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"bending stress-strain curve" or "compression stress-strain curve"?

Submitted by mahmood seraji on

Hi 

I want to model the lightweight slab and since i do not have the material behaviour of the slab, i have to do testing. i was searching in internet and i got two different concept: "bending stress-strain curve" and "compression stress-strain curve". i do not know which one should i follow? and is there any difference?

Regards.

puzzle in the asymmetric four-point-bend sepcimens.

Submitted by pflines on

HI, everyone,

 This is pflines, i am working on the mode I\II fracture toughness.

i want to use the asymmetric four-point-bend sepcimens to get the value of KI and KII,

 but did not found a clear formulation to caculate the KI and KII,

 anyone could help me?

convergence difficulty due to the stiffness degradation in Abaqus

Submitted by morteza roostaei on

Hello everybody

I am simulating hydraulic fracturing operation with Abaqus. I have used cohesive elements and also utilized viscous regularization to cope with convergence difficulty. However, the problem still persists. Should I stick to regularization technique or should I write a user subroutine that will allow more flexibility. 

  Thank you

Fracture of electrodes in lithium-ion batteries caused by fast charging

Submitted by Kejie Zhao on

During charging or discharging of a lithium-ion battery, lithium is extracted from one electrode and inserted into the other.  This extraction-insertion reaction causes the electrodes to deform.  An electrode is often composed of small active particles in a matrix.  If the battery is charged at a rate faster than lithium can homogenize in an active particle by diffusion, the inhomogeneous distribution of lithium results in stresses that may cause the particle to fracture.  The distributions of lithium and stress in a LiCoO2 particle are calculated.  The e

Im looking for a PhD Position in the area of molecular simulations

Submitted by Mario Cyril Pinto on

   My name is Mario Pinto. I have a bachelors degree in Mechanical Engineering (2006) and a masters degree in Computational Science (2008). Since August 2008, I have been working at Computational Research Labs, Pune, India in the Computational Materials Group. My work mostly involves the use of MD, and I use LAMMPS for all simulations.



    I am looking for a PhD position in the area of molecular simulations, applied to studystructure / properties /