E-Book, Englisch, 378 Seiten
Reihe: Woodhead Publishing Series in Welding and Other Joining Technologies
Radaj Design and Analysis of Fatigue Resistant Welded Structures
1. Auflage 1990
ISBN: 978-1-84569-875-1
Verlag: Elsevier Science & Techn.
Format: EPUB
Kopierschutz: 6 - ePub Watermark
E-Book, Englisch, 378 Seiten
Reihe: Woodhead Publishing Series in Welding and Other Joining Technologies
ISBN: 978-1-84569-875-1
Verlag: Elsevier Science & Techn.
Format: EPUB
Kopierschutz: 6 - ePub Watermark
An English version of a sucessful German book. Both traditional and modern concepts are described.
Autoren/Hrsg.
Weitere Infos & Material
1;Front Cover;1
2;Design and Analysis of Fatigue Resistant Welded Structures;4
3;Copyright Page;5
4;Table of Contents;6
5;Preface;10
6;List of symbols;12
7;Chapter 1. Introduction;20
7.1;1.1 The phenomenon of fatigue;20
7.2;1.2 Basic tests;21
7.3;1.3 Terms and definitions;23
7.4;1.4 Fatigue strength of unwelded material;24
7.5;1.5 Methodological aspects and stress assessments;31
7.6;1.6 Nominal stress assessment for fatigue resistant joints;33
7.7;1.7 General references to relevant literature;35
8;Chapter 2. Fatigue strength for infinite life of welded joints in structural steel;37
8.1;2.1 Simply loaded joints;37
8.2;2.2 Multiply loaded joints;60
8.3;2.3 Influence of mean stress;61
9;Chapter 3. Fatigue strength for finite life and service fatigue strength of welded joints;67
9.1;3.1 Fatigue strength dependent on number of cycles;67
9.2;3.2 Load spectra;75
9.3;3.3 Fatigue strength with load spectra;83
9.4;3.4 Manufacturing measures for increasing fatigue strength;90
10;Chapter 4. Fatigue strength of welded joints in high tensile steels and aluminium alloys;99
10.1;4.1 Welded joints in high tensile steels;99
10.2;4.2 Welded joints in aluminium alloys;102
11;Chapter 5. Fatigue strength of welded components, design improvements;106
11.1;5.1 General aspects and welded components in structural steel engineering (bar structures);106
11.2;5.2 Welded components in shipbuilding (bar to plate structures);128
11.3;5.3 Welded components in tank, boiler and pipeline construction (circular shell and plate structures);137
11.4;5.4 Appropriate design with regard to fatigue strength;151
12;Chapter 6. Fatigue strength of spot, friction, flash butt and stud welded joints;154
12.1;6.1 Spot welded joints;154
12.2;6.2 Weldbonded joints;161
12.3;6.3 Friction welded and flash butt welded joints;162
12.4;6.4 Stud welded joints;162
13;Chapter 7. Design codes, assessment of nominal and structural stress;164
13.1;7.1 Codes based on science, empirical knowledge and tradition;164
13.2;7.2 Dimensioning for fatigue in accordance with the codes, assessment of nominal stress;165
13.3;7.3 Survey of the design codes;167
13.4;7.4 Design loads, load spectra, loading classes;169
13.5;7.5 Notch classes and quality of manufacture;173
13.6;7.6 Permissible stress, safety factor, multiaxiality hypothesis;190
13.7;7.7 Assessment of structural stress;201
14;Chapter 8. Notch stress approach for assessment of fatigue strength of seam welded joints;209
14.1;8.1 General fundamentals of the method;209
14.2;8.2 Elastic notch effect of welded joints with regard to fatigue strength for infinite life;215
14.3;8.3 Elastic-plastic notch effect of welded joints with regard to fatigue strength for finite life and service fatigue strength;263
15;Chapter 9. Fracture mechanics approach for assessment of fatigue strength of seam welded joints;278
15.1;9.1 Principles of the approach;278
15.2;9.2 Crack propagation equations;280
15.3;9.3 Input parameters of the fracture mechanical strength or life evaluation for welded joints;288
15.4;9.4 Application for assessment of fatigue strength for finite and infinite life;294
15.5;9.5 Application for assessment of safety, residual life, fitness-for-purpose and back-tracing of failures;296
16;Chapter 10. Structural stress, notch stress and stress intensity approach for assessment of fatigue strength of spot welded joints;300
16.1;10.1 Development status of local approaches;300
16.2;10.2 Basic loading modes at weld spot;301
16.3;10.3 Elementary mechanics of tensile shear and cross tension loading;303
16.4;10.4 Structural stresses at weld spot;306
16.5;10.5 Notch stresses at weld spot;309
16.6;10.6 Stress intensity factors at weld spot;312
16.7;10.7 Local stress parameters for common weld spot specimens;315
16.8;10.8 Assessment of load carrying capacity of weld spots in structural components;323
16.9;10.9 Effect of residual stresses and hardness distribution;325
16.10;10.10 Large deflections and buckling;328
16.11;10.11 Crack initiation with local yielding and crack propagation;332
16.12;10.12 Local fatigue strength of weld spot;334
16.13;10.13 Combination of spot welding and bonding;342
17;Chapter 11. Corrosion and wear resistance of welded joints;344
17.1;11.1 General aspects;344
17.2;11.2 Corrosion resistance;344
17.3;11.3 Wear resistance;348
18;Chapter 12. Example for the development of a fatigue resistant welded structure;350
18.1;12.1 Introduction, general outline, requirements;350
18.2;12.2 Development procedure, numerical and experimental simulation;351
19;Bibliography;357
20;Index;376
List of symbols
The list of symbols used in equations, figures and text is arranged first according to the Latin and then according to the Greek alphabet. The upper case letter is always quoted first, the lower case second. Within each letter group, quantities with the same dimensions are arranged consecutively.
A uniform and unique notation, which is additionally comprehensible to the English reader, could not always be introduced because of different habits in the different fields of engineering science compiled here in one book. Some symbols are multiply assigned if mistaken usage can be excluded. The symbols with multiple assignments are listed separately if the meaning is quite different and in the same line if the meaning is similar.
The former notations sY, s0.1, sU are retained instead of using the newer standard notations Re, Rp0.1, Rm because they are consistent with the stress symbols and are therefore more descriptive.
It is not possible to list the symbols with every combination of subscripts occurring in the text.
| A11, A12, A22, A33 | (-) | Material constants in equation (182) |
| A, A0, AU | (mm2) | Area of cross section, initially and at rupture |
| A* | (mm2) | Area circumscribed by hollow section |
| a | (mm) | Thickness of fillet weld |
| a, ai, a0 | (mm) | Crack length or depth, slit length, initial crack length or depth |
| a | (mm) | Distance from weld toe (Fig.157) |
| b, bf | (mm) | Specimen width, width between webs, flange width |
| b | (-) | Fatigue strength exponent in equation (108) |
| b1, b2, b3 | (mm) | Distance from weld toe (Fig.157) |
| C, C, C0 | (N, mm) | Material constants for crack propagation |
| C | (-) | Neuber constant (Fig.215) |
| c | (mm) | Crack width |
| c | (mm) | Leg width of fillet weld |
| c | (-) | Cyclic ductility exponent in equation (108) |
| c, c?, c|| | (-) | Notch loading coefficients in equations (77), (78), (79) |
| D | (mm) | Diameter of chord tube |
| D | (mm) | Diameter of circular plate |
| d | (mm) | Diameter of weld spot |
| d | (mm) | Diameter of brace tube, of pipe, hole, vessel |
| d1 | (mm) | Diameter of nozzle pipe |
| dA, dE, dN, dHAZ | (mm) | Diameter of adhesive face, electrode, nugget, heat affected zone |
| ?d | (mm) | Local diameter deviation |
| E | (N/mm2) | Elastic modulus |
| Ep, Ec | (N/mm2) | Elastic modulus of plate and of core |
| e | (mm) | Eccentricity of centre line |
| e | (-) | Euler number, 2.7183 |
| F | (N) | Force (tensile or compressive) |
| F' | (N) | Running-through tension force |
| F||, F? | (N) | Tensile shear force, cross tension force |
| ?F, ?Ff | (N) | Shear force range, the same as endurance limit |
| Ff, Fcr | (N) | Spring force, buckling force |
| FA, FAF | (N) | Endurable shear force amplitude for finite and infinite life |
| f | (-) | Function according to equation (25) |
| f | (-) | Force ratio F/Fcr |
| fk, fk0 | (-) | Notch factor, surface factor |
| Fk1, fk2, fk3 | (-) | Weld correction factors in code |
| fkl | (-) | Function in equation (159) |
| fT, fm | (-) | Temperature factor, mean stress factor |
| G | (mm) | Gap between brace tubes (Fig.105) |
| Hi | (-) | Frequency on stress level, i |
| H | (mm) | Height of girder, double bottom, vessel end, tie |
| I | (-) | Irregularity factor |
| I | (-) | Number of load or stress level |
| ?J, ?Jen | (N/mm3/2) | J-integral, endurable J-integral |
| j | (-) | Number of load or stress level |
| K | (-) | Stress concentration factor |
| Kk, Knk | (-) | Notch stress concentration factor referring to sn and sns |
| Ks, Kns | (-) | Structural stress concentration factor referring to sn and sns |
| Kf, ¯f | (-) | Fatigue notch factor referring to sn and ¯n |
| Kkeq | (-) | Equivalent notch stress concentration factor |
| Ks0,Kcw, Kch | (-) | Structural stress concentration factors (equations (32), (33)) |
| Ksl | (-) | Structural stress concentration factor at lower notch |
| Ksa, Ksb, Kst | (-) | Structural stress concentration factors (equation (45)) |
| K0.2* | (N/mm2) | Shape dependent strain limit |
| K' | (N/mm2) | Cyclic hardening modulus |
| Kk* | (-) | Corrected notch stress concentration factor |
| Kk1, Kk2, Kkeq | (-) | Notch stress concentration factors for skl, sk2, skeq |
| Kk ?, Kk|| | (-) | Notch stress concentration factors referring to s? or t|| |
| Ks, Ke | (-) | Stress and strain concentration in elastic–plastic notch root |
| Ks1, Ks2 | (-) | Structural stress concentration factors for ss1, ss2 |
| KU | (-) | Ultimate load stress concentration factor |
| KI, KII, KIII | (N/mm3/2) | Stress intensity factors, mode I, II, III |
| Keq | (N/mm3/2) | Equivalent stress intensity factor |
| ?K, ?KJ | (N/mm3/2) | Stress intensity range, the same derived from ?J |
| ?Kth, ?Kth0 | (N/mm3/2) | Threshold stress intensity range, the same for R = 0 |
| ?KI en | (N/mm3/2) | Endurahle stress intensity factor |
| Ku,Kl | (N/mm3/2) | Upper and lower stress intensity |
| Klc, Kc | (N/mm3/2) | Critical stress intensity factors, fracture toughness |
| k | (-) | Gradient exponent of S-N curve |
| k | (-) | Gradient exponent of life curve |
| k | (-) | Factor in equation (31) |
| k | (N/mm) | Spring constant |
| L | (mm) | Length of chord |
| l0 | (mm) | Distance to zero crossing point of residual stress |
| l, l0, lU | (mm) | Specimen length, initially and at rupture |
| ?1 | (mm) | Increment of specimen length |
| lf | (mm) | Support spacing of flange |
| ls | (mm) | Weld spot pitch |
| Mb | (Nmm) | Bending moment |
| Mb' | (Nmm) | Running-through bending moment |
| Mt | (Nmm) | Torsional moment |
| Mme | (N) | Meridional bending moment per length unit |
| M | (-) | Constraint factor |
| m | (-) | Number of half waves |
| m | (-) | Exponent of crack propagation... |
