reflection boundary condition
I am planning on using finite difference coding to solve a wave equation. The domain is a rectangular domian with wave reflection on the boundaries. Does anyone know how to set the reflection boundary condition?
Noncovalent bonds dictate cell rheology
Over the last ten years, a peculiar behavior of living cells is revealed: their modulus increases weakly with loading frequency (the so-called weak power law behavior) (for a pure elastic solid, the slope is 0; for a viscous fluid, the slope is 1). The underlying mechanism is not clear at all; although a phenomenological soft glass rheology model (a model based on a disordered structure system) has been proposed, it cannot explain the multi-power laws at different loading frequencies (see Stamenovic et al, Biophys J Letter, 2007).
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.
Equilibrium and stability of dielectric elastomer membranes undergoing inhomogeneous deformation
Dielectric elastomers are capable of large deformation subject to an electric voltage, and are promising for uses as actuators, sensors and generators. Because of large deformation, nonlinear equations of state, and diverse modes of failure, modeling the process of electromechanical transduction has been challenging. This paper studies a membrane of a dielectric elastomer deformed into an out-of-plane, axisymmetric shape, a configuration used in a family of commercial devices known as the Universal Muscle Actuators.
Recommending a book on FSI with recent discussion on Immersed Boundary/Continuum Methods
I am writing to recommend my book “Fundamentals of Fluid-Solid Interactions-Analytical and Computational Approaches” recently published by Elsevier Science. The book is available in amazon.com webpage or Elsevier Science webpage. The following is
contact & Geometric non linearity
I am looking for acadmic material to address contact & Geometric (Large deformation) non-linearity problem. Can anyone provide the material to address these two concept in details.
Thanks
Ritesh Parikh
Computational Mechanics PhD opportunities for Top Class Chinese Students
Dear Chinese students interested in a PhD in computational mechanics,
You will find below some information on a fellowship you can apply for.
http://www.gla.ac.uk/studying/scholarships/internationalscholarships/...
China Scholarships Council
Deformation gradient in VUMAT of ABAQUS
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Dear All,
In ABAQUS manual, it is said for hyperelastic material, it is better to define it by stretch tensor U. But if I need to use deformation gradient F in the material model directly, I need to rotate the stress back to corotational frame. How should I do that? Should I make a polar decomposition of F=R*U first, and then apply Rt*S*R? or I can use the relative spin increment already provided to do that? If so, how?
ABAQUS beam elements
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Every engineers,
I am Homo and go to learn ABAQUS, but I have many questions, i.e.:
What is difference between Section points and Integration point in ABAQUS(espesialy in beam elements )?
Waiting for your kindly response
Homo
Scholarships for Computational Mechanics in the UK for non-EU students
Dear non-EU students who want to study in the UK,
You are encouraged to look at the fellowship offers below. If you qualify for these and are interested in working in a dynamic group in computational mechanics in Glasgow, please contact me directly stephane dot bordas at gmail dot com
Our department has a growing team of PhD students (more than 20 at the moment) working in cognate disciplines, which will give you a unique opportunity for a strong PhD in computational mechanics.