Guys,
I want to map the pressure distribution from the outer skin onto the camber line. I assume the structural integrity of the airofoil is provided by the camber and no other stiff internal structures. The pressures on both surfaces after mapping are equal if the airfoil is thin (max 6%...
Hi guys,
I'm using a hyperelastic foam core in my FE model. I am using Abaqus to fit the material so that I can optimize the parameteres defining the foam core during bending. The parameters are: mu (i.e., shear modulus), alpha (i.e., shape of the stress-strain curve) and beta (i.e., shape of...
Hi guys,
Does anyone have any experience in doing some aeroelasticity studies? I mean coupling CFD (e.g., Fluent) and FEA and issues such as pressure distribution from CFD into FEA mesh or type of appropriate FEA job. I've read a paper wherein a FEA bump is subject to aeroelastic forces...
Hi guys,
Does anyone know how to extract the mass and the stiffness matrix of a system (not only for an element)? I need this kind of output to handle further with some other software for some research purposes...
I tried using *Substructure matrix Output card, but it seemed not be...
Hi guys,
Does anyone know any paper or book with official data about the performance of a wing of any commercial airliner, providing ailerons deflection and roll moments, pitch due to roll, etc.
Cheers
Hi guys,
I have 2 weird sets of points to define 2 curves. I need to compute the area between these two. Is there any straightforward way to do it? The position of the curves is changing with respect to X axis, so I'd need a general methodology to do my task, not just for a specific set of...
Hi guys,
I need to assess the performance of a wing when increasing the camber of the grid sections, getting at the end a more cambered tip. I do not take into account any high-lift devices (e.g., aileon) but probably the performance I seek is with respect to a conventional wing. Does anyone...
Does anyone have any experience using VGK for wings on Linux machines? At least some other softwares able to run in batch mode on Unix machines, for relatively simple wing geometries. Fluent is too slow.
I'd appreciate any help.
Suhoi
Hi guys,
Is it possible with Matlab to build a surface based on 2 NURBS? I've used a CAD package for that, but the script runs for a while.
I need to extract the points on the surface (conducted by 2, 3 or even 4 NURBS as bounds, to form a closed profile) equally spaced on the both main axes...
Hi guys,
I've experinced some difficulties in probing the SHELL TO SOLID COUPLING feature.
I have a thin plate (S8R5 elements) with a stiff edge (C3D20R) under a large displacements analysis. The quadratic continuum elements and shell ones are alligned on the common edge, hence there's no...
Hi,
I wanna make use of a nonlinear rotational spring in my model. I only know the trend (theoretically) of the imposed nonlinearity with respect to M-teta pairs. But I am not sure if the idea of this spring is feasible in reality (i.e., manufacturability).
Does anyone have any references, or...
Hi,
I am having some difficulties in modeling my problem.
I have a big plate (it has a variable cross-section spanwise and chordwise) and is a planar patch. It's easy to construct. I want to cover this plate with some flexible foam, which has an irregular shape spanwise and chordwise. I guess...
Hey guys,
I am trying to define a nonlinear spring1, but I am not sure about something:
Is Abaqus interpolating the points I input in my deck, defining the nonlinear rotational spring1? Because I can have a particular value for rotation after analysis, which was not set in my deck. In this...
Hi all,
I am having some dificulties in understanding some issues.
1. I am having a beam model, with thickness variable along its length. The beam is subjected to an offset load (e.g., 0.3% of the beam length). the question is, if I want my beam to exhibit large displacements (elastica)...
