Hi all,
There are several formulae allowing the computation of tetrahedral volume elements. The weakness of some of them is that they give negative volumes. This is due to the vector dot product and its direction. You must take care when using them.
You have to check your formula with some simple examples like the vertices of the following one: (1,0,0) , (0,1,0) , (0,0,1) , (0,0,0).
Mohammed lamine Moussaoui
Dear all,
I have been trying to model pull of single yarn in abaqus and model is responding. i got a problem now. I am applying velocity in one of the yarn and I am pulling it out.Boundary conditions are fixed on both the sides. to calculate the force that is being applied on to the fabric, pull out force, I summed up all the reaction quantites RF1,RF2,RF3 and i plotted it against displacement. but the force is touching zero sometimes. i dont know the reason. what could it be?
P.S. : I have attached my pull out graph also.
regards
I wrote this report a while back. A small number of printed copies were circulated by Wright Patterson Air Force Based. I attach a scanned copy I recently found online.
I wrote this report a while back, and a limited printing was circulated by Wright Pattterson Air Force Base. I found a scanned version that I attach for your interest.
I have to model the mechanical scribing process in ANSYS.
kindly let me know how to do it?
Regards, Shashi
Carbon nanomaterials (carbon nanotubes, graphene, …) have received significant attention from the academia and industry in the past two decades owing to their superior material properties. Mechanicians have played a major role in the fundamental understanding of the mechanical properties of carbon nanomaterials, and in their wide-range applications.
Nano Letters, 13 (7), 3093–3100 (2013).
I have been trying to run an analysis with the user subrouting UMAT in abaqus 6.12. I have microsoft visual studio 10.0.40219.1 and fortran 10.1.034. I think I linked the compiler correctly, and the path variable should have all the necessary adresses. However, when I run the verification cpp_make, fortran_make, and std_user show errors. here is the fortran_make.txt file:
