Blog posts

Hi, I am wondering if anyone can give me suggestion on the following problem.

 I would like to do Frequency response study on a viscoelastic material. The frequency response computation usually takes a modal damping ratio. However the viscoelatic material is defined by K (elastic bulk modulus), G0 (short-time shear modulus), Gi (long-time shear modulus) and Beta (decay constant).

Is there a way to find  the modal damping ratio from the time domain viscoelastic material parameters (K, G0, Gi and Beta)? E.g. in a FEM environment?

 Thanks.

Hi all ... i have been doing element deletion extensively in my analysis but was wondering ... wat are the Pros and Cons of using this method. To my knowledge was wondering how the deleted mass and energy are conserved through out the analysis. Thank you all.

Dear all

I am searching for procedure to calculate stress intensity factor of bonded repair of cracked plate, so any one has any idea how to calculate stress intensity factor in 3D crack model By ANSYS, please guide me. I need your help.

Looking for your help.

Please share your valuable documents at:-

himanshu [at] iitp.ac.in

hpiitp [at] gmail.com

Once every four years, the International Union of Theoretical and Applied Mechanics (IUTAM) holds a Congress, the International Congress of Theoretical and Applied Mechanics (ICTAM). 

Important dates: 

31 July 2010 Abstract submission (abstract on one page)   

15 Aug. 2010 Abstract acceptance  

30 Aug. 2010 Early registration  

30 Sept. 2010 Full manuscript submission (full paper on six pages)

  27-30 Dec. 2010 Conference sessions

Dear iMechanica commmunity,

we are looking for 3 PhD students at Oxford, starting from the 1st of October 2010 or as soon as possible thereafter. The closing date for the application is the 26th of July. The 3 students are required for two different research projects, namely:

1) Underwater blast on composite structures - open only to EU nationals; 2 PhD students are required. The studentships are advertised here

http://www.eng.ox.ac.uk/jobs/job.html?job=255

Dielectric elastomer, as an important category of electroactive polymers, is known to have viscoelastic properties that strongly affect its dynamic performance and limit its application. Very few models accounting for the effects of both electrostatics and viscoelasticity exist in the literature, and even fewer are capable of making reliable predictions under general loads and constraints. Based on the principals of nonequilibrium thermodynamics, this paper develops a field theory that fully couples the large inelastic deformations and electric fields in deformable dielectrics.