Principal Stress Direction

Hello, I have a question about the principal stress direction analysis result from karamba.

The first principal stress direction (PSD) is usually defined as the direction of the largest principal stress. But why in Karamba, some of the 2nd PSDs are larger than that of the first one of the same piece mesh?

First:

Second:

Replies to This Discussion

Permalink Reply by Karamba3D on September 13, 2018 at 2:17pm

Hello X.Arthur.Ma,

the first principal stress is the largest, the second principal stress the smallest of all possible directions. The absolute value of the smallest stress can however be larger than the absolute value of the largest. The length of the vectors represents the absolute values.

Best,

Clemens

Permalink Reply by X.Arthur.Ma on September 16, 2018 at 3:18pm

So, if I'm understanding correctly, this is considering tension/compression together, and with a signed value respectively, isn't it?

Permalink Reply by Karamba3D on September 17, 2018 at 1:28pm

yes.

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Stress is terribly bad for anyone's health.

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Permalink Reply by Terry Austin on July 24, 2024 at 2:24am

Discussing principal stress direction in structural analysis makes me think about how critical stress management is in many fields, including sports. For instance, in the NFL, understanding the biomechanics and stresses on players' bodies could help prevent some of the destry wright injury. Injuries like those suffered by Joe Theismann or Alex Smith highlight the importance of both mechanical analysis and safety protocols. How do you think the principles of stress analysis used in engineering could be applied to improve safety in high-impact sports like football?

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