield point.
Why kf is lesser than kt ? Ductility has no role to play in the reduction...
Hi,
I had been reading about the fatigue stress concentration factor (Kf) which is reduced compared to the geometric stress concentration factor (Kt). The reduction in turn dpends upon the material's sensitivity to notches...
I'm specializing in Applied Mechanics and a dedicated member of this forum. Some insight (without math) in order to have a physical intuition on why we get tensile stresses when the loading is compressive is what I was looking for.
.
You did. But I also said that there is no contact in the...
Can you please elaborate this a bit. I shall be extremely grateful. See attached apper. I'm looking for a physical interpretation for this (as I pointed above). You may just read the abstract and not go into the whole paper.
May be I should not have said about "shelling", in the attached paper...
I have been trying to understand the physical reason for this
I had been reading about shelling in rails: https://patents.google.com/patent/US2853775
Here you can see (as stated):
Shelling occurs near the upper gage corner of the rail and is the result of cold working of the rail steel by...
Hello All,
I had been reading a book on Machine Design.
I understand that at high temperatures, yield strength of the material drops. The behaviour of the fatigue strength i.e. the drop in fatigue strength may at times be taken to be of same proportion as that of yield strength.
It is also...
No, I think you didn't get my question still.See figure below. I have given the expression for σθθ
If you put θ = 0, you get σθθ = - σxx
That is compressive stress . This is what I'm trying to sense physically
1) IF you look at the problem with a plate with a hole., around the hole you have a state of biaxial stress developed, see figure below. This can be proved mathematically if I look into the book by Timoshinko. But can't sense the biaxial stresses physically? Can you? How?
2) IT is not shown in...
Is t right that, in a plate with a hole, subjected to uniaxial loading, along one of the axis, one gets compressive stresses around the crack tip (in the same direction as that of the applied load ). I'm not able to understand this intuitively. Can someone help?
I believe, intuitively, these...
Thanks you very much for the responses.
Just to give you a background, I'm considering the topic that I'm going to update my FE model using the experimental data. [Yes, this is just a fundamental understanding to get hold of the concept. Yes, in practise one may not do the measurement of a...
Hi,I have been reading a text on "Finite Element model updating". This question is not related to the subject of "Finite Element Model Updating" but rather to the subject of "Structural Dynamics" and experimental modal analysis.
My questions is:
1)Let us say I have carried out a free...
Dear All,
Thank you for the reply.
1) Do you think that this problem is unrealistic? That is, not a 'practical problem'?
Do you think the problem is not completely defined? That is, for it to be completely defined, initial states of more degrees of freedom should have been provided than just...