Blog posts

Equilibrium theories for a continuum body may be formulated by either of the
following the classic paradigms: (1) We begin with the stress postulation (Cauchy’s formulation) and write down the kinematics, conservation laws, and
constitutive relations. In this way, one can obtain a system of field equations
which, presumably, can be solved upon specifying boundary conditions and
determine the equilibrium state of the body. (2) A second way is to start from
the energy postulation (Green’s

Hi, I am trying to do some simulation with abaqus.

As I downloaded the abaqus 6.12, it needs fortran to support the subroutine.

then, i found fortran 10 and 11 from web, and i should download fortran 10 or fortran 11?

hello,

 I am trying to solve a simple cantilever beam (2D)  in ansys.

I wish to find out the critical time-step that can be used to explicitly solve a transient problem. 

I started with modal analysis to determine the maximum natural frequency of the model. I then computed dt < 2/Wmax.

I use this dt with beta = 0.0 and gamma = 0.25 (Newmark parameters). However the solution is unstable.

I am including my apdl script with this post.

One year ago, I finished a paper on the instability in the polymer.

However, this paper was rejected, which means that this paper made too little

progress in this subject. Thus, we submitted the extended abstract to the conference and full paper in my blog.

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