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stress intensity factor

Stress intensity factor

Submitted by Surendran M on
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stress intensity factor
fracture mechanics

Hi I have long been looking for a clear way of defining stress intensity factors. Apart from the usual bookinsh definitions such as "strength of singularity" "state of stress". Of course I could convince myself by relating SIF with Strain Energy Release Rate (G) as 'G' has a more convincing physical meaning explained through the creating of new surfaces. This kind of gives the feeling that 'K' is a derived quantity in the field of fracture mechanics.

So is there a better way of explaining SIF without having to go through 'G'.

 

Thanks and Regards

How to calculate Stress intensity factor through FE programming?

Submitted by mmalekan on
research
stress intensity factor
Java
computer programming

Dear all,

I need to calculate SIF through a FEM program by writing some line of codes. The problem is that I wasn't able to find a reference contains straightforward formulation and procedure for this. Can anybody help me please with this issue?

Cordially,

Mohammad

Discussion of fracture paper #6 - Stress intensity factor for steep yield distribution

Submitted by ESIS on
research
stress intensity factor

T. Yasuoka, Y. Mizutani, A. Todoroki: Applicable limit of the stress intensity factor for steep yield strength distribution, Engineering Fracture Mechanics, 2013, Vol. 110, pp. 1-11.

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What is the crack-tip stress intensity factor of an embedded crack under mode II shear?

Submitted by Rui Tao Qu on
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stress intensity factor
mode II crack

Hi, 

From textbook of fracture mechanics, we know that for an embedded crack subjected to mode I stress state, KI=(2/π)σ√πa, while 2a is the crack size.

But for a embedded crack subjected to a pure shear stress τ, what is the stress intensity factor at the crack-tip?

Thank you 

Ruitao

prediction of crack path which is subjected to stress gradient and biaxial load.

Submitted by Myung Rae Cho on
research
stress intensity factor
stress gradient
biaxial load

Dear all.

I'm currently doing some research concerning crack path prediction in brittle thin film.

But I'm struggled to find efficient way to do it.

In reality my case: stress is higly confined within semi infinite narrow rectangular strip patten and out of this rectangular, stress is very low or near 0 compared to stress within the pattern. Crack starts from left side end and propagates within pattern toward right end side of pattern. Crack show wavy propagation behavior with regular period and amplitude. 

SIF for 3D crack in ANSYS

Submitted by himanshu_pathak on
stress intensity factor
ansys
3D crack problem

Dear all

I am searching for procedure to calculate stress intensity factor of bonded repair of cracked plate, so any one has any idea how to calculate stress intensity factor in 3D crack model By ANSYS, please guide me. I need your help.

Looking for your help.

Please share your valuable documents at:-

himanshu [at] iitp.ac.in

hpiitp [at] gmail.com

Stress intensity factors for a slanted crack under compression

Submitted by Julien Jonvaux on
research
crack
stress intensity factor
compression
j-integral

Hello everyone,

Here is the problem I have: I'm modeling the geometry of a simple straight edge crack in a 2D elastic medium using Abaqus. I assume plain stress conditions. The crack makes an angle with the horizontal, is small enough to be considered as embedded in an infinite domain (ratio crack length/size of domain < 1/10) and I apply a vertical compressive load on top of my domain. I fixed one point in displacement at the bottom of it and the whole bottom edge is constrained not to move vertically.

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