Bonded Joints and Repairs to Composite Airframe Structures.

Front Cover -- Bonded Joints and Repairs to Composite Airframe Structures -- Copyright -- Contents -- Preface -- References -- 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 -- 2.3.1.1. Maximum stress or strain failure criteria -- 2.3.1.2. Tsai-Hill and Tsai-Wu failure criteria -- 2.3.1.3. Hashin failure criteria -- 2.3.1.4. Larc03 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 -- 3.2.1.1. Elastic Analysis for Adhesive Shear -- 3.2.1.2. Elastic-Plastic Analysis for Adhesive Shear -- 3.2.1.3. Uncoupled Analysis of Adhesive Peel -- 3.2.2. One-Sided Doublers and Single Strap Joints -- 3.3. Tapered doublers and joints -- 3.3.1. Solution for Nonlinear Moment Distribution Along the Joint -- 3.3.2. Elastic Solution for Adhesive Peel and Shear -- 3.3.2.1. Multisegment Method of Integration -- 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 joint -- 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 -- 4.5. Doubler-scarf joints -- 4.6. 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 -- 5.2.2.1. Davidson's crack tip element approach -- 5.2.2.2. Wang and Qiao crack tip element approach -- 5.2.3. Cohesive Zone Model -- 5.2.3.1. 1D cohesive zone model -- 5.2.3.2. 2D 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 -- 6.5.2.1. Average stress criterion -- 6.5.2.2. Linear elastic fracture mechanics -- 6.5.2.3. VCCT method -- 6.5.2.4. Cohesive zone model -- 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 -- 7.2.3.1. Stage I analysis -- 7.2.3.2. Stage II analysis -- 7.2.3.3. Results for a special case of isotropic patch and isotropic skin with the same Poisson's ratio -- 7.2.3.4. Numerical examples -- 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-like 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 -- 7.4.1.1. Design criteria for damaged skin plate -- 7.4.1.2. Design criteria for patch -- 7.4.1.3. Design criteria for adhesive -- 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 quality -- 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 -- Back Cover.

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Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2024. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.