/PRELOAD/AXIAL
Block Format Keyword Defines a preloading force applied to the set of beam, truss or spring elements.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/PRELOAD/AXIAL/preload_ID/unit_ID | |||||||||
preload_title | |||||||||
Set_ID | sens_ID | Fct_ID | Preload | Damp |
Definition
Field | Contents | SI Unit Example |
---|---|---|
preload_ID | Preloading block
identifier. (Integer, maximum 10 digits) |
|
unit_ID | (Optional) Unit
identifier. (Integer, maximum 10 digits) |
|
preload_title | Preloading block
title. (Character, maximum 100 characters) |
|
Set_ID | Set identifier.
(Integer) |
|
sens_ID | Sensor identifier.
(Integer) |
|
Fct_ID | Preloading ramp function identifier
as function of time (required). (Integer) |
|
Preload | Function Y scale factor. Default = 1.0 (Real) |
|
Damp | Damping ratio (between 0.0 and
1.0). Default = 0.0 (Real) |
Comments
- The preloading tension force is applied to the set of 1D elements Set_ID along the axis (local X: Node 1 to Node 2) or each element. This option can be used to preload a bolt modeled with 1D elements. During the preloading phase, the 1D element stiffness is reduced and reset to its input value at the end of the preloading phase.
- The sensor sens_ID is activated if defined. The abscissa of Fct_ID are shifted according to sensor activation time.
- The Fct_ID is used to ramp up the preload force in the 1D element. The preloading starts from the first point (Tstart) and stops at the last point (Tstop) of the curve.
- The force applied on the 1D is: Fct_ID * Preload.
- Use /SET/GENERAL with 1D element key SPRING (/PROP/TYPE4 (SPRING) (H > 0), /PROP/TYPE13 (SPR_BEAM), and /PROP/TYPE23 (SPR_MAT) with /MAT/LAW113 (SPR_BEAM)), BEAM (/PROP/TYPE3 (BEAM), /PROP/TYPE18 (INT_BEAM)) or TRUSS (/PROP/TYPE2 (TRUSS)). Only one type of element can be defined for each preload card.