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hi, i am using Abaqus standard to model a reinforced beam-column connection subjected to a tip load at the end of the beam. 

i first applied a gravity load followed by a tip load at the end of the beam. halfway through the application of the tip load, abaqus standard

stop and give 2 errors.

1) overstraint at certain nodes of my longitudinal reinforcement

2) negative eigen values

When reading papers about visco-plastic or elasto-viscoplastic simulation, all authors only say that the orientation of grain used in the simulation can be randomly generated, and does not refer to how to generate them. I know the orientation of grain can be expressed by Euler angles (phi1, ph, phi2), but can someone give me advice how to generate euler angles?

Dear All,

How do find the inverse of the rectangular matrix.

The Department of Mechanical Engineering at the University of Colorado
at Boulder invites applications for two full-time positions beginning
fall 2010. The positions are for tenure-track assistant professors with
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higher rank may be considered for experienced candidates. Candidates
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This workshop is being organized under the auspices of the International Federation for the Promotion of Mechanism and Machine Science (IFToMM).

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