Skip to main content

Blog posts

crack tip closure concept

Submitted by uni_students2009 on

measurment of FCG based on crack tip closure concept depend on :

1- experimental technique

2-location of the measurement

3- mean stress effect on FG at high stress ratio can not be explained by the closure model due to the absense of the crack closure at high loads.

Two question can be investigated as follows:

1- why crack tip closure is popular and it widely use in hightech industry like aircraft industry acording to overwiew of scentific articles.?

A Different Kind of a Book Involving Electromagnetism and Potential Theory

Submitted by Ajit R. Jadhav on

Unlike other blog-posts of mine, I am not going "own" this particular thread. By that, I mean to say: I am going to only begin this thread and immediately turn it over to you completely. I am not going to watch over whether the discussion here continues to stick to its main theme or not, whether it slides into some minor side issues, whether it deserts the main theme altogether, etc., the way I usually do.



- - - - -



This thread is meant to be about the following book:

 

how can i measure local stress and strain in fatigue crack tip?

Submitted by uni_students2009 on

It seems that the measurment of local stress and strain in fatigue crack tip will be difficult. some researcher use F.E analysis method,in contrary using of numerical solution. however analytical method also has investigated. what method you can imagine? i need a brain storm in this issue.

 

Thank you

Hadi

Frictional Coulomb model in Abaqus

Submitted by Nicholas Fantuzzi on

Hello everybody,

I'm trying to add friction in my model.Now I have a body that is simply supported in a direction (vertical) and free to move in another one (horizontal). I want to use Coulomb friction in the horizontal direction in order to reduce displacements in that direction.

I read Abaqus User's Manual vol5 30.1.5 (frictional behavior) and I followed commands written there, but I think that works only with multiple bodies and not with a single body. I'm using Abaqus 6.7-1.

Could Someone help me?

Many many many thanks

Nicholas