Dear Prof. Hong, My name

Tung Nguyen — Wed, 26 Nov 2008 10:26:16 -0500

Dear Prof. Hong,

My name Nguyen Thanh Tung. I am looking for a PhD position in metamaterial which exhitbits the negative refractive behavior. I am getting Msc degree in Department of Physics, Hanyang University, Korea (expected Winter 2009). Is it possible for me to apply to these topics you mentioned above (still working in metamaterial field is my dream)? If you need my CV, pls take a look in this link http://www.imechanica.org/user/10026

Best regards,

Tung Nguyen

Piecewise linear approximation?

Serdar Goktepe — Fri, 20 Jun 2008 04:41:07 -0400

Hi Raju_Pro,

For a given constant true strain rate, say eps_dot, you can compute the stretch, lambda, by solving the differential equation

lambda_dot/lambda=eps_dot. If the inital condition (at t=0) is the undeformed configuration, the stretch expression becomes

lambda(t) = exp ( eps_dot * t ). From this expression, --depending on the height of your specimen-- you can compute the position

of the cross-head for a given true strain or time, eps = eps_dot * t. This non-linear function can be approximated by using

some linear lines (for moderate rates 5-10 lines should be enough) connecting the selected points. You might like to use finer

divisions in the begining and coarser towards the end. I hope this will be helpful.

Regards,

Serdar Goktepe

iMechanica - experimental - Comments

Dear Prof. Hong, My name

Piecewise linear approximation?