Relaxation of Stress and Density, Strength (Fatigue)

Erscheinungsjahr 2015
ISBN: 978-3-03835-998-2
Verlag: Trans Tech Publications

Buch, Englisch, 206 Seiten, Format (B × H): 170 mm x 240 mm, Gewicht: 510 g

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.

Gräfe, Wolfgang

Fachgebiete

• Technische Wissenschaften Maschinenbau | Werkstoffkunde Technische Mechanik | Werkstoffkunde

Inhaltsverzeichnis

Preface
1. Migration Processes Induced in Solids
2. Stress Relaxation in Glasses
3. Density Relaxations in Glasses
4. The Background of Internal Friction
5. Creep of Steel and the Static Fatigue of Glass
6. The Activation Energy of the Static Fatigue and Creep
7. Fatigue due to an Oscillating Load
8. Statistical Checks of Stromeyer's Fatigue Formula
9. Models for Defect Growth
10. Generalized Laws of Strength Degradation
11. A Compressive Stress Resulting from Tamm's Electronic Surface States
12. Environmental Influences on Fatigue Strength
13. The Activation Energy of Creep and the Surface Energy of Solids
14. Open Questions
A1. Nonlinear Regression
A2. Solutions for the Damped Oscillations 1
A3. Solutions for the Damped Oscillations 2
A4. Harmonics by Stress Relaxation
A5. The Approximate Linearity of Equation (7.9)
A6. A Tube-Like Specimen for Fatigue Tests
A7. Inhomogeneous Heating Caused by Internal Friction
A8. The Partial Differential Equation of the Temperature Field in a Cylinder Caused by Internal Friction
A9. A Hypothetical Specimen for an Easy Assessment of Induced Compressive Stress