Hi,
I have to use Hamilton pricinple to evaluate the diff. equation of motion of a string. As shown in the figure below, the string is hanged from one end and is free at the other. The flexural stiffness of the string is negligible.
I have a problem with the potential energy of the string! required in the Hamilton principle. Since the flexural stiffness of the string is assumed to be negligible, is there any other term for potential energy?
Summer Job for Students in Europe: NSF-sponsored International Research Experience for Students (IRES)
International US-European Joint Study of X-Ray Optics Thermomechanical Stability and Control
All classical boundary conditions including two distinct types of simple support boundary conditions are formulated by using the Rayleigh quotient variational principle for rectangular plates undergoing inplane free vibrations. The direct separation of variables is employed to obtain the exact solutions for all possible cases. It is shown that the exact solutions of natural frequencies and mode shapes can be obtained when at least two opposite plate edges have either type of the simply-supported conditions, and some of the exact solutions were not available before.
Hello,
I want to know that is there a novel way of defining several two dimensional contact pairs in Abaqus/Explicit. I know that abaqus has the capability of defining a general contact but it is restricted only to Abaqus standard and 3D Abaqus explicit problems.
I have a 2D plane strain problem where I have to specify more than 1000 contact pairs in the assembly between similar instances of the same part. Is there a fortran subroutine that could be used to determine so many contact pairs?
Thanks,
Tuhin
The ASME Multifunctional Materials Technical Committee of the Materials Division is organizing a symposium on Multifunctional Material Systems at IMECE2010 to be held in Vancouver, Canada, during Nov. 12-18, 2010.
Tentative abstract submission deadline: March 1, 2010
Hi, everyone,
Now I have a problem with getting the material property at each increment from ABAQUS. I have written a USDFLD subroutine to change the material properties at each increment. but I can't monitor the variation. do you have any idea how it is possible?
Thanks
Miad
I have always, and I believe correctly, considered cohesize/bridging models linear elasticity. This is because whether we apply them to holes or cracks, we are solving the equations of ELASTICITY, with nonlinear boundary conditions along the part(s) of the crack along which a traction-separation law is applied. So the material model is totally elastic. All we did was to augment the elasticity theory with an ad hoc physical condition (inspired by experiments such as Dugdale).
