research

Dear Sir，

As we know, periodic signals are best analysed in the frequency domain while stochastic signals are usually more profitably analysed in the time domain. The analysis in the frequency domain usually concern only one signal while in the time domain often involves the comparison of several different signals.

1) what are the general methods for transforming the frequency domain into time domain, and which should be superior?

There is a basic problem in NATURE of approximation of discontinuity in element using XFEM.I tried to illustrate that below:

for example, If you consider an element with strong discontinuity( like fracture or contact) which usually we use heaviside function as enrichment function. we expect two parts of element deform independently because of nature of problem.



In equation for approximation of this element we have two main parts. First  is 'regular' or 'standard' part which uses the standard shape functions of element and Second is the enriched part.

Mechanical tension contributes to clustering of neurotransmitter vesicles at presynaptic terminals. 

Scott Siechen, Shengyuan Yang, Akira Chiba and Taher Saif

Proceedings of the National Academy of Sciences,   August 4, 2009   vol. 106   no. 31   12611–12616 

http://www.pnas.org/gca?gca=pnas%3B106%2F31%2F12611&allch= 

I was wondering if anyone has solved a “sequentially coupled thermal stress analysis” problem using ABAQUS?

If so, here is what I am looking to solve.

Let’s assume we solved for the temperature (T) as a function of time and space using the transient heat transfer analysis given certain BCs.

sir,

I am solving some problomes for Stresses around holes for Anisotropic cases. In this connection most of authors have solved the stresses in cartesian co-ordinates only. Can I have any papers which are solved in polar co-ordinates by Stroh formalism for Stresses around holes in Composite laminates.So kindly help me

thanking you

 M.Ramesh Babu 

hi all,

 I am a mechanical engineer currently pursuing Master degree (Post graduation). Ultimately i also want to pursue a research leading to PhD after my master's. Its my burning desire to do some significant research in the field of Fatigue analysis using Fracture mechanics approach preferably for aerospace domain using advanced CAE softwares like Nasgrow, Afgrow, Abaqus, FE-safe, MSC Fatigue, etc,..

Forthcoming papers of International Journal of Applied Mechanics (IJAM) Vol.1 No.4 

1. “Strain Deconcentration In Thin Films Patterned With Circular Holes”, Matthew B. Tucker and Teng Li, (University of Maryland, USA). 

2. “Thermal-Elastic Behaviors Of Staggered Composites”, Fan Yang , Dai-Ning Fang and Bin Liu  (Tsinghua University, China).