Welds - Soldaduras

WELD SIZEThis worksheet is for checking weld sizesWELD OUTLINE CASETable 9-6 from "Mechanical Engineering Design", Shigley, 7th ed., 2004, pg. 479References:Pressure Vessel Handbook, 8th ed, MegyesyMechanical Engineering Design, 7th ed, ShigleySchedule A: Allowable Load for Various Sizes of Fillet WeldsBy:DJY1Strength Level of Weld Metal (EXX)Date:8/4/0860*70*8090*100110*120Job:6093Allowable shear stress on throat, ksi (1000 psi) of fillet weld or partial penetration groove weldDescription of weld:Vaporizer skid cross beam to main welds(tau) =18.021.024.027.030.033.036.02Allowable Unit Force on Fillet Weld, kip/linear inf =12.73h14.85h16.97h19.09h21.21h23.33h25.45hDEFINITION OF SYMBOLSLeg Size w, inAllowable Unit Force for Various Sizes of Fillet Welds kip/linear inAw =Length of weld, in112.7314.8516.9719.0921.2123.3325.45f =Allowable unit force on weld, kip per lin in of weld37/811.1412.9914.8516.7018.5720.4122.27M =Bending moment, kip-in3/49.5511.1412.7314.3215.9217.5019.09l =Bending moment arm length, in5/87.969.2910.6111.9313.2714.5815.91P =Tension or Compression Load1/26.377.428.489.5410.6111.6712.73Sw =Section Modulus of weld lines subjected to bending moment, in^27/165.576.507.428.359.2810.2111.14V =Vertical load for bending and/or shear, kip3/84.775.576.367.167.958.759.54w =Fillet weld leg dimension, in45/163.984.645.305.976.637.297.95Wn =Tensive or compressive force on weld, kip per lineal inch of weld1/43.183.714.244.775.305.836.36Ws =Average vertical shear on fillet weld, kip per lineal inch of weld3/162.392.783.183.583.984.384.77Wb =Bending force on weld, kip per lineal inch of weld1/81.591.862.122.392.652.923.18Wr =Resultant load on fillet weld, kip per lineal inch of weld1/160.800.931.061.191.331.461.59FORMULAS FOR FORCES ON WELD*Fillet welds actually tested by the joint AISC-AWS Task Committee.TENSION OR COMPRESSIONVERTICAL SHEARBENDING5Loading condition listWn =PWs =VWb =MCantileverAwAwSwSchedule B: Minimum Fillet Weld Size, hMid-SpanRESULTANT FORCE: Wr =(Wn2 + Ws2 + Wb2)N/AWeld is adequate & stress ratio = 0.51Material Thickness of Thicker Part Joined, inWeld Size, inWeld Outline Case LookupINPUT6* To 1/4 incl.1/8CaseAwSwWeld Outline Case:5Over 1/4To1/23/16110.0016.67Strength Level of Weld Metal:70*Over 1/2To3/41/4220.0033.33Loading condition for bending, ieCantilever or Mid-Span of Simply Supported BeamMid-SpanOver 3/4To1 1/25/1638.0040.00w =3/8in0Over 1 1/2To2 1/43/8414.00240.74P =12.50kipIf no tension or compression is present, P = 0Over 2 1/4To61/2518.0056.67V =12.50kipIf only tension or compression is present, V = 07Over 65/8624.0042.86b =4inWeld dimension; refer to figure on right728.0073.33d =10inWeld dimension; refer to figure on rightNot to exceed the thickness of the thinner part.831.4278.54l =48inIf bending is not to be considered, l = 0*Minimum size for bridge application does not go below 3/16 in.Aw =18.00inFor minimum fillet weld size, schedule does not go above 5/16 in fillet weld for every 3/4 in material.Sw =56.67in^28M =150lb-inf =5.57kip/lin inCalculating Tensive or Compressive ForceCalculating Shear ForceCalculating Bending ForceCalculating Resultant ForceWn =0.69kip/lin inWs =0.69kip/lin inWb =2.65kip/lin inWr =2.82kip/lin in=P/Aw=V/Aw=M/Sw=SQRT(Wn^2 + Ws^2 + Wb^2)=12.5kip/18lin in=12.5kip/18lin in=150kip-in/56.67in^2=SQRT(0.69^2 + 0.69^2 + 2.65^2)

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