Introduction

*CONSTRAINED_GENERALIZED_WELD
Two Plates Connected With Butt Welds
LS-DYNA Manual Section: *CONSTRAINED_GENERALIZED_WELD

Additional Sections:
*DATABASE_CROSS_SECTION_PLANE

Example: Two Plates Connected with Butt Welds

Filename: constrained.butt-weld.k

Description:
Two plates are connected by four butt welds. The plates are pulled apart and
the center two welds fail.

Model:
Each plate is constructed with 12 shell elements. One end of one plate is
fixed with SPC's. One end of the other plate has a prescribed motion condition
defined. The other ends of the plates are butt welded together with failure
criteria. Cross sections are defined through each plate to monitor the forces
through the plates as they are pulled apart.

results:
butt weld constraint failed between nodes 35 & 23
: Time = 1.26913E+00 : xl-force = 5.56053E+00
: yl-force = 2.28915E-03 : zl-force = -1.93680E-07
: xl-moment = -3.16675E-07 : yl-moment = 9.09511E-07
: plastic ep= 0.00000E+00

Stresses in weld:
: signn = 2.78026E-01 : tautn = 0.00000E+00
: signm = 9.09511E-08 : tautm = 0.00000E+00
: signs = 0.00000E+00 : tauts = 1.14458E-04
: tautw = -9.68398E-09

butt weld constraint failed between nodes 37 & 25
: Time = 1.26913E+00 : xl-force = 5.56054E+00
: yl-force = -2.29328E-03 : zl-force = -2.41027E-07
: xl-moment = 2.97763E-07 : yl-moment = 3.22515E-07
: plastic ep= 0.00000E+00

Stresses in weld:
: signn = 2.78027E-01 : tautn = 0.00000E+00
: signm = 3.22515E-08 : tautm = 0.00000E+00
: signs = 0.00000E+00 : tauts = -1.14664E-04
: tautw = -1.20514E-08