Blog posts

One file is attached.

1. Introduction

2. Elements of linear elasticity

3. Stress intensity factors

4. Energy release rate

5. Fracture toughness

6. Applications of LEFM - Practical Issues 

7. Mixed mode and interface fracture

I am currently conducting biomechanical research on the deflection of the human clavicle during side-impact vehicle collisions. Does anyone have experience with using complex forms of Beam Theory? It may turn out to be fruitless, but I would like to investigate the possibility of using beam theory to model this complex S-shaped bone. Any guidance is much appreciated!

Thank you,

Ali

Dear Guys

I use abaqus cae for modeling and wanna know how should I attech subroutine file to abaqus cae file!

Regards

M. Meisam

I wanted to get some insight in the transient stress intensity factor (SIF).

In the time history, we notice there is an overshoot (~27%)  from the

steady state SIF for a fixed (not propagating crack). I found the

overshoot occurs at the time when the reflected wave from the opposite

crack-tip comes back to the first crack tip. I wanted to know why this

overshoot occurs, what is the physical explanation?

Sandip Haldar 

anyone knows the procedure for solving composite plates in ansys 5.4 or 10.

I have a question that has troubled me for quite a while. Any kind of help would be greatly appreciated. I am computing the strain-energy density in a elastic solid when wave passes through. The formula I use is U=[I1^2+2(1+v)I2]/(2E), where U is the strain-energy density, I1 and I2 the first and second principal stress invariants, v poisson's ratio=0.3, E the Young's modulus. Since I1^2 must be positive, I2 might be negative behind the wave front. U might be negative. However, the textbook and many papers I ran into, says strain-energy density must be positive.