Direct load · throat area · arc energy

Fillet weld & heat-input

Inputs

Equal fillet leg sizeaNominal equal-leg fillet dimension for this direct-load screen.

Effective weld lengthLUser-entered effective length per weld line; end returns are not inferred.

Number of weld linesn—User-entered effective parallel fillet-weld line count for equal direct-load sharing.

Direct applied forceFStated direct force only; no eccentricity or moment distribution is modeled.

User-stated allowable shearτallowUser-entered allowable basis; this screen does not select consumables or code values.

Arc voltageVUser-entered arc voltage for electrical heat-input arithmetic.

Arc currentIUser-entered arc current for electrical heat-input arithmetic.

Travel speedvUser-entered travel speed for heat input per weld length.

User-stated arc efficiencyη%User-entered 0–100% thermal-efficiency factor; no process value is selected.

Results

Effective throat thickness

4.242

Effective throat area

848.4

Direct throat shear stress

58.934

Required leg at stated allowable

2.4387

Electrical heat input

0.6912

kJ/mm

t = 0.707a; Aeff = 0.707aLn; τ = F/Aeff; amin = F/(0.707Lτallow n); HI = VI·60·η/(1000v)

A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.

Calculation snapshot

Fillet weld & heat-input

Formula version 2.0.0

Conditions

Equal fillet leg size	6
Effective weld length	100
Number of weld lines	2
Direct applied force	50000
User-stated allowable shear	145
Arc voltage	24
Arc current	180
Travel speed	300
User-stated arc efficiency	80

Calculated response

Effective throat thickness	4.242 mm
Effective throat area	848.4 mm²
Direct throat shear stress	58.934 MPa
Required leg at stated allowable	2.4387 mm
Electrical heat input	0.6912 kJ/mm

Method

t = 0.707a · Aeff = 0.707aLn · τ = F/Aeff · amin = F/(0.707Lτallow n) · HI = VI·60·η/(1000v)

Source

Shigley's Mechanical Engineering Design — fillet-weld throat and stress analysis:

Boundaries

Equal-leg fillet geometry
Direct static force only
User-entered allowable
Electrical heat-input arithmetic

This printout is a record of displayed inputs and deterministic formula output. It is not an approval, certification, or engineering conclusion.

Nearby: Milling removal rate · Drilling speed & time · Turning material removal · Milling cutting parameters

Method

Formula, when it applies, and when it does not

Calculate equal-leg fillet throat, effective area, direct stress, required leg, and electrical heat input from welding conditions.

t = 0.707a; Aeff = 0.707aLn; τ = F/Aeff; amin = F/(0.707Lτallow n); HI = VI·60·η/(1000v)

When

Equal-leg fillet geometry
Direct static force only
Electrical heat-input arithmetic

Don’t

This is equal-leg fillet-weld direct-load arithmetic with user-entered allowable, plus electrical heat input from user-entered arc settings. It excludes weld group eccentricity, bending/torsion, nonuniform load sharing, longitudinal/transverse direction effects, fatigue, residual stress, discontinuities, base-metal failure, electrode/process selection, code provisions, weld procedure qualification, heat-affected-zone effects, distortion, preheat/interpass control, inspection, and compliance.

Shigley's Mechanical Engineering Design — fillet-weld throat and stress analysis