5.1.1 Stress Amplitudes - DIANA FEA

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    • Examples of principal stress amplitude.

5.1.1 Stress Amplitudes

DIANA can calculate the stress amplitude from the Von Mises stresses or from the principal stresses. For the Von Mises stresses, the amplitude is the difference between the smallest and largest stress. For the principal stresses, the amplitude is the difference between the largest absolute value of the maximum and minimum stresses.

Examples of principal stress amplitude.

Consider the following stress situation of extreme principal stresses
\begin{displaymath}\begin{split}S_{1.\mathrm{max}} = 1.0 &\qquad S_{2.\mathrm{ma... ...mathrm{min}} = 0.5 &\qquad S_{2.\mathrm{min}} = 0.0 \end{split}\end{displaymath} (5.1)
The stress amplitude is calculated by
Sampl = S1.max - S1.min = 1.0 - 0.5 = 0.5 (5.2)
Another example is the following stress situation of extreme principal stresses
\begin{displaymath}\begin{split}S_{1.\mathrm{max}} = 1.0 &\qquad S_{2.\mathrm{ma... ...thrm{min}} = 0.0 &\qquad S_{2.\mathrm{min}} = - 0.5 \end{split}\end{displaymath} (5.3)
the stress amplitude yields
Sampl = S1.max - S2.min = 1.0 - - 0.5 = 1.5 (5.4)

next up previous contents index Next: 5.1.2 Output Selection Up: 5.1 Number of Load Previous: 5.1 Number of Load Contents Index DIANA-10.1 User's Manual - Analysis ProceduresFirst ed.Copyright (c) 2017 by DIANA FEA BV.

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