Hello,
I want to use Calculix explicit for large deformation problem. I want to use a user subroutine similar to vuhard (in ABAQUS) to model the material behaviour. Calculix documentation metions uhardening, but there is nothing similiar to vuhard.
Is there a way to do this?
Complex structures consisting of intertwined, nominally vertical carbon nanotubes (CNTs) are called turfs. Under uniform compression experiments, CNT turfs exhibit irreversible collective buckling of a layer preceded by reorientation of CNT segments. Experimentally observed independence of the buckling stress and the buckling wavelength on the turf width suggests the existence of an intrinsic material length.
Hey buddies
I am writing a constitutive relation in vumat for plane stress conditions with S4R elemet in the ABAQUS.
the problem is that the E33 is reported as zero where it is not zero and also the values for S11 and S22 are so large numbers.
ihave tried the code for 3D conditions and it work great with C3D8R element and the results are satisfactory where for the Shell elements by enforcing the S33=0, the E33 gets zero too.
does anybody have any solution?
thanks alot
This paper investigates what is the largest magnetoelectric (ME) coefficient of ME composites, and how to realize it. From the standpoint of energy conservation, a theoretical analysis is carried out on an imaginary lever structure consisting of a magnetostrictive phase, a piezoelectric phase, and a rigid lever. This structure is a generalization of various composite layouts for optimization on ME effect.
Shan Tang, Ying Li, Wing Kam Liu and XiaoXu Huang
