research

i want to carry out a nonlinear static pushover analysis for a concrete dam, i'm using the concrete damage plasticity model for the above. i'm able to carry out the frequency analysis for the model, but after applying any kind of load the the job gets aborted in both static analysi and static riks analysis.

in static analysis it does not converge, whereas in  static riks analysis it says a zero displacement step ha been encountered and analysi cannot proceed..

can anyone please help me out tof this..

thanks in advance

shijo antony (IIT-R) 

Review: Recent advances in theoretical models of respiratory mechanics

Hi all,

my question is about the history data storage in FEAP.

I am writing element subroutine (elmt01) in FEAP 8.3  for a history dependent problem.

I have written the stiffness matrix subroutine (stiff01), but it needs the data from the previous solution steps (previous strains, stresses, plastic strains, dislocation densities .... nh1,nh2=30 per point).

Editors-in-Chief (July 2011-June 2015)  

 Abstract

Dear All,
These days I am do some research on vibration of circular plates (out-of-plane and in-plane). In the reference, the displacement in radial direction can be expressed with Bessel polynomial. I want to use the Rayleigh-Ritz method to solve these problems. The strain energy and kinetic energy can obtain with integral. If there is the bessel function, how to calculate the integral. Also I want to consider some spring in the boundary to change the boundary conditions.

how to do a crack propagation analysis?

can abaqus be used for doing crack propagation analysis for plates with multiple cracks?

PRL 108,
078103
(2012),  http://prl.aps.org/abstract/PRL/v108/i7/e078103

See also Physics Viewpoint by Bin and Huajian, http://physics.aps.org/articles/v5/19

Inside Science News Service, http://www.insidescience.org/news-service/1.2462