Structural Health Monitoring Damage Detection Systems for Aerospace.

• Superior document: Springer Aerospace Technology
• Author: Sause, Markus G. R.
• TeilnehmendeR: Jasiūnienė, Elena.
• Year of Publication: 2021
• Language: English
• Series: Springer Aerospace Technology
• Physical Description: 1 online resource (292 p.)
• Notes: Description based upon print version of record.

This open access book presents established methods of structural health monitoring (SHM) and discusses their technological merit in the current aerospace environment. While the aerospace industry aims for weight reduction to improve fuel efficiency, reduce environmental impact, and to decrease maintenance time and operating costs, aircraft structures are often designed and built heavier than required in order to accommodate unpredictable failure. A way to overcome this approach is the use of SHM systems to detect the presence of defects. This book covers all major contemporary aerospace-relevant SHM methods, from the basics of each method to the various defect types that SHM is required to detect to discussion of signal processing developments alongside considerations of aerospace safety requirements. It will be of interest to professionals in industry and academic researchers alike, as well as engineering students. This article/publication is based upon work from COST Action CA18203 (ODIN - http://odin-cost.com/), supported by COST (European Cooperation in Science and Technology). COST (European Cooperation in Science and Technology) is a funding agency for research and innovation networks. Our Actions help connect research initiatives across Europe and enable scientists to grow their ideas by sharing them with their peers. This boosts their research, career and innovation.

Table of Contents

Intro -- Preface -- Acknowledgment -- Contents -- Contributors -- Chapter 1: Introduction -- Chapter 2: Monitoring Tasks in Aerospace -- 2.1 Condition Monitoring -- 2.2 Operation Monitoring (OM) -- 2.3 Damage Monitoring (DM) -- 2.4 Challenges -- References -- Chapter 3: Defect Types -- 3.1 Metallic Materials -- 3.1.1 Defects During the Manufacturing Process -- 3.1.2 Defects During In-service Conditions -- 3.1.2.1 Fatigue -- 3.1.2.2 Corrosion -- 3.1.2.3 Creep -- 3.1.2.4 Operational Overload -- 3.1.2.5 Wear -- 3.1.2.6 Extreme Weather Conditions -- 3.1.2.7 Miscellaneous Defect Types in Metals

3.2 Composite Materials -- 3.2.1 Disbonds -- 3.2.2 Delamination -- 3.2.3 Foreign Inclusion -- 3.2.4 Matrix Cracking -- 3.2.5 Porosity -- 3.2.6 Fibre Breakage -- 3.2.7 Other Composite Laminate Typical Defects -- 3.2.8 Typical Honeycomb Core Defects -- 3.2.9 Typical Foam Core Defects -- 3.2.10 Ingress of Moisture and Temperature -- 3.2.11 Fatigue -- 3.3 Defects in Coatings -- 3.3.1 Defects During the Manufacturing Process -- 3.3.2 Defects During In-service Conditions -- 3.4 Defects in Joints -- 3.4.1 Adhesively Bonded Joints -- 3.4.2 Friction Stir-Welded Joints -- 3.5 Concluding Remarks

References -- Chapter 4: Aerospace Requirements -- 4.1 Power Consumption -- 4.2 System Reliability/Durability -- 4.3 Effect of Operational Conditions -- 4.4 Size/Weight Restrictions -- 4.5 Optimal Sensor Placement -- 4.6 Summary -- References -- Chapter 5: Ultrasonic Methods -- 5.1 Introduction to Ultrasonic Inspection -- 5.2 Ultrasonic Guided Wave (GW) Inspection -- 5.2.1 Governing Equations of GW Wave Propagation -- 5.2.1.1 Waves in Unbounded Media -- 5.2.1.2 Boundary Conditions -- 5.2.1.3 Dispersion Relation -- 5.2.2 Active and Passive Guided Wave Inspection -- 5.2.3 Dispersion and Attenuation

5.2.4 Guided Wave Excitation and Mode Selection -- 5.3 Defect Detection -- 5.3.1 Defect Localisation and Imaging: Sparse, Phased Arrays and Guided Wave Tomography -- 5.3.2 Guided Wave Interaction with Actual Structural Defect -- 5.4 Reliability of SHM Systems -- 5.4.1 Basic Concepts of POD and PFA -- 5.4.2 Sources of Variability of SHM System -- 5.4.3 Analysis of Environmental and Operational Conditions -- 5.4.4 POD Assessment Solutions -- 5.4.5 Model-Assisted POD for SHM System -- 5.5 Guided Wave Applications to SHM of Aerospace Components -- 5.6 Summary -- References

Chapter 6: Vibration Response-Based Damage Detection -- 6.1 Introduction -- 6.2 The Rationale of Vibration-Based Methods -- 6.3 Environmental and Operational Influences -- 6.4 Modal-Based Methods and Damage Features -- 6.4.1 Natural Frequencies -- 6.4.2 Mode Shapes -- 6.4.3 Modal Slope -- 6.4.4 Modal Curvature -- 6.4.5 Strain Energy -- 6.4.6 Damping -- 6.4.7 Interpolation Error -- 6.5 Time Series Methods -- 6.5.1 Autoregressive Parameters -- 6.5.2 Intrinsic Mode Function and Hilbert Spectrum -- 6.5.3 Signal Components -- 6.5.4 Damage Indices Based on Extracted Features

6.5.5 Singular Spectrum Analysis (SSA)