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Is the study of Low Cycle Fatigue (LCF) and cyclic plasticity useful for biomedical metals?

Submitted by kourousis on
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Cyclic Plasticity
biomedical materials
low cycle fatigue

I would like to open a discussion in relation to the following question:

"Is the study of Low Cycle Fatigue (LCF) and cyclic plasticity useful for biomedical metals?"

It appears that there is some level of misunderstanding around this issue. Thus, I would be very interested to find out the views of iMechanica community engineers and researchers working on biomedical metals and applications (i.e. implants) on this.

A very simple estimate of adhesion of hard solids with rough surfaces based on a bearing area model

Submitted by Mike Ciavarella on
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adhesion
rough surfaces
dmt

"A very simple estimate of adhesion of hard solids with rough surfaces based on a bearing area model" is in press in Meccanica, can be viewed at http://rdcu.be/s0lV Abstract In the present note, we suggest a single-line equation estimate for adhesion between elastic(hard) rough solids with Gaussian multiple scales of roughness.

A theoretical study on the piezoresistive response of carbon nanotubes embedded in polymer nanocomposites in an elastic region

Submitted by Hamid Souri on
research
micromechanics
piezoresistivity
Experimental analysis
Strain sensor
characterization

Herein, we report a theoretical study of polymeric nanocomposites to provide physical insight into complex material systems in elastic regions. A self-consistent scheme is adopted to predict piezoresistive characteristics, and the effects of the interface and of tunneling on the effective piezoresistive and electrical properties of the nanocomposites are simulated. The overall piezoresistive sensitivity is predicted to be reduced when the lower interfacial resistivity of multi-walled carbon nanotubes (MWCNTs) and the higher effective stiffness of nanocomposites are considered.

Measuring the relative density of open cell metal foams

Submitted by rezaalavi1000 on
research
relative density
metal foams
open cell

Hello,

I would like to know how to measure the density of open cell porous iron foam. I am studying the mechanical behavior of pure iron foams for which I need to compare the relative densities of different foam samples. Could the density of the foams be simply calculated by the mass over the bulk volume (volume of the struts + volume of the pores) of the foam? Can I use Archimedes principle to calculate the foam density given that I have open cells? What is the best method to calculate the foam density? 

Best Regards,

Reza

PhD position within Marine Hydrodynamics available at NTNU Trondheim

Submitted by josef.kiendl@u… on
research
Isogeometric analysis (IGA); boundary element method; potential flow; fluid-structure interaction; FSI; flexible propellers

Please check the official announcement at:

https://www.jobbnorge.no/en/available-jobs/job/138439/phd-position-within-marine-hydrodynamics-iv-136-17

Characterization of Human Diaphragm at high strain rate loading.

Submitted by gaurp on
research

In this paper, we studied the strain rate dependent failure properties of human diaphragm tissue using uniaxial tensile testing at four strain rates, i.e. 0.0015/s, 65/s, 130/s and 190/s. The custom made quasi-satatic and drop tower based dynamic test setups was used to conduct the tests uptill 200/s strain rate.

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