Failure load Prediction of Single and Multi-Bolted Composite Joints: Similar and Dissimilar Material Combinations
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Failure load prediction for single and multi-bolted composite joints with similar and dissimilar materials was conducted through experiments and FEA. When stress concentrations at the bolt hole edge were treated as the final failure, the FEA predictions tended to underestimate the experimental results. To address this discrepancy, the characteristic length method [1] was employed. The characteristic length was determined using both an experimental method and a test-free method [2], and the resulting characteristic curves were used to predict the failure load for four cases with different bolt arrangements. To investigate the effects of design parameters on joint failure load, the w/d and e/d ratios, bolt number and arrangement, bolt spacing, clamping torque, and friction coefficient were selected as variables, and their influences on the characteristic length and the failure load were analyzed. Overall, this study provides a reliable basis for selecting design parameters and offers practical guidance for designing reliable bolted composite joints.
