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Lifetime Estimation of Welded Joints

Tadeusz Lagoda (Autor)

Buch | Hardcover

X, 118 Seiten

2008
Springer Berlin (Verlag)
978-3-540-77061-9 (ISBN)

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In the paper the author attempts to assess the fatigue life of chosen welded joints. It focuses especially on chosen problems that accompany deter- nation of the fatigue life of welded joints, taking into consideration the strain energy density parameter. Chapter 2 describes the welded joint as a stress concentrator. The state of stress and strain in the notch are described and theoretical and fatigue coefficients are indicated. The fatigue coef- cient of the notch effect is estimated on the basis of fictitious radius in the notch root. Chapter 3 presents a model of fatigue life assessment under uniaxial stress state with statistical handling of data presented. The new energy model of fatigue life assessment, which rests upon the analysis of stress and strain in the critical plane, is described in detail in chapter 4. The principle of such a description is presented in the uniaxial as well as in - axial state of loading. Chapter 5 contains the analysis of tests of four ma- rials subjected to different loadings: cyclic, variable-amplitude with Ga- sian distribution, and variable amplitude with Gaussian distribution and overloading for symmetric and pulsating loading. The analysis is based on the determined fatigue characteristics for all the considered materials. Chapter 6 shows the application of the model in the fatigue life assessment in the complex state of loading (bending with torsion of flange-tube and tube-tube joints) based on fatigue research of steel and aluminum welded joints carried out in well-known German centres.

Welded Joints as the Stress Concentrator.- The Stress Model for the Assessment of Fatigue Life Under Uniaxial Loading.- The Energy Model of Fatigue Life Assessment.- An Example of Fatigue Life Evaluation Under Simple Loading.- An Example of Fatigue Life Evaluation Under Complex Loading States.- Conclusions.

Erscheint lt. Verlag	17.1.2008
Zusatzinfo	X, 118 p.
Verlagsort	Berlin
Sprache	englisch
Maße	155 x 235 mm
Gewicht	315 g
Themenwelt	Mathematik / Informatik ► Mathematik ► Wahrscheinlichkeit / Kombinatorik
Themenwelt	Technik ► Maschinenbau
Schlagworte	fatigue • joints • life time assessment • Materials • Quality Control, Reliability, Safety and Risk • Schweißen • stain • Stress • Torsion • uniaxial load
ISBN-10	3-540-77061-5 / 3540770615
ISBN-13	978-3-540-77061-9 / 9783540770619
Zustand	Neuware