Spot (Resistance) Weld Joint Calculation Formulas

One-shear joint loaded with shear

Shear loading of a point

Tear loading of a point along the cylindrical surface

Comparative stress

Meaning of used variables

 

F

acting force [N, lb]

 

d

diameter of spot weld [mm, in]

 

i

number of welds [-]

 

s

plate thickness [mm, in]

  α

conversion factor of weld joint [-]

Double-shear joint loaded with shear

Shear loading of a point

Tear loading of a point along the cylindrical surface

Comparative stress

Meaning of used variables

 

F

acting force [N, lb]

 

d

diameter of spot weld [mm, in]

 

i

number of welds [-]

 

s

plate thickness [mm, in]

  α

conversion factor of weld joint [-]

Spot weld joint loaded with tear-off

Tear-off loading of a point

Comparative stress

Meaning of used variables

 

F

acting force [N, lb]

 

d

diameter of spot weld [mm, in]

 

i

number of welds [-]

 

s

plate thickness [mm, in]

  α

conversion factor of weld joint [-]