Plasticity
Johnson-Cook Material Model, Abaqus Explicit
I am currently running a Quasi-Static compression simulation in Abaqus Explicit using the Johnson-Cook Plasticity option. As the strain gets beyond the elastic range, the stress-strain response begins to oscillate +- 5 MPa around the expected curve. Does anyone know why this is happening and/or how to repair the problem?
Thanks,
D. Barrett Hardin
Elastic-Perfectly Plastic in Abaqus Explicit
Dear Mechanical Engineers,
It's my pleasure to be one of your group. I have a question in Abaqus Explicit and all my friends recommended me to as iMechanica as the explicit Abaqus is more popular to you than us as civil engineers.
potential functional for material exhibts non-associative elastoplastic response
Does anyone knows where I can find any paper discuss the existence of potential functinoal for materials that violate the maximum plastic dissipation principle (due to non-convex yield function and/or non-associately fluw rule)?
FEA modelling with ABAQUS 6.6 of three roller Flow forming process.
Hi
this is Probal from university of western ontario (UWO). I am working on three roller flow forming process and i have to model the deformation specially in the splined area. could you please give me any idea or give any link so that i can have an idea what to do.
thank you probal
interface mechanics
In joint material interface between elastic and elastic-plastic material, how can we show the continuity of displacement theoretically?It must be continuous and compatible of deformation in practical case.Could anyone help me to understand this answer?
"Defects and Microstructure at the Nanoscale and Beyond," Mini-symposium at USNCCM-10, July 16-19, 2009
There will be a mini-symposium entitled "Defects and Microstructure at the Nanoscale and Beyond," at the USNCCM-10 conference in Columbus, OH, July 16 -19, 2009. This topic is of keen interest to the I-Mechanica community and we hope many of you will join us there. Our goal is to bring together researchers from the mechanics, materials, and physics communities to cross-fertilize research on defect-mediated processes in microstructural evolution, with a focus on both hard and soft materials.
shoremeter
hello everybody.
ı am looking for relationship between shore D and shore A.Not a curve i need chart.I would be appreciated if you send me this diagram.I have some hypolon and PU roll .I am using shoremeter to see the hardness .
if you have you may send violetlover [at] mynet.com (violetlover[at]mynet[dot]com)
have a nice day
gökhan
The Change of Microstructure at low temperature
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Recently, we do some work about the dynamic strain aging. In order to investigate the function of solute clouds and precipitates in DSA, we do some experiments. The solution treated LY12 alloys are tested on MTS at low temperature (173K), and the Portevin-Le Chatelier phenomenon disappeared as we expected. But, we need more information about the change of microstructure under the low temperature, what is more the micro-optical observation should be finished in a very short time when we consider the effect of natural aging. Obviously the TEM can not meet our needs.