/PROP/TYPE23 (SPR_MAT)
Block Format Keyword This generic spring property can only be used with spring materials /MAT/LAW108 (SPR_GEN) or /MAT/LAW113 (SPR_BEAM) and assigned to a part (/PART).
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/PROP/TYPE23/prop_ID/unit_ID or /PROP/SPR_MAT/prop_ID/unit_ID | |||||||||
prop_title |
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
Imass | Area | Inertia | Skew_ID | sens_ID | Isflag |
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
Imass | Volume | Inertia | Skew_ID | sens_ID | Isflag |
Definition
Field | Contents | SI Unit Example |
---|---|---|
prop_ID | Property identifier. (Integer, maximum 10 digits) |
|
unit_ID | Optional unit identifier. (Integer, maximum 10 digits) |
|
prop_title | Property title. (Character, maximum 100 characters) |
|
Imass | Input type for the spring mass calculation.
|
|
Area | Cross-section area of the spring
element. (Real) |
|
Volume | Volume of the spring element. (Real) |
|
Inertia | Spring mass moment of inertia. (Real) |
|
Skew_ID | Skew system identifier. (Integer) |
|
sens_ID | Sensor identifier. (Integer) |
|
Isflag | Sensor flag. 3
(Integer) |
Example (Spotweld - No Rupture)
#RADIOSS STARTER
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#- 1. LOCAL_UNIT_SYSTEM:
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/UNIT/2
units for material and property
Mg mm s
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/PROP/SPR_MAT/26/2
SPOTWELD_NO_RUPTURE
# Imass Volume Inertia skew_ID sens_ID Isflag
2 1 6.55E-6 0 0 0
/MAT/LAW113/26/2
SPOTWELD_NO_RUPTURE
2E-6
# Ifail Ileng Ifail2
# K1 C1 A1 B1 D1
100000 0 0 0 0
# fct_ID11 H1 fct_ID21 fct_ID31 fct_ID41 delta_min1 delta_max1
1 1 0 0 0 0 .5E-1
# F1 E1 Ascale1 Hscale1
0 0 0 0
# K2 C2 A2 B2 D2
500000 0 0 0 0
# fct_ID12 H2 fct_ID22 fct_ID32 fct_ID42 delta_min2 delta_max2
2 1 0 0 0 -.5E-1 .5E-1
# F2 E2 Ascale2 Hscale2
0 0 0 0
# K3 C3 A3 B3 D3
500000 0 0 0 0
# fct_ID13 H3 fct_ID23 fct_ID33 fct_ID43 delta_min3 delta_max3
2 1 0 0 0 -.5E-2 .5E-2
# F3 E3 Ascale3 Hscale3
0 0 0 0
# K4 C4 A4 B4 D4
5000000 0 0 0 0
# fct_ID14 H4 fct_ID24 fct_ID34 fct_ID44 delta_min4 delta_max4
0 1 0 0 0 -.015 .015
# F4 E4 Ascale4 Hscale4
0 0 0 0
# K5 C5 A5 B5 D5
5000000 0 0 0 0
# fct_ID15 H5 fct_ID25 fct_ID35 fct_ID45 delta_min5 delta_max5
0 1 0 0 0 -.015 .015
# F5 E5 Ascale5 Hscale5
0 0 0 0
# K6 C6 A6 B6 D6
5000000 0 0 0 0
# fct_ID16 H6 fct_ID26 fct_ID36 fct_ID46 delta_min6 delta_max6
0 1 0 0 0 -.015 .015
# F6 E6 Ascale6 Hscale6
0 0 0 0
# V0 Omega0 F_cut Fsmooth
0 0 0 0
# C n alpha beta
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#- 7. FUNCTIONS:
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/FUNCT/1
spotweld tensile function
# X Y
-250.0 -8250.0
-0.25 -8250.0
0.0 0.0
0.25 8250.0
250.0 8250.0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/FUNCT/2
Spotweld shear function
# X Y
-250.0 -25000.0
-0.25 -25000.0
0.0 0.0
0.25 25000.0
250.0 25000.0
#enddata
Comments
- This property can only be used with /MAT/LAW108 (SPR_GEN) and /MAT/LAW113 (SPR_BEAM). When used with these spring materials, the spring behavior is the same as /PROP/TYPE8 (SPR_GENE) or /PROP/TYPE13 (SPR_BEAM), respectively.
- Spring coordinate
system:
- When this property is used with /MAT/LAW108
(SPR_GEN):
The spring local system is defined by a skew coordinate system. The local system can be defined for each element using /SPRING Skew_ID. If Skew_ID is not defined for each element, the local system defined in the /PROP/TYPE23 (SPR_MAT) Skew_ID is used. If a system is not defined in the element or property, then the global system is used.
- When used with /MAT/LAW113 (SPR_BEAM):
The spring's direction is defined using nodes N1 and N2 of the spring.
If the node of the spring N3 is defined, the spring's direction is defined using nodes N1 and N3 of the spring. N3, N2, and N1 should not be in a line.- The
direction
is:
(1) - If node N3 is not defined in the element input, and skew
system is defined in the property input, the
direction
is:
(2) - If neither node N3 nor skew system are defined in input,
the
direction
is:
(3) Except when the spring local direction and are colinear then:(4)
Finally, direction is found as:(5) - The
direction
is:
- When this property is used with /MAT/LAW108
(SPR_GEN):
- Spring activated
and/or deactivated by sensor defined in sens_ID and depends on Isflag:
- If Isflag = 0, the spring element is activated by the sens_ID and cannot be deactivated. The initial length of the spring is based on the spring length at time=0.
- If Isflag = 1, the spring element is deactivated by the sens_ID and cannot be activated. The initial length of the spring is based on the spring length at time=0.
- If Isflag = 2, the spring is activated and/or deactivated by sens_ID and can switch activation state multiple times. If sensor is activated, the spring is active; if sensor is deactivated, spring is inactive. The spring initial length, , is the distance between spring nodes at the time of sensor activation.
- Spring elements with sensor activation or deactivation are mainly used in the pretension models.