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Internal Stresses

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Three normal stresses σxx, σyy , σzz and three shear stresses σxy, σxz, σyz are computed by the program.  They are output at the eight nodes and/or at the center of the element.


The program also outputs principal stresses S1, S2, S3 and the corresponding directional vectors (V1x, V1y, V1z) and (V 3x, V 3y, V 3z).  The Von Mises stress, which is often used to estimate the yield of ductile materials, is then computed as follows:



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