: Sérgio M. O. Tavares, Paulo M. S. T. de Castro
: Damage Tolerance of Metallic Aircraft Structures Materials and Numerical Modelling
: Springer-Verlag
: 9783319701905
: 1
: CHF 56.90
:
: Luft- und Raumfahrttechnik
: English
: 117
: Wasserzeichen/DRM
: PC/MAC/eReader/Tablet
: PDF

This book provides a state-of-the-art review of the fail-safe and damage tolerance approaches, allowing weight savings and increasing aircraft reliability and structural integrity.

The application of the damage tolerance approach requires extensive know-how of the fatigue and fracture properties, corrosion strength, potential failure modes and non-destructive inspection techniques, particularly minimum detectable defect and inspection intervals. In parallel, engineering practice involving damage tolerance requires numerical techniques for stress analysis of cracked structures. These evolved from basic mode I evaluations using rough finite element approaches, to current 3D modeling based on energetic approaches as the VCCT, or simulation of joining processes. This book provides a concise introduction to this subject.



Sergio Tavares got his doctorate at the Universidade do Porto in 2011, in the frame of the MIT-Portugal programme; his thesis and subsequent R&D work concern integral structures. Paulo de Castro got his PhD at Cranfield Institute of Technology in 1980, and has since worked in fracture and fatigue problems, through a variety of R&D projects as EU SMAAC, ADMIRE and DATON, Al-Li work for ESA, among others.


Preface6
Contents9
Acronyms and Symbols11
Part I Damage Tolerance of Aircraft Structures16
1 Introduction17
1.1 Evolution of Fatigue Design Approaches17
1.2 Cracks and Damage23
References28
2 Maintenance31
References35
3 Fatigue Crack Growth37
3.1 Life Estimation and Scatter37
3.2 Improvement of Fatigue Strength39
References40
4 Materials42
4.1 Introductory Remarks42
4.2 Aluminium-Lithium44
4.3 Titanium44
4.4 Fibre Metal Laminates FMLs45
4.5 Polymeric Composites46
References52
5 Widespread Fatigue Damage and Limit of Validity56
5.1 Evolution of Regulations56
5.2 A Glance into Technical Aspects61
5.2.1 Structural Analyses61
5.2.2 Integral Structures Crenellations
5.2.3 Morphing65
References65
Part II Design of Monolithic Aeronautical Structures69
6 Alloys and Fatigue Crack Propagation70
References75
7 Residual Stress78
7.1 Introduction and Experimental Measurement78
7.2 Welding and Numerical Modelling82
7.2.1 Introduction82
7.2.2 Case Study: Laser Beam Welded Butt Joints of Thin Al Alloy Plates87
7.2.3 Case Study: T-Joint92
References98
8 Fatigue Crack Propagation of a Structural Detail102
8.1 Introduction102
8.2 Fatigue Crack Growth Laws103
8.2.1 Parameters for the Crack Growth Laws105
8.2.2 Consideration of Residual Stress Effects107
8.3 Finite Element Modelling110
8.3.1 Discussion and Conclusions112
References112
Index114