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Force is droped during indentation simulation at the step of indenter withdrawal

Submitted by ABAqirl on
contact problem
ABAQUS CAE simulation of indentation

Dear All,

I have the following problem. I simulate an indentation in two steps. At first step the indenter penetrate to the material. At the second step it withdraws from it. The problem, at the second step force simply drops, although the behaviour of material is elasto-plastic.. What could be the reason? Incorrect boundary conditions, very soft behaviour of material??? Specialists, please help.

 

Best regards

ABAgirl


Postdoctoral postion in multiscale computational mechanics at RPI

Submitted by Suvranu De on
job
Crystal plasticity
postdoctoral position
multiscale modeling
RPI

There is an immediate opening for a postdoctoral research position in the Advanced Computational Research Laboratory at RPI, Troy NY to work on Multiscale Computational Mechanics. Encouraged to apply are creative, self-motivated candidates with a sound background in computational mechanics. RPI is home to the CCNI, one of the most powerful university-based super-computational research facilities in the world.



Qualifications:

1.    PhD in Computational/Applied Mechanics/ Computational Materials Science or related topic.

Mechanics and chemical thermodynamics of phase transition in temperature-sensitive hydrogels

Submitted by Cai Shengqiang on
research
suo group research
hydrogels
phase transition
temperature-sensitive

This paper uses the thermodynamic data of aqueous solutions of uncrosslinked poly(N-isopropylacrylamide) (PNIPAM) to study the phase transition of PNIPAM hydrogels.  At a low temperature, uncrosslinked PNIPAM  can be dissolved in water and form a homogenous liquid  solution.  When the temperature is increased, the solution separates into two liquid phases with different concentrations of the polymer.   Covalently crosslinked PNIPAM, however, does not dissolve in water, but can imbibe water and form a hydrogel.  When the temperature is changed

PhD position at Loughborough University: 'Plasticity in small length scales'

Submitted by Anish Roy on
job
computational mechanics
Plasticity
PHD position
Nano-Meso-Micro-Continuum Mechanics
Seeking PhD positions

As one of the biggest Departments of its kind in the UK, the Wolfson School of Mechanical and Manufacturing Engineering has an international reputation for being at the forefront of technological innovation and for maintaining extensive links with industry.

http://www.lboro.ac.uk/departments/mm/index.html

See while you Measure: In-situ Studies in Mechanics (September Journal Club Topic)

Submitted by Aman Haque on
research
mechanics
in-situ electron microscopy

*Participation to this club is as easy as i) sending a reference/abstract of your paper if you are working in this area or ii) send a challenge concept/issue/expt if you are not experimentalist :)*  

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