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Early applications of the finite element method to crack problem was
developed by Swedlow and et al. Even though they could get reasonable
accuracy about 5 to 10%, later study showed that solutions in the
vicinity of the crack tip cannot be guranteed to be accurate regardless
of the mesh density around tip. In order to overcome this problem,
people developed special crack tip elements.



In this term paper, I'm going to present 1) Finite Element Method in
Fracture Mechanics and 2) NewFinite Element technique so called Extended Element Method.

Abstract

One of the most common problems in older people is the fragility of the bones. Human bones are prone to fracture, and fracture of certain bones in the body such as the cortical bone may be fatal. Understanding of the fracture mechanism of bones is essential for the medical profession, and plays a major role in the study of osteoporosis as well.  

Abstract: 

Abstract

With the scaling of VLSI, ultra low-k dielectrics with porosity are being introduced to reduce the capacitance coupling. But due to the weak bonding strengths, low-k dielectrics may fail by environmental-assisted subcritical cracking, fracture at stresses far below the loads required for catastrophic failure, causing reliability issues. In this term paper, several references are reviewed to investigate the mechanism of subcritical cracking at multiscale levels.

Hi

I am working on probailistic modeling of damages in composite materials. I have my own developed mathematical model for calculating damage probability. Now I am trying to use this model in ABAQUS to see the effect of damages with a certain probability. Please kindly let me know if there is any reference code or tutorial for UMAT where I can apply the damages with different probabilities.

Thanks in Advance

Rezwanur Rahman

The University of Alabama

USA