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أخوانى فى الله أحضرت لكم كتاب
Fatigue of Structures and Materials
ويتناول الموضوعات الأتية :
Symbols, Acronyms and Units xix Introduction to Fatigue of Structures and Materials References Part I Fatigue under Constant-Amplitude Loading (Chapters –) Fatigue as a Phenomenon in the Material Introduction Different phases of the fatigue life Crack initiation Crack growth The fatigue mechanism in more detail Crystallographic aspects Crack initiation at inclusions Small cracks, crack growth barriers, thresholds Number of crack nuclei Surface effects Crack growth and striations Environmental effects Cyclic tension and cyclic torsion Characteristic features of fatigue failures Microscopic characteristics Macroscopic characteristics Main topics of the present chapter References Stress Concentration at Notches Introduction Definition of Kt Contents Analytical calculations on stress concentrations Effect of the notch geometry on Kt Some additional aspects of stress concentrations Superposition of notches Methods for the determination of stress concentrations Main topics of the present chapter References Residual Stress Introduction Different sources of residual stresses Measurements or calculations of residual stresses Estimation of the residual stress at a notch after a high load How to remove residual stresses Main topics of the present chapter References Stress Intensity Factors of Cracks Introduction Different types of cracks Definition of the stress intensity factor Examples of stress intensity factors K factors obtained by superposition Cracks with curved crack fronts Crack opening and the state of stress Crack tip plasticity Some energy considerations Determination of stress intensity factors The similarity concept and the application of the stress intensity factor K Main topics of the present chapter References Fatigue Properties Introduction Description of fatigue properties of unnotched material Some general aspects of the fatigue strength of unnotched specimens Relation between Sf and SU Mean stress effects Contents xiii The size effect for unnotched specimens Type of loading, tension, bending, torsion Combined loading Low-cycle fatigue Main topics of the present chapter References The Fatigue Strength of Notched Specimens Introduction The fatigue limit of notched specimens at Sm = The similarity principle and the notch sensitivity The size effect on the fatigue limit of notched specimens The fatigue limit of notched specimens for Sm > Notch effect under cyclic torsion Notch effect on the fatigue limit for combined loading cases Significance of the surface finish Discussion on predictions of the fatigue limit The S-N curves of notched specimens The major topics of the present chapter References Fatigue Crack Growth Analysis and Predictions Introduction Description of fatigue crack growth properties Test results The stress intensity factor and the similarity concept Constant-K tests Fatigue crack growth regions Crack closure Plasticity induced crack closure and Keff Plane strain/plane stress Thickness effect on fatigue crack growth Other crack closure mechanisms Crack growth data of different materials Prediction of fatigue crack growth Some basic aspects Crack growth predictions for through cracks Crack growth prediction for part through cracks A final comment xiv Contents Major topics of the present chapter References Part II Load Spectra and Fatigue under Variable-Amplitude Loading (Chapters –) Load Spectra Introduction Different types of loads on a structure in service Description of load histories Determination of load spectra The qualitative approach The quantitative approach Service-simulation fatigue tests and load spectra Major aspects of the present chapter References Fatigue under Variable-Amplitude Loading Introduction TheMiner rule Effect of load cycles with stress amplitudes below the fatigue limit Effect of notch root plasticity Crack length at failure What is basically wrong with theMiner rule? Results of fatigue tests under VA loading Alternative fatigue life prediction methods for VA loading Damage calculations and extrapolation of S-N curves below the fatigue limit The relativeMiner rule Strain history prediction model Predictions based on service-simulation fatigue tests Discussion of fatigue life predictions for VA loading Life estimates for a specific component and the Miner rule Considerations on the effect of the design stress level Comparison between different options for design improvements Comparison of different load spectra Contents xv Major topics of the present chapter References Fatigue Crack Growth under Variable-Amplitude Loading Introduction Crack growth under simple VA-stress histories Crack growth under complex VA-stress histories Crack growth prediction models for VA loading Non-interaction model Interaction models for prediction of fatigue crack growth under VA loading Evaluation of prediction methods for fatigue crack growth under VA-load histories Major topics of the present chapter References Part III Fatigue Tests and Scatter (Chapters and ) Fatigue and Scatter Introduction Sources of scatter Description of scatter Some practical aspects of scatter Major topics of the present chapter References Fatigue Tests Introduction Purposes of fatigue test programs Specimens Fatigue test procedures Reporting about fatigue test results Aspects of crack growth measurements Main topics of this chapter References xvi Contents Part IV Special Fatigue Conditions (Chapters –) Surface Treatments Introduction Aspects of surface treatments Some practical aspects of surface treatments Summary of major topics of the present chapter References Fretting Corrosion Introduction The fretting corrosion mechanism Effects on fretting corrosion Methods to avoid fretting corrosion problems Topics of the present chapter References Corrosion Fatigue Introduction Aspects of corrosion fatigue Corrosion fatigue in gaseous environments Corrosion fatigue in liquid environments Practical aspects of corrosion fatigue A case history Topics of the present chapter References High-Temperature and Low-Temperature Fatigue Introduction Two examples of high-temperature fatigue Fatigue properties at high temperatures Fatigue at low temperatures Some general comments References Contents xvii Part V Fatigue of Joints and Structures (Chapters –) Fatigue of Joints Introduction Fatigue of lugs Symmetric butt joints with rows of bolts or rivets Bolts loaded in tension Riveted and bolted joints with eccentricities Adhesive-bonded joints General discussion on predictions of fatigue properties of joints Major topics of the present chapter References Fatigue of Welded Joints Introduction Some general aspects Geometry aspects of welds Fatigue life considerations for CA loading Fatigue endurances of welded joints under VA loading Two special cases Spot welded joints Major topics of the present chapter References Designing against Fatigue of Structures Introduction Different types of structural fatigue problems Designing against fatigue Uncertainties, scatter and safety margins Uncertainties Scatter and safety factors Some case histories Improved shoulder fillets Secondary bending introduced by non-symmetric hole reinforcements Cracked aircraft wing panel repaired with a poorly designed patch xviii Contents Online structural health monitoring of the Tsing Ma Bridge Summarizing conclusions References Part VI Fatigue Resistance of Fiber-Metal Laminates (Chapter ) Fatigue Resistance of Fiber-Metal Laminates Introduction Laminated sheet material without fibers Fiber-metal laminates Arall and Glare The fiber-metal laminate concept Fiber-metal laminates as sheet material Crack growth in Glare Fatigue properties of Glare components More about Glare Some typical properties of Glare Production and design aspects of Glare structures Some summarizing remarks References Index
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عدد المساهمات : 18928 التقييم : 35294 تاريخ التسجيل : 01/07/2009 الدولة : مصر العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى
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عدد المساهمات : 18928 التقييم : 35294 تاريخ التسجيل : 01/07/2009 الدولة : مصر العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى
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