Bonded Joints and Repairs to Composite Airframe Structures.

Format:

Book

Author/Creator:

Wang, Chun Hui.

Contributor:

Duong, Cong N.

Language:

English

Subjects (All):

Fibrous composites.

Airframes--Design and construction.

Airframes.

Physical Description:

1 online resource (0 p.)

Edition:

1st ed.

Place of Publication:

Saint Louis : Elsevier Science, 2015.

London : Academic Press is an imprint of Elsevier, [2016]

Summary:

Covering analysis of both internal and external joints and repairs, as well as damage tolerance, non-destructive inspection and self-healing repairs, this book provides essential information on the joints and repairs themselves but, critically, on how they differ from bonds and repairs to metallic aircraft.

Contents:

Preface ; Part 1. Analysis and design. Chapter 1. Introduction and overview ; 1.1. Aim of book ; 1.2. Criticality of structure and damage ; 1.3. Types of composite repairs and certification criteria ; 1.4. Overview of repair design and analysis process ; 1.5. Effect of load attraction in patch design ; 1.6. Effect of taper and scarf ratios on joint design ; 1.6.1. Safe-life approach ; 1.6.2. Damage tolerance approach ; 1.6.3. Stepped repairs ; 1.7. Summary ; References ; Chapter 2. Failure criteria ; 2.1. Introduction ; 2.2. Adhesive failure criteria ; 2.2.1. Failure criteria for brittle adhesives ; 2.2.2. Failure criteria for ductile adhesives ; 2.3. Composite failure criteria ; 2.3.1. Intralamina failure criteria ; 2.3.2. Interlaminar failure criteria ; 2.4. Summary ; References ; Chapter 3. Doubler joint analysis ; 3.1. Introduction ; 3.2. Untapered doublers and joints ; 3.2.1. Two-sided doublers and double strap joints ; 3.2.2. Elastic solution for adhesive peel and shear ; 3.3.3. Elastic-plastic solution for adhesive peel and shear ; 3.3.4. Effect of adherent shear deformation ; 3.3.5. Numerical examples ; 3.4. Summary ; References ; Chapter 4. Design of scarf and doubler-scarf joints ; 4.1. Introduction ; 4.2. Scarf joint of homogeneous adherends ; 4.2.1. Constant-angle scarf ; 4.2.2. Optimum angle of scarf between dissimilar materials 4.3. Composite scarf joints ; 4.3.1. Identical adherends with constant-angle scarf ; 4.3.2. Elasto-plastic stress analysis of scarf joints ; 4.4. Experiments and validation ; 4.4.1. Room temperature dry condition ; 4.4.2. Hot wet condition ; Doubler-scarf joints ; Conclusions ; References ; Chapter 5. Disbond and damage tolerance analysis of doubler repairs ; 5.1. Introduction ; 5.2. Analytical methods for delamination analysis ; 5.2.1. VCCT by FE method ; 5.2.2. Crack tip element approach ; 5.2.3. Cohesive zone model ; 5.3. Analytical methods for disbond analysis ; 5.4. Fatigue damage accumulation model for predicting interlaminar failure and disbond ; 5.5. Summary ; References ; Chapter 6. Damage tolerance and fatigue durability of scarf joints ; 6.1. Introduction ; 6.2. Impact damage of scarf joints and repairs ; 6.3. Effects of disbond on joint strength ; 6.4. Design methods ; 6.4.1. Average stress ; 6.4.2. Linear elastic fracture mechanics ; 6.4.3. Virtual crack closure technique (VCCT) ; 6.4.4. Cohesive zone model (CZM) ; 6.5. Verifications ; 6.5.1. Finite element model (FEM) ; 6.5.2. Strength prediction of scarf joints ; 6.6. Fatigue disbond growth life ; 6.6.1. Method ; 6.6.2. Experimental validation ; 6.6.3. Comparison between analysis and experiments ; 6.7. Discussion ; 6.8. Summary ; References ; Chapter 7. Design and analysis of doubler repairs ; 7.1. Introduction ; 7.2. Repair analysis for elliptical damages ; 7.2.1. Elastic solution for an elliptical hole in an anisotropic plate ; 7.2.2. Elastic solution for an elliptical inhomogeneity in a 2D anisotropic plate ; 7.2.3. Two-stage analysis procedure for determining load attraction and stress concentration ; 7.2.4. Strength assessment for an after repair damaged skin laminate ; 7.2.5. Bond line analysis by bonded joint or bonded doubler methods ; 7.3. Repair analysis for crack-line damages ; 7.3.1. Wang and Rose's crack bridging model ; 7.3.2. Two-stage analysis procedure for crack patching ; 7.4. Patch design for an elliptical damage ; 7.4.1. Design criteria and guidelines ; 7.4.2. Patch design algorithm 7.5. Summary ; References ; Chapter 8. Design and optimization of scarf repairs ; 8.1. Introduction ; 8.2. Residual strength of scarfed laminates ; 8.2.1. Tension and compression loading ; 8.2.2. Predictive modeling ; 8.3. Shape optimization of scarf repairs ; 8.3.1. Assessment of existing shaping methods 8.3.2. Optimum solution ; 8.3.3. Case studies ; 8.4. Structural doublers ; References

Part 2. Manufacturing and inspection. Chapter 9. Repair manufacturing processes ; 9.1. Introduction ; 9.2. Scarfing operation ; 9.3. Repair patch manufacturing ; 9.3.1. Soft patch ; 9.3.2. Molded patch ; 9.4. Surface treatment ; 9.5. Adhesive bonding ; 9.6. Repair of thick laminates ; References ; Chapter 10. Non-destructive evaluation of bond ; 10.1. Introduction ; 10.2. Detection of disbonds ; 10.3. Detection of weak adhesion bonds ; 10.4. Local bond proof testing ; 10.5. Satellite coupon proof test ; References ; Index.

Notes:

Description based upon print version of record.

Includes bibliographical references and index.

ISBN:

9780124171725

0124171729

9780124171534

0124171532