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fracture

Water diffusion and fracture behavior in nano-porous low-k dielectric film stacks

Submitted by Li Han on
research
fracture
porous
low-k dielectric
diffusion
Among various low-dielectric constant low-k materials under development, organosilicate glasses
OSGs containing nanometer-size pores are leading candidates for use as intrametal dielectrics in
future microelectronics technologies. In this paper, we investigate the direct impact of water
diffusion on the fracture behavior of film stacks that contain porous OSG coatings. We demonstrate
that exposure of the film stacks to water causes significant degradation of the interfacial adhesion

Finite element modelling fracture mechanics of polymer/clay nanocomposites

Submitted by CeciliaPisano on
fracture
interface
Polymer nanocomposites
ABAQUS Cohesive Elements
debonding energy

I am Cecilia. In 2007 I graduated in mechanical engineering at the University of Cagliari (Sardinia, Italy).

During the degree courses I took several classes on structural mechanics, including, Mechanics of Composite Materials,

Fracture Mechanics, Finite Element Analysis (with Ansys and Abaqus).

Now I am a PHD student at the Univesity of Cagliari and this is the aim of my research:

Finite element modelling of polymer-clays nanocomposites with

Inorganic islands on a highly stretchable polyimide substrate

Submitted by Jeong-Yun Sun on
research
fracture
suo group research
vlassak_group_research
SiNx islands
polyimide substrates
stretchability

For a flexible electronic device integrating inorganic materials on a polymer substrate, the polymer can deform substantially, but the inorganic materials usually fracture at small strains.  This paper describes an approach to make such a device highly stretchable.  A polyimide substrate is first coated with a thin layer of an elastomer, on top of which SiNx islands are fabricated.  When the substrate is stretched to a large strain, the SiNx islands remain intact.  Calculations confirm that the elastomer reduces the strain in the S

Averting cracks caused by insertion reaction in lithium-ion batteries

Submitted by Yuhang Hu on
research
fracture
suo group research
lithium-ion battery
cathode material

In a lithium-ion battery, both electrodes are atomic frameworks that host mobile lithium ions. When the battery is being charged or discharged, lithium ions diffuse from one electrode to the other. Such an insertion reaction deforms the electrodes, and may cause the electrodes to crack. This paper uses fracture mechanics to determine the critical conditions to avert cracking. The method is applied to cracks induced by the mismatch between phases in crystalline particles of LiFePO4

FRANC3D - the next generation

Submitted by bjc21 on
software
fracture
software
Franc3d
cornell

I guess it is about time some one from the Cornell Fracture Group got on this site to try help answer questions related to the CFG software or other fracture mechanics related questions.  We do try to answer questions sent to us via email, but sometimes a forum like this would be best and we do appreciate other users input, feedback, and answers.

Call for Abstracts - Symposium on Advanced Computational Methods for Fracture (IMECE 2009)

Submitted by Liang Xue on
conference
fracture
Conference
IMECE
computational methods

This is topic 12-21 Advanced Computational Methods for Fracture in the upcoming ASME Congress 2009 (November 13-19, Lake Buena Vista, FL., USA.) Deadline for abstract submissio: March 2, 2009.

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