Blog posts

Paris Equation in FCG prediction model

Submitted by uni_students2009 on Sun, 12/20/2009 - 08:14

Hi everyone,

Experimental Observations of Stress-Driven Grain Boundary Migration

Submitted by Tim Rupert on Fri, 12/18/2009 - 21:18

research

Thin Film Mechanical Properties

grain growth

nanocrystalline materials

My coworkers (Dan Gianola, Yixiang Gan, and Kevin Hemker) and I have published research results in the December 18th, 2009 issue of Science. In this work, we perform tension tests on specially designed thin film samples to studying the influence of different stress and strain states on mechanically-induced grain growth in nanocrystalline aluminum. Our results indicate that shear stresses drive grain boundaries to move in a manner consistent with recent molecular dynamics simulations and theoretical predictions of coupled grain boundary migration.

equations

Submitted by uni_students2009 on Fri, 12/18/2009 - 16:22

about 3 day have passed really nobody can do not give some idea about solving this equation?

compressive strength from ansys model

Submitted by sujatha unnikrishnan on Fri, 12/18/2009 - 09:15

hi,

is it possible to find the compressive strength of brick, from finite element model, using ansys. if so, please explain the procedure.

thank you

how to verify the UEL result of ABAQUS

Submitted by windy on Fri, 12/18/2009 - 06:33

how to verify the UEL result of ABAQUS？

can i get the information of some node,such as displacement ,strain ,and so on . how to get ? where to get ? some fortran code should written in UEL?

thanks in andvance!

Communication between Matlab and Nastran

Submitted by jadav.das on Fri, 12/18/2009 - 01:55

research

Hi All,

Could you please tell me how I can make communication between Matlab and Nastran? Actually I want to send some force data from Simulink to a deformable object in Nastran and then I will read the deformation of the object in Simulink. After that I will recalculate the forces and send it back to Nastran till some desired criteria is made. Can anybody help me to figure out this? Could you please pass it to me if you have any source code?

Thanks in advance

Jadav

R C Beams

Submitted by Reza Mousavi on Thu, 12/17/2009 - 21:34

Beam

crack growth

concrete

I am a novice user of abaqus and trying to model crack growth in rc beams with longitudinal reinforcement and stirrups under dynamic loads by try and error method

rebar layers are in shell element and i am using CDP for my concrete. i am trying to find out if i need to have many solid parts or one is enough and if mesh adaptivity is necessary or not because of crack growth . I appreciate any consulting in this field and i will share my knowledge with anybody that helps me

my first error message is

New methods of analyzing indentation experiments on very thin films

Submitted by Li Han on Thu, 12/17/2009 - 21:09

Abstract - Indentation experiments on very thin films are analyzed by employing a rigorous solution to model elastic substrate effects. Two cases are discussed: elastic indentations where film and substrate are anisotropic, and elasto-plastic indentations where significant material pile-up occurs. We demonstrate that the elastic modulus of a thin film can be accurately measured in both cases, even if there is significant elastic mismatch between film and substrate.

This manuscript has been accepted for publication in Journal of Materials Research.