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Joining of Advanced Composites Engineering Design Handbook

Engineering Materials

Joining of Advanced Composites, Engineering Design Handbook
Andrew Devine, Plastics Evaluation Center - 1979
146 pages

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Preface

This handbook should serve as a guide to designers concerned with the technology associated with the joining of advanced composites. It deals with basic joint design practice as well as with those practices specific to composite joining. Tabulated and graphical representations of joint property data obtained on both bonded and mechanically fastened composites are presented. These data can be used by designers to test the degree of conservatism in calculated joint properties for their composite joint designs and hopefully will impart the necessary degree of confidence or wariness in the early design stages where alterations can be made most economically.

It is hoped that the diversity of joint possibilities and the magnitude of the joint strength properties reported will prompt cautious designers of Army materiel to make use of the strength-to-weight advantages offered by advanced composites and also to recognize that the technology is available for practical implementation of these valuable engineering materials.

TOC

CHAPTER l. INTRODUCTION
List of Symbols
Advanced Composites Defined
Preliminary Comments on Joint Design
Mechanical vs Adhesive Bonded Joints
General
Mechanical joints
Adhesive Bonded joints
Basic Joint Design
General
Important Bonded Joint Properties
Important Laminate and Adhesive Properties
Advanced Component Joint Considerations
Surface Preparation of Advanced Composites Prior to Bonding

CHAPTER 2. COMPOSITE JOINT DESIGN
List of Symbols
Design Philosophy
Bonded joint Analysis and Design
Bolted Joint Analysis and Design
Fiber Orientation
References

CHAPTER 3. DESIGN DATA REQUIREMENTS
List of Symbols
Baseline Data
Laminate Mechanical Properties
Mechanical Properties of Adhesives4
Design Data Generation
Composite Mechanical Property Tests
Tension Properties
Compression Properties
Interlaminar Shear Properties (In-Plane Shear)
Interlaminar Shear Properties .
Flexural Properties of Laminates.
Bearing Stress of Laminates
Test Specimen Schematics and Data Reduction Equations
Summary.
References .

CHAPTER 4.
BASIC BONDED AND BOLTED LAP JOINT CONFIGURATIONS AND DESIGN VARIATIONS
List of Symbols .
General
Bonded Joints
Bonded Single-Lap Joints.
Bonded Double-Lap Joints .
Bonded Scarf Joints
Stepped Lap Joints
Bonded Joint Performance Compared
Fiber Orientation vs Joint Strength-In-Bonded Joints
Bolted Composite Joints
Single- and Double-Lap Bolted Joints
Plain Holes
Bushed Holes
Bolted Joints With Reinforced Edges
Bolted and Bonded Joints
Reducing Stress Concentrations in Joints
Model
Strap Modifications
Increased Adhesive Thickness
Influence of Strap and Adhesive Alterations on Joint Efficiency.
Variable Adhesive Stiffness.
Typical Bolted Joint Configurations
Bolted Failure Modes
Typical Bonded Joint Configurations .
Bonded Failure Modes
Weight of Joints
Fatigue
Bonded Joints
Bolted joints and Bolted-Bonded joints
References

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