# /ANIM/SHELL/TENS

Engine Keyword Generates animation files containing shell tensor data for a specified result.

## Format

/ANIM/SHELL/TENS/Restype/Keyword5/Keyword6

## Definitions

Field Content SI Unit Example
Restype Output tensor:
STRESS
Stress tensor. 2 3
STRAIN
Strain tensor. 4 5
EPSDOT
Strain rate tensor. 3

Keyword5 Result type or location:
MEMB
Membrane. 5
BEND
Bending
N
Integration point number or Layer number for composites properties.
UPPER
Upper Integration point or Layer for composites properties.
LOWER
Lower Integration point or Layer for composites properties.
ALL
All Integration points or Layers for composites properties.

Keyword6 Integration point location .
Only used for /PROP/TYPE51, or /PCOMPP composite properties: 8 9
NIP
Number of integration points through layer, N .
UPPER
Upper integration point (NIP) of the upper layer, N.
LOWER
Lower integration point (NIP ) of the lower layer, N.
ALL
All the integration points (NIP) through the layer, N.

1. Stress and strain tensor are output in the elemental coordinate system.
2. The STRESS output for Keyword5=N, UPPER or LOWER must have N>0 defined in the shell property. When using global integration (N=0 in the shell property), Radioss will output the stress at the midplane, even if the stress at UPPER/LOWER is requested.
3. The stress at UPPER/LOWER is the stress at the upper most/lower most integration point and not an interpolated value based on curvature, like the strain.
4. Strain tensor is output only if Istrain =1 in shell property for material laws < /MAT/LAW25 (COMPSH); except laws /MAT/LAW15 (CHANG) and /MAT/LAW19 (FABRI). For all other material laws, the value of Istrain does not matter.
5. STRAIN output is extrapolated to the outer surfaces. Keyword5=UPPER uses the formula $\epsilon +\left(\frac{t}{2}\right)k$ and Keyword5=LOWER uses the formula $\epsilon -\left(\frac{t}{2}\right)k$ .
Where,
$\epsilon$
Strain at the outer most integration point
$t$
Thickness
$k$
Curvature

For EPSDOT, strain and curvature are replaced by strain rate and curvature rate.

6. Options /ANIM/SHELL/TENS/STRESS/MEMB and /ANIM/SHELL/TENS/STRESS/BEND are generalized stresses (mean values through thickness) per element.
7. For fully-integrated elements, the mean value of 4 Gauss points of the shell surface is calculated. Shell stress can be considered at the center of the element.
8. For /PROP/TYPE51 or /PCOMPP composite properties, if Keyword5 is not defined.

If Keyword4=ALL, the result is output for all layers and the value per layer is the average value of the through thickness integration points in the layer.

If Keyword4=LOWER, the result is the value of the first integration point of the first layer.

If Keyword4=UPPER, the result is the value of the last integration point of the last layer.

9. Keyword5 limitations:

It can only be used with /PROP/TYPE51 or /PCOMPP composite properties and only if Keyword4=N, the layer number. However, Keyword4=ALL can be combined with Keyword5=ALL to output all layers and all integration points. If Keyword5=ALL, results for 10 integration points will be output, even if less integration points were defined in each layer and thus some results will be zero.