How to write a code for nonlinear vibration of Euler beam by finite element time domain modal formulation?

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How to find initial condition for Duffing equations in reduced modal coordinates?

I want to find nonlinear frequencies of a beam using finite element time domain modal formulation, when equation of motion transfers to a general duffing equation, I need proper initial condition...

01 January 1970 2,698 4 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

Short Synthesis of Graphene Oxide from Natural Graphite Flakes?

I am in search of a modified Hummer's method, which can be used to synthesis graphene oxide within 6-8 hours. As I am a student it is not allowed for us to work after 5 in the laboratory. So I am...

01 August 2024 8,368 2 View

Has anyone looked into the stability of FEM methods on curved meshed?

Google scholar isn't giving me any results on this

27 July 2024 595 2 View

Can diamond be grown using molecular beam epitaxy?

22 July 2024 9,755 2 View

How can I decrease the error of Rietveld method for phase quantification?

Phase quantification in steel contain BCC and FCC

20 July 2024 8,150 7 View

Can someone help with the instrument configuration in Profex using Rietveld Refinement?

I am trying to configure the instrument in Profex but I can't get a chi-squared value below 9.65 for LaB6. This is the configuration of the equipment, which is a Bruker D8 Advance with a Linxeye...

14 July 2024 4,767 1 View

Anyone working in Model updating technique using FEM?

I am trying to model RCC beam with induced corrosion. How to model this beam using model updating technique.

14 July 2024 3,536 3 View

Does democracy have a nonlinear effect on state capacity?

Some research indicates that the fist steps toward democratization of an authoritarian regime actually lowers state capacity. How strong is the evidence for this hypothesis?

14 July 2024 8,239 3 View

I came across oscillations in a pressure profile for a pipeline flow along the axis of a cylinder, how do I prove that these are not numerical err?

In terms of CFD, we often analyze the stability of the error using Von-Neumann analysis, especially for FDM based problems. Should we follow the same approach for a compressible fluid flow using FVM ?

13 July 2024 6,296 5 View

General Axisymmetric Solid Elements 272 & 273: what is their formulation?

Dear Researchers, Recently, my research group and I have been working on understanding the formulation of axisymmetric elements. We began by studying 4-node and 8-node Axisymmetric-Harmonic...

12 July 2024 6,755 2 View