*CONSTRAINED_ SPOTWELD

LS-DYNA Input Interface KeywordDefine a connection between 2 nodes with a possible force based failure model.

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*CONSTRAINED_SPOTWELD_{OPTION}
If OPTION = ID, insert the following line.
(1) (2) (3) (4) (5) (6) (7) (8)
ID
(1) (2) (3) (4) (5) (6) (7) (8)
node_ID1 node_ID2 SN SS N M

Definition

Field Contents SI Unit Example
ID Weld identifier.

(Integer)
node_ID1 Node identifier 1.

(Integer)
node_ID2 Node identifier 2.

(Integer)
SN Normal tensile force at failure.
= 0
No failure.
> 0
Failure.

(Real)

 [ N ]
SS Normal shear force at failure.
= 0
No failure.
> 0
Failure.

(Real)

 [ N ]
N Exponent for the normal force.

(Real)
M Exponent for the shear force.

(Real)

Comments

  1. This keyword maps to spring element (/SPRING) and property (/PROP/TYPE25 (SPR_AXI)) and (/SENSOR/TIME).
  2. The failure is defined with the following expression:
    ( | Normal_force | SN ) N + ( | Shear_force | SS ) M ≥1 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaada WcaaqaamaaemaabaGaamOtaiaad+gacaWGYbGaamyBaiaadggacaWG SbGaai4xaiaadAgacaWGVbGaamOCaiaadogacaWGLbaacaGLhWUaay jcSdaabaGaam4uaiaad6eaaaaacaGLOaGaayzkaaWaaWbaaSqabeaa caWGobaaaOGaey4kaSYaaeWaaeaadaWcaaqaamaaemaabaGaam4uai aadIgacaWGLbGaamyyaiaadkhacaGGFbGaamOzaiaad+gacaWGYbGa am4yaiaadwgaaiaawEa7caGLiWoaaeaacaWGtbGaam4uaaaaaiaawI cacaGLPaaadaahaaWcbeqaaiaad2eaaaGccqGHLjYScaaIXaaaaa@5D66@