Relaxation of Stress and Density, Strength (Fatigue)

Erscheinungsjahr 2015
ISBN: 978-3-03795-997-8
Verlag: Trans Tech Publications

Sonstiges, Englisch, Band Volume 78, 206 Seiten, Format (B × H): 125 mm x 142 mm, Gewicht: 200 g

Reihe: Materials Science Foundations

This treatment of ?Time-Dependent Mechanical Properties of Solids? beginswith a phenomenological description of the transport of some unspecifiedentity. It is assumed that the transport is caused by mechanical stresses ortemperature fields. Using these assumptions, it is possible to deduceformulae for a theoretically based description of several phenomena withoutreferring to any specific process or entity. These theoretical results thenprovide the tools for performing methodologically better scientific work andfor a better analysis of data in the practical application of materials. Bypublishing this work, the author hopes improve technical safety intransportation and other fields of practical materials application. Anothergoal is to stimulate the scientific investigation of a wider range ofsubstances in order to analyze more extensively the elementary processeswhich produce observed phenomena. This second edition is extended andChapter 12, five new Sections as well as the Appendices A7, A8 and A9 areadditionally inserted.

Autoren/Hrsg.

Gr?fe, Wolfgang

Fachgebiete

• Technische Wissenschaften Maschinenbau | Werkstoffkunde Technische Mechanik | Werkstoffkunde

Inhaltsverzeichnis

1. Migration Processes Induced in Solids2. Stress Relaxation in Glasses3. Density Relaxations in Glasses4. The Background of Internal Friction5. Creep of Steel and the Static Fatigue of Glass6. The Activation Energy of the Static Fatigue and Creep7. Fatigue due to an Oscillating Load8. Statistical Checks of Stromeyer's Fatigue Formula9. Models for Defect Growth10. Generalized Laws of Strength Degradation11. A Compressive Stress Resulting from Tamm's Electronic Surface States12. Environmental Influences on Fatigue Strength13. The Activation Energy of Creep and the Surface Energy of Solids14. Open QuestionsA1. Nonlinear RegressionA2. Solutions for the Damped Oscillations 1A3. Solutions for the Damped Oscillations 2A4. Harmonics by Stress RelaxationA5. The Approximate Linearity of Equation (7.9)A6. A Tube-Like Specimen for Fatigue TestsA7. Inhomogeneous Heating Caused by Internal FrictionA8. The Partial Differential Equation of the Temperature Field in a Cylinder Caused by Internal FrictionA9. A Hypothetical Specimen for an Easy Assessment of Induced Compressive Stress