I hope some of you may find this work interesting:
Strain gradient plasticity-based modeling of hydrogen environment assisted cracking
Emilio Martínez-Pañeda, Christian F. Niordson, Richard P. Gangloff
Acta Materialia, 117, pp. 321-332
http://www.sciencedirect.com/science/article/pii/S1359645416305183
A pre-print is available at www.empaneda.com
I had implemented Degenerated shell element by Ahmad et. al (1970). This element performs very poor in case of geometries like rectangular hyperbolic paraboloidal shells. When I modified the strain vector (only shear strain) with a additional -2*w/Rxy (Sahoo and Chakraborty, J. Strain Analysis (2004)), the solutions are not ok. Can you please suggest me if any other things I should be careful?
Hello everyone,
I am beginner of UMAT.
I am now modeling the model for uniaxial compression of shape memory alloys based on plasticity model and backward euler method.
My material is in cubic 1*1*1. It seems to be simple problem.
Anyway, I am still not familiar with UMAT and Abaqus.
The problem is I apply load just only in Y-axis and specify the boundary condition as in attached file
I think that it passed the plastic deformation zone and abaqus try to calculate...
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Newly published book chapter - http://link.springer.com/chapter/10.1007/978-3-319-31662-8_4 Aerogels are ultralight solids with nanoporous structure and are one of the world’s lightest materials available in the market. It is a dry gel, principally made up of 99.8 % of air and weighing just around three times that of air. The first aerogels were realized in 1931, when Kistler (J Phys Chem 36:52–64, 1932) attempted to remove liquid from a wet gel.
Newly published book chapter - http://link.springer.com/chapter/10.1007/978-3-319-31662-8_4 Aerogels are ultralight solids with nanoporous structure and are one of the world’s lightest materials available in the market. It is a dry gel, principally made up of 99.8 % of air and weighing just around three times that of air. The first aerogels were realized in 1931, when Kistler (J Phys Chem 36:52–64, 1932) attempted to remove liquid from a wet gel.
Hello Everyone,
I am trying to understand how does node based submodeling work in abaqus? I am not able to comprehend how to transfer nodal outputs from some other FEM package so as to perform submodeling in Abaqus? Any help in this regard is highly appreciated.
Despite the controversial debates concerning a unified theory, the continuum plasticity has evolved during the last few decades and an uncountable number of articles has been published on the subject. The proposal of Lee to decompose the deformation gradient, F, into elastic part Fe and plastic part Fp (i.e. F=FeFp) combined with the principle of maximum plastic dissipation is used in many publications to formulate the ensuing developments.
