SEAM Weld Fatigue Analysis - FEMFAT

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

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SEAM Weld Fatigue Analysis - FEMFAT


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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)


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HV – WeldWelded through the material

T – WeldWelded on one side (outside)


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A A

A

AMAT214

MAT216

MAT218

A – Direction of element normals


HV - Weld


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A A

A

AMAT202

MAT204

MAT206

T - Weld

A – Direction of element normals


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A

A

A

A

A – Set C102End nodes of weld

Rest of the highlightedNodes in Set C100



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+4000

0

Pulsating Load

+4000

-4000

Alternating Load

0


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HV Weld - Alternating Load


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HV Weld - Pulsating Load


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T Weld - Alternating Load


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T Weld - Pulsating Load


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Radius of Weld2142244,0004.069E-06Pulsating

Radius of Weld214216,4006.115E-05Alternating

T

Radius of Weld23179,870,0001.628E-06Pulsating


HV

LocationNodeLifeDamageLoadingType of weld



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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.



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Back Up Slides


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End of T-Seam

(Bottom)1320406,0002.464E-06Pulsating


TBoundary

Condition II

Radius of WeldPulsating

Radius of WeldAlternating

HVBoundary

Condition II

LocationNodeLifeDamageLoadingType of weld

6.082E-06

1.369E-07

164,000

7,300,600

2141

2317


Documents

SEAM Weld Fatigue Analysis - FEMFAT