Annex C Residual Stress Profiles

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FITNET FFS –MK7 – Annex CC.1 SymbolsWithin this section, the following symbols are used with the dimensions specified below.Q ~qRrWeld pass heat input into workpiece per unit length per unit thickness,Weld torch arc power (current x closed circuit voltage) J/secMean radius of pipe (or radius of chord for Pipe T-Butt), mmRadius of brace in pipe T-Butt, mmQ ~ = η[(q /2v) / t],J / mmr0Dimensions of the yield zone for a thin plate, mmTtvWPlate (or chord) thickness for T weld joint, mmPlate or pipe thickness (or thickness of brace for Pipe T-Butt), mmWeld torch advance rate, mm/secWidth of the weld at surface, mmy0Dimensions of the yield zone for a thick plate, mmzPosition through-thickness, mmzrDepth of a repair weld, mmz0Size of yield zone below repair weld, mmδ Heat input sinusoid correlation factor for pipe butt weld Level 3 longitudinal stressϕηθHeat input bending correlation factor for pipe butt weld Level 3 transverse stressWeld process efficiencyHeat input sinusoid correlation factor for pipe butt weld Level 3 transverse stressσyTypical 1 room temperature yield strength of material, MPa. For austenitic material, the typical 1%proof stress should be used. For ferritic material the typical yield point or typical 0.2% proof stress isappropriateσ Lower of , σ ),*y(yp ywσ MPa+σ yGreater of (yp,σyw),σ MPaσypParent metal typical yield strength, MPaσywWeld metal typical yield strength, MPaLσRLongitudinal residual stress, MPaL,OσRLongitudinal residual stress at outer surface, MPa1 Typical rather than lower bound room temperature yield strength properties should be used. A typical value is defined tobe a mean estimate of the yield strength, as used to construct the failure assessment diagram.Annex C.2© FITNET 2006 – All rights reserved
(01 May 2006) FITNET MK7L,BσRLongitudinal residual stress at bore surface, MPaTσRTransverse residual stress, MPaT,OσRTransverse residual stress at outer surface, MPaT,BσRTransverse residual stress at bore surface, MPa© FITNET 2006 – All rights reserved Annex C.3
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Page 5 and 6: (01 May 2006) FITNET MK7C.3 Stress
Page 7 and 8: (01 May 2006) FITNET MK7r0and0(i.e.
Page 9 and 10: (01 May 2006) FITNET MK7z = distanc
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Page 15 and 16: (01 May 2006) FITNET MK7Table C. 1
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Page 33 and 34: (01 May 2006) FITNET MK7K is define
Page 35 and 36: (01 May 2006) FITNET MK7Longitudina
Page 37 and 38: (01 May 2006) FITNET MK7Janosch, J
Page 39 and 40: (01 May 2006) FITNET MK7Stout, R D,
Page 41 and 42: (01 May 2006) FITNET MK7Coleman, M
Page 43 and 44: (01 May 2006) FITNET MK7Leggatt, R
Page 45 and 46: (01 May 2006) FITNET MK7Mohr, W C,
Page 47 and 48: (01 May 2006) FITNET MK7Fidler, R,
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(01 May 2006) FITNET MK7C.15.2 Lase
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(01 May 2006) FITNET MK7Through thi
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(01 May 2006) FITNET MK7Mises stres
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(01 May 2006) FITNET MK7Mises stres
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(01 May 2006) FITNET MK7Elastic str
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