Characterization of Bolted Joint Behavior: MIL-HDBK-17 Accomplishments at Standardization

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Abstract

A testing approach is presented that will provide the user with sufficient data to design bolted joints in composite structures against various failure modes and interactions between them. Test methods for characterizing bolted joint behavior are described. These include double- and single-shear bearing, notched tension and compression, bearing/bypass (tension and compression), shear-out, and fastener pull-through. In addition to test specimens and procedures, test matrices are presented that recommend laminates to be tested, environmental conditions, and replication. The replications represent the minimum data requirements to design bolted joints in composite structures given today's analytic capability. The test methods and testing requirements were established through a working group consensus and approved by the full committee of MIL-HDBK-17.

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