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Overlapping Plate Welds

lpc 1

Axial Force on PJP Fillet Weld, 2 Plates  formula

  • Partial Joint Penetration  -  Weld fills a portion of the gap between the two pieces.
\( \sigma =  \dfrac{ 1.414 \cdot P }{ \left( t_1 + t_2  \right) \cdot L  }    \) 
Symbol English Metric
\(\large{ \sigma }\) (Greek symbol sigma) = stress in weld \(lbf\;/\;in^2\) \(Pa\)
\(\large{ L }\) = length of weld \(in\) \(mm\)
\(\large{ t }\) = plate thickness / weld thickness \(in\)  \(mm\)
\(\large{ P }\) = total axial force \(lbf\) \(N\)

      

lpc 4

Axial Force on PJP Fillet Weld, 2 Plates Formula

  • Partial Joint Penetration  -  Weld fills a portion of the gap between the two pieces.
\( \sigma =  \dfrac{ 0.707 \cdot P }{ t \cdot l }    \) 
Symbol English Metric
\(\large{ \sigma }\) (Greek symbol sigma) = stress in weld \(lbf\;/\;in^2\) \(Pa\)
\(\large{ L }\) = length of weld \(in\)  \(mm\) 
\(\large{ t }\) = plate thickness / weld thickness \(in\) \(mm\)
\(\large{ P }\) = total axial force \(lbf\) \(N\)

       

lpc 2

Axial Force on PJP Fillet Weld, 2 Plates, Weld 3 formula

  • Partial Joint Penetration  -  Weld fills a portion of the gap between the two pieces.
\( \sigma =  \dfrac{ 0.707 \cdot P }{ t \cdot l }    \) 
Symbol English Metric
\(\large{ \sigma }\) (Greek symbol sigma) = stress in weld \(lbf\;/\;in^2\) \(Pa\)
\(\large{ l }\) = length of weld \(in\) \(mm\)
\(\large{ t }\) = weld throat thickness \(in\) \(mm\)
\(\large{ P }\) = total axial force \(lbf\) \(N\)

        

lpc 5

Axial Force on PJP Fillet Weld, 2 plates, Weld 2 formula

  • Partial Joint Penetration  -  Weld fills a portion of the gap between the two pieces.
\( \sigma =  \dfrac{ 0.707 \cdot P }{ t \cdot l }    \) 
Symbol English Metric
\(\large{ \sigma }\) (Greek symbol sigma) = stress in weld \(lbf\;/\;in^2\) \(Pa\)
\(\large{ l }\) = length of weld \(in\) \(mm\)
\(\large{ t }\) = weld throat thickness \(in\)  \(mm\) 
\(\large{ P }\) = total axial force \(lbf\)  \(N\) 

     

lpc 3

Axial Force on PJP Fillet Weld, 3 Plates formula

  • Partial Joint Penetration  -  Weld fills a portion of the gap between the two pieces.
\( \sigma =  \dfrac{ 0.707 \cdot P }{ t \cdot L }    \) 
Symbol English Metric
\(\large{ \sigma }\) (Greek symbol sigma) = stress in weld \(lbf\;/\;in^2\) \(Pa\)
\(\large{ L }\) = length of weld \(in\) \(mm\) 
\(\large{ t }\) = weld throat thickness \(in\) \(mm\) 
\(\large{ P }\) = total axial force \(lbf\) \(N\)

         

lpc 6

Axial Force on PJP Fillet Weld, 2 Plates formulas

  • Partial Joint Penetration  -  Weld fills a portion of the gap between the two pieces.

\( \sigma =  \dfrac{ 1.414 \cdot P }{ \left( t_1 + t_2  \right) \cdot L     }    \)     (Weld A)

\( \sigma =  \dfrac{ 1.414 \cdot P \cdot t_2 }{ \left( t_1 + t_2  \right) \cdot t_3 \cdot L     }    \)     (Weld B)
Symbol English Metric
\(\large{ \sigma }\) (Greek symbol sigma) = stress in weld \(lbf\;/\;in^2\) \(Pa\)
\(\large{ L }\) = length of weld \(in\)  \(mm\)
\(\large{ t_1 }\) = plate thickness  \(in\) \(mm\)
\(\large{ t_2 }\) = plate fhickness \(in\)  \(mm\) 
\(\large{ t_3 }\) = weld throat thickness \(in\)  \(mm\) 
\(\large{ P }\) = total axial force \(lbf\) \(N\)

           

lpc 7

Axial Force on PJP Fillet Weld, 3 Plates formula

  • Partial Joint Penetration  -  Weld fills a portion of the gap between the two pieces.
\( \sigma =  \dfrac{ 0.354 \cdot P }{ t \cdot l }    \) 
Symbol English Metric
\(\large{ \sigma }\) (Greek symbol sigma) = stress in weld \(lbf\;/\;in^2\) \(Pa\)
\(\large{ l }\) = length of weld \(in\)  \(mm\)
\(\large{ t }\) = weld throat thickness \(in\)  \(mm\) 
\(\large{ P }\) = total axial force \(lbf\) \(N\)

 

lpc 8

Axial Force on PJP Fillet Weld, 3 Plates formulas

  • Partial Joint Penetration  -  Weld fills a portion of the gap between the two pieces.

\( \sigma =  \dfrac{ 1.414 \cdot P }{  2 \cdot t \cdot l + t_1 \cdot L    }    \)     (Fillet Weld)

\( \sigma =  \dfrac{ P }{  2 \cdot t \cdot l + t_1 \cdot L   }    \)     (Butt Weld)
Symbol English Metric
\(\large{ \sigma }\) (Greek symbol sigma) = stress in weld \(lbf\;/\;in^2\) \(Pa\)
\(\large{ l }\) = length of top plate weld \(in\) \(mm\) 
\(\large{ L }\) = length of bottom plate weld \(in\)  \(mm\)
\(\large{ t }\) = top plate thickness \(in\) \(mm\) 
\(\large{ t_1 }\) = bottom plate fhickness \(in\)  \(mm\)
\(\large{ P }\) = total axial force \(lbf\) \(N\)

 

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