seam weld fatigue analysis femfat.pdf

Created: 03/29/2003Ajay Vittalam - DaimlerChrysler (SVPT/CAE) Dietmar Peiskammer - Magna Steyr (FEMFAT) Darryl Taylor DaimlerChrysler (Stress Lab)

1

SEAM Weld Fatigue Analysis - FEMFAT


2


Unknowns:

Type of loading (Alternate or Pulsating).

Type of seam welding (HV or T Weld).

HV Weld welded through the materialT Weld welded on one side (outside)


3



4


HV WeldWelded through the material

T WeldWelded on one side (outside)


5

A A

A

AMAT214

MAT216

MAT218

A Direction of element normals


HV - Weld


6


A A

A

AMAT202

MAT204

MAT206

T - Weld

A Direction of element normals


7

A

A

A

A

A Set C102End nodes of weld

Rest of the highlightedNodes in Set C100



8


+4000

0

Pulsating Load

+4000

-4000

Alternating Load

0


9


HV Weld - Alternating Load


10


HV Weld - Pulsating Load


11


T Weld - Alternating Load


12


T Weld - Pulsating Load


13

Radius of Weld2142244,0004.069E-06Pulsating

Radius of Weld214216,4006.115E-05Alternating

T

Radius of Weld23179,870,0001.628E-06Pulsating

Radius of Weld2317245,7002.342E-05Alternating

HV

LocationNodeLifeDamageLoadingType of weld



14

Conclusions:

Simple modeling of boundary and loading conditionswere used to predict the fatigue life of the seam weld.

Very sensitive to boundary conditions.

Type of seam welding affects the results.

Maximum damage is observed at the radius of the weldthe seam weld ends are also highly damaged.



15

Back Up Slides


16



17

End of T-Seam

(Bottom)1320406,0002.464E-06Pulsating

Radius of Weld214129,2003.425E-05AlternatingT

Boundary Condition II

Radius of WeldPulsating

Radius of WeldAlternatingHV

Boundary Condition II

LocationNodeLifeDamageLoadingType of weld

6.082E-06

1.369E-07

164,000

7,300,600

2141

2317


Documents

seam weld fatigue analysis femfat.pdf