I am doing a FE formulation of surface elasticity. I wrote UEL for surface elements in addition to abaqus volume elements. But surfaces may have negative stiffness (constitutive relation as per Morton Gurtin's formulation). So as a result I am getting a warning of "Negative eigen values". Can any body tell me how abaqus is solving for this system matrix (with few negative eigen values) in Static General method?
Conditions in which EIGEN VECTOR zero
Any ideas/references/examples/ tuturials on how to apply loading in ANSYS Workbench? Cyclic or variable amplitude loading.
Thanks.
I am working on semi rigid connections. I am getting difficulty in modelling semi rigid connection in ABAQUS 6.12. Please help me.
It is with great sadness that we post this entry. Ted Belytschko passed away early this morning, 15 September 2014.
There is still time to apply the 5-year post-doctoral position at the University of Southampton. We are looking for a talented young researcher to join a group working on the definition of the next generation of high strain rate tests based on ultra-high speed deformation imaging and inverse identification (PhotoDyn project). Please apply online before September 30th.
These notes are writen for part of a course on plasticity.
These notes are part of a course on plasticity.
I am teaching this course this semester. I'll post notes as I write them. Links to the notes are listed in this post. I will also notify updates on twitter: https://twitter.com/zhigangsuo
