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Dear All,

I am modeling 3D beams with arbitrary cross sections and for that purpose I need to calculate the warping function numerically. The warping function ψ(y,z) is defined as a solution of the following Laplace equation with Neumann boundary conditions:

∂2ψ/∂y2 + ∂2ψ/∂z2 = 0 in Ω,

∂ψ/∂n = z*ny - y*nz on Γ,

where Ω is the cross sectional area, and Γ is its contour. This system can be solved by different numerical methods, for example, finite element method, boundary element method, finite differences...

Numerically I obtain that

hello,

     I have encountered a problem to calculate the stress at interfacial Guass point of each hexahedron element. Since the effective stress is needed to decide whether a cohesive element should be inserted when using the extrinsic cohesive element model, the stress at interfacial Guass point of each element is chosen to calculate effective stress. In the calculation process, the stress at Guass point of each hexaderon element can be obtained.Is there anyone who knows how to calculate the interfacial stress accurately? I would appreciate your comments.

Dear All,

I want to simulate polymer system that have pi-pi interaction between


chains and reinforcements. I know there is no implemention of pi-pi


interaction in lammps.


So, Is there another method to consider pi-pi interaction in lammps? or


I can't simulate these system by lammps.




Regards,


Azadeh

Hi everyone,

                  I am trying to model a 3D reinforced concrete beam in ANSYS. I got difficulties to put reinforcement in concrete. please help.

 Thank you very much.

NSF Summer Institute Short Course on Materiomics—Merging Biology and Engineering in Multiscale Structures and Materials

Hi everybody. My name is Alexander Lyapin. I am a second year postgraduate student of Southern Federal University, Russia, Rostov-on-Don, and I am working in the field of poroelasticity. The topic of my future dissertation is "Dynamic problems of poroelastic enviroments". The main problems in my dissertation are fundamental solutions and enviroments with cavities of common arbitary shape. I use different methods such as boundary integral equations method Fourie transformation method and some other.

I am writing to let you know the release of VAMUCH 3.0,  the 3rd version of our general-purpose micromechanics code. The main new features are: