Structural Instability & Zero Stiffness: Part 1 – Zero Stiffness and Degrees of Freedom

Structural Instability and Zero Stiffness conditions are very common in a model, but if these problems are not rectified, that may lead to incorrect analysis and design result or complete failure of the structure.

In this video, I have discussed various reasons of zero stiffness condition, what is degrees of freedom, and how to interpret the warning messages to identify the problem in the model. Following is the concerned warning messages --

*WARNING- ZERO STIFFNESS IN DIRECTION 4 AT JOINT 16 EQN.NO. 16
**WARNING - THERE WERE MORE THAN 12 DOF WITH ZERO STIFFNESS.

It is very crucial for structural integrity to understand the problem and accordingly rectify the problems - identification and rectification of instability problems will be covered in this video series.

**********************************************************************************

[usmanraza]

Great Quality and to-the-point content. Adressing all queries that can come in one's mind.

[arocenajesussusmerano]

Sir you are the best, that I ever found, in youtube in terms on how you well explained the issues in Instability. The best ever. TBE!..Well done sir..Hope all the best and success in whatever you do...Thank you so much...

[Arsuvalzz]

Best ever explanation... salute to you

[AT-wxbw]

Excellent explanations on how to mitigate errors and warnings.

[kamaldhar]

Nice informative video..keep uploading the same

[juuliusantony]

**WARNING- THE AXIAL COMPRESSIVE STRESS EXCEEDS THE EULER STRESS FOR MEMBER

how this can be resolved plz