Shrinkage Model for Welding Distortion

Tested with CGX 2.19/ CCX 2.19

Assembly with *tie or *contact pair connections. Contact version is selected via parameter contact in pre.fbd.par.
Thermal strain with prescribed temperature
Symmetry expansion in post-processing

File	Contents
par.pre.fbd	Pre-processing with CGX (param.py source file)
post.fbd	Post-processing with CGX
pc-ss.inc	CCX surface-to-surface penalty contact definition
tie.inc	CCX MPC contact definition with `*tie`
Tjoint.inp	CCX input
test.py	Python script to run both contact versions

Preprocessing

Three separate parts are generated. The following parameters are defined in pre.fbd.par

Parameter	Value	Meaning
`tf`	10	flange thickness in mm
`bf`	100	flange width in mm
`length`	500	length in mm
`tw`	10	web thickness in mm
`hw`	100	web height in mm
`a`	7	seam thickness in mm
`dls`	25	seam offset in mm
`contact`	"pc-ss"	contact version: "pc-ss" (penalty, surface to surface) or "tie" (MPC contact)

Create the file pre.fbd and run the pre-processing

> param.py pre.fbd.par
> cgx -b pre.fbd

Parts and contact surfaces:

Point for y-constraint and planes of symmetry:

ccx Tjoint

cgx -b post.fbd

Penalty contact is less rigid than MPC contact, thus the maximum equivalent stress for MPC contact is higher.

Vertical displacement