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Help needed with interpretation of received P h curves during NANOINDENTATION

Submitted by Anna Dolgran on
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nanoindentation
elastic modulus

Dear iMechanicas,

 

I just started doing nanoindentation tests on dry biological samples (wood) with a flat punch tip and I have problems analyzing the results! I would be happy if anybody could give me some suggestions.

While running a test I receive quiet good force-displacement curves (no adhesion, good surface find, no time-depend behavior) but the values for the recieved elastic modulus are not stable! The value scatters over the whole range of displacement.

18th Annual International Conference on COMPOSITES/NANO ENGINEERING (ICCE -18), Anchorage, Alaska,USA, July 4-10, 2010

Submitted by Xiangfa Wu on
conference
nanocomposites
mechanics
Composites

The Eighteenth Annual International Conference on
COMPOSITES/NANO ENGINEERING (ICCE - 18)
ICCE-18 Anchorage, Alaska,USA, July 4-10, 2010
http://myweb.polyu.edu.hk/~mmktlau/ICCE/ICCE_Main.htm

Message from ICCE Chairman

modelling of rectangular composite plates using ANSYS

Submitted by sharma_avadesh on
education

I have to analyse the carbon/epoxy composite laminate in ANSYS,  to determine the natural frequency of rectangular composite plates. The plate is simply supported . I  am not able to model the composite lay up with the correct orientation of the fibre. so any body have the step by step procedure for modelling the composite lay up in ANSYS and how to determine natural frequencies  please give it to me on my e-mail:  sharma_avadesh [at] yahoo.com

plastic analysis of a plate containing an edge notch and a piezoelectric inhomogeniety with ansys

Submitted by rojin on
research

Hi,

I am rojin ghandriz,study M.c civil engeeniring at sharif university in iran,

I study on my tesis a bout plastic analysis of a plate containing an edge notch and a piezoelectric inhomogeniety.

I have questions a bout the crack initiation in Ansys v11.0..How could i get initiation of crack whit increasing tensile loading on plate in ansys?

thanks

rojin

Rac activation by stress does not depend on Src

Submitted by Ning Wang on
research
biomechanics

It is known that platelet derived growth factor (PDGF) induced Rac activation depends on Src activity. However, we find that a local stress of physiologic magnitude via integrins can directly activate Rac GTPase rapidly, independent of the Src activity. Our finding on the stress-induced rapid Rac activation challenges the conventional wisdom on mechanotransduction and suggests that stress-induced signaling via focal adhesions does not follow signal transduction pathways induced by growth factors. To view the whole paper:

Two post-doctoral researcher positions in computational materials sciences available at Academia Sinica in Taiwan

Submitted by barbarossapao on
job
ab initio molecular dynamics
Li ion diffusion
surface diffusion
C60
polymer melt

Two post-doctoral researcher positions focusing on the two topics listed below are available immediately at Research Center for Applied Sciencs at Academia Sinica (中央研究院) in Taipei, Taiwan.

1) Ab initio MD simulations of Li ion diffusion on / inside novel electrode materials using accelerated MD. Candidates with expertises in ab initio MD, in particular, BOMD,  are highly desirable.

ALE (Arbitrary Lagrangian-Eulerian) mesh adaptivity in ABAQUS/Standard

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large deformation
contact mechanics
ABAQUS/CAE
ale
mesh adaotivity

Dears,

 I'm doing some numerical analysis on penetration of infra-strucutres on soils (such as CPT tests) in ABAQUS/CAE .. what I'm recently challenging with is to overcome the element excessive distorsion due to large deformations... I have to apply contact constraints in my model...I would appreciate it if you share your expriences with me regarding the following tips:

1- Is it possible to use the ALE (Arbitrary Lagrangian-Eulerian) mesh adaptivity in ABAQUS/Standard? If yes, do you know of any accessible examples (.cae files) or references?

Thermo-mechanical Modeling of Friction Welding

Submitted by ADINA Support on
research
contact
welding
thermo-mechanical coupling
thermo-elasto-plastic

We present an application of ADINA in the thermo-mechanical analysis of friction welding. Please see: 



http://www.adina.com/newsgH61.shtml



You can find many other examples of applications of ADINA in the analysis of multiphysics problems here:   



http://www.adina.com/multiphysics.shtml

Civil Engineering Conference in the Asian Region and Australasian Structural Engineering Conference 2010

Submitted by Sakdirat Kaewunruen on
conference
Civil Engineering Conference in the Asian Region and Australasian Structural Engineering Conference 2010

Civil Engineering Conference in the Asian Region and Australasian Structural Engineering Conference 2010

The 5th International Civil Engineering Conference (CECAR5) hosted by Engineers Australia, together with the Australasian Structural Engineering Conference (ASEC 2010) will bring together a broad cross-section of the civil and structural engineering professions who want to learn, network and advance their technical skills.

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