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Bolted Joints in Composites Structures Design Guide

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Bolted Joints in Composites Structures Design Guide

This design guide was prepared under Contract, titled "Bolted Joints in Composite Structures: Design, Analysis and Verification," and administered by the Air Force Wright Aeronautical Laboratories.

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INTRODUCTION
1.1 Scope of the Design Guide
1.2 Sample Joint Configurations
1.3 Overview of Design Methodology
1.4 Analytical Requirements
1.5 Test Requirements
1.6 Current Restrictions

GENERAL DESIGN GUIDELINES AND JOINT VARIABLES
2.1 Joint Location in the Structure
2.2 Joint Configurations
2. 3 Joint Loading
2.3.1 Joint Loads at the Structural Level
2.3.2 Load Distribution Among Rove of Fasteners
2.3.3 Bearing and By-Pass Loads at an Isolated Fastener Location
2.4 Failure Modes in Bolted Laminates
2.5 Fastener Type, Material and Installation Variables
2.5.1 Fast nor Type
2.5.2 Fastener material
2.5.3 Fastener Size
2.5.4 Fastener Fit and Hole Quality
2.5.5 Fastener Torque-up
2.6 Bolted Laminate Properties
2.7 Fastener Spacing and Arrangement
2.8 Joint Tailoring for Maximum Efficiency
2.9 Durability Considerations

STRENGTH ANALYSIS OF BOLTLD COPOSITZ STRUCTURES
3.1 Description of SASCT Analysis
3.1.1 Strength Analysis Procedure for Fully-Loaded Holes
3.1.2 Strength Analysis Procedure for Partially-Loaded Holes
3.1.3 Inplane Failure Criteria
3.1.4 Interlaminar Failure Criterion
3.2 SASCJ Input Description
3.3 SASC Output Description
3.4 Description of SAMCJ Analysis
3.5 SAICJ Input description
3.6 S'.CJ Output Description
4 DESIGN VERIFICATION OF A BOLTED STRUCTURAL ML
4.1 Description of the Bolted Structural Element
4.2 Test Results
4.3 Design Verification of the Element Using SAMCJ
5 CONCLUSIONS
REFERENCES
Appendix A - SASCJ Program Listing
Appendix B - SAHCJ Program Listing