4. Quantity and components introduced in Code_Aster

The calculated values are stored at Gauss points or at the nodes depending on the option selected. The size FACY_R (FAtigue CYclique) has been introduced in the size catalog.

For periodic loading and maximum shear critical plane type criteria

DTAUM1	first value of the maximum half-amplitude of the shear in the critical plane
VNM1X	component \(x\) of the normal vector at the critical plane linked to DTAUM1
VNM1Y	component \(y\) of the normal vector at the critical plane linked to DTAUM1
VNM1Z	component \(z\) of the normal vector at the critical plane linked to DTAUM1
SINMAX	maximum normal stress at the critical plane corresponding to DTAUM1
SINMOY	mean normal stress at the critical plane corresponding to DTAUM1
EPNMAX	maximum normal deformation at the critical plane corresponding to DTAUM1
EPNMOY	mean maximum deformation at the critical plane corresponding to DTAUM1
SIGEQ	Equivalent stress in the sense of the selected criterion corresponding to DTAUM1
NBRUP	number of cycles before failure (a function of SIGEQ1et of a Wöhler curve)
DOMMAGE	damage associated with NBRUP1 (ENDO1 =1/ NBRUP1)
VNM2X	component \(x\) of the normal vector at the critical plane linked to DTAUM2
VNM2Y	component \(y\) of the normal vector at the critical plane linked to DTAUM2
VNM2Z	component \(z\) of the normal vector at the critical plane linked to DTAUM2

Table 5.5-1: Components specific to multiaxial cyclic fatigue for periodic loading

For non-periodic loading and the criteria for the type of critical plan maximum damage

VNM1X	component \(x\) of the normal vector at the critical plane related to the max damage
VNM1Y	component \(y\) of the normal vector at the critical plane related to the max damage
VNM1Z	component \(z\) of the normal vector at the critical plane related to the max damage
DOMMAGE	damage associated with the cargo block
VNM2X	component \(x\) of the normal vector at the critical plane related to the max damage
VNM2Y	component \(y\) of the normal vector at the critical plane related to the max damage
VNM2Z	component \(z\) of the normal vector at the critical plane related to the max damage

Table 5.5-2: Components specific to multiaxial cyclic fatigue for non-periodic loading

The parameter “DOMMAGE” is for operator POST_FATIGUE. The ENDO1/ENDO2 parameter is for operator CALC_FATIGUE

For non-periodic loading, if there is only one critical maximum damage plane, VNM2X, VNM2Y, VNM2Z are the same as VNM1X, VNM1Y, VNM1Z. If several planes exist, an alarm is issued and the first two plans are released.