This book elucidates the correlation of fatigue crack growth data to multiscale cracking, particularly to the understanding of micrographs influenced by mechanical disturbance and thermodynamic variables.
What can be added to the fracture mechanics of metal fatigue that has not already been said since the 1900s? From the view point of the material and structure engineer, there are many aspects of failure by fatigue that are in need of attention, particularly when the size and time of the working components are changed by orders of magnitude from those considered by st traditional means. The 21 century marks an era of technology transition where structures are made larger and devices are made smaller, rendering the method of destructive testing unpractical. While health monitoring entered the field of science and engineering, the practitioners are discovering that the correlation between the signal and the location of interest depends on a priori knowledge of where failure may initiate. This information is not easy to find because the integrity of the physical system will change with time. Required is software that can self-adjust in time according to the monitored data. In this connection, effective application of health monitoring can use a predictive model of fatigue crack growth. Earlier fatigue crack growth models assumed functional dependence on the maximum stress and the size of the pre-existing crack or defect. Various possibilities were examined in the hope that the data could be grouped such that linear interpolation would apply.
Inhaltsverzeichnis
Application of Virtual Testing for Obtaining Fracture Allowable of Aerospace and Aircraft Materials. - An Equivalent Block Approach to Crack Growth. - Prediction of Fatigue Crack Growth Rates in Ti-6Al-4V Alloy. - Some Practical Implications of Exponential Crack Growth. - Fatigue Behaviour of FS, LB and MIG Welds of AA6061-T6 and AA6082-T6. - Fatigue Damage from Surface to Bulk. - Microcracking in High Temperature Low Cycle Fatigue. - Invariant Form of Micro-/Macro-Cracking in Fatigue. - Fatigue Crack Growth Rate of Cable-Stayed Portion of Runyang Bridge: Part I Cable Crack Growth Due to Disproportionate Cable Tightening/Loosening and Traffic Loading. - Fatigue Crack Growth Rate of Cable-Stayed Portion of Runyang Bridge: Part II Steel Wire Crack Growth Due to Disproportionate Cable Tightening/Loosening and Traffic Loading. - Fatigue of Small-Scale Metal Materials: From Micro- to Nano-Scale. - Assessment of Fatigue Damage in Heterogeneous Materials by Application of a Novel Compliance Technique. - Fatigue Crack Growth of Aircraft Aluminum Alloys.
