Blog posts

Determining the elastic modulus and hardness of an ultra-thin film on a substrate using nanoindentation

Submitted by Li Han on Tue, 10/14/2008 - 19:33

research

thin films

nanoindentation

vlassak_group_research

Elastic properties

Substrate effect

Abstract – A data analysis procedure has been developed to estimate the contact area in an elasto-plastic indentation of a thin film bonded to a substrate. The procedure can be used to derive the elastic modulus and hardness of the film from the indentation load, displacement, and contact stiffness data at indentation depths that are a significant fraction of the film thickness. The analysis is based on Yu’s elastic solution for the contact of a rigid conical punch on a layered half-space and uses an approach similar to the Oliver-Pharr method for bulk materials.

hi, everybody , i am new here and it's nice to be a part of this community

Submitted by sameer2008 on Tue, 10/14/2008 - 19:15

hi, how r u everybody?

Problem with 3D Fem sparse matrix ( plz help me)

Submitted by sameer2008 on Tue, 10/14/2008 - 19:05

FEM

hi,

Indentation test modelling on Ansys

Submitted by wongyiungying on Tue, 10/14/2008 - 14:42

I am currently doing simulation on Ansys regarding the indentation test for viscoelastic material. I have some problem with the contact element.. Can someone help me on?

regarding nanoindentation simulation in abaqus

Submitted by aravind_eight on Mon, 10/13/2008 - 20:39

regarding nanoindentation simulation in abaqus

Hi i wanted to know how can we simulate dynamic indentation computationally

mesh type

Submitted by aslan ahadi on Mon, 10/13/2008 - 05:57

research

Hot compression

i am trying to simulate hot compression behaviour of a titanium alloy. in this investigation i consider this material as strain rate and temperature dependent. also i consider all kind of heat transfer like conduction between cylinder and Die also cylinder and enviroment.

can any body help me in detailed, that what kind of mesh is the most appropriate one for this analysis.(Reduction in height is 50%)

iMechanica: 9000 registered users, 30,000,000+ web hits

Submitted by Teng Li on Mon, 10/13/2008 - 03:51

opinion

iMechanica iMechStat

The number of registered users of iMechanica reached 9000 on 13 October 2008, after two years and one month since the website launch. The total number of posts is 4036, the total number of comments is 8888, and the total web hits is estimated to be more than 30,000,000.

Hosted at Harvard School of Engineering and Applied Science and maintained by a growing number of volunteers, iMechanica aims

computational fluid dynamics or computational solid mechanics

Submitted by Zahidul Mustakim on Sun, 10/12/2008 - 07:42

which one has more applications in Bio and Nano technology- Computational fluid dynamics or computational solid mechanics?

Crack tip stress and formation of Plastic/influence zone for composite solid rocket propellant

Submitted by Yogesh Bansod on Sun, 10/12/2008 - 00:16

education

stress

crack tip

crack propogation path

formation of plastic/influence zone

composite solid rocket propellant

Crack tip stress and formation of Plastic/influence zone for composite solid rocket propellants

The necessity to understand the crack behaviour of composite solid rocket propellants as it helps in analysis of service life of rocket motors. Experimental data reveals that a material’s microstructure at the crack tip can have a significant effect on the local damage near the crack tip and crack growth behaviour in particulate composites.