Abstract
Multibolt composite joints are widely used in aircraft structures. The determination of the pin-load distribution among the bolts is a critical step in the failure prediction of bolted joints. In this paper, a two-dimensional model of the multibolt composite structure is established for the pin-load distribution analysis. Its accuracy is validated by experimental results and the results from a 3D finite element model. Based on the determined pin-load distribution, FE models for a laminated plate with three-row fastener joints are built for failure prediction. Hashin stress criteria and the degradation guidelines of the material stiffness with respect to the different failure modes proposed by Tserpes are applied for the failure evaluation and the material degradation, respectively. The failure location and ultimate load are well predicted, which further validates the effectiveness and applicability of the proposed model for the pin-load distribution analysis.
Highlights
The pin load distribution was calculated according to the voltage–load relationship of the load sensor
The pin-load distribution ratio computed by the analytical method is listed in Table
The determination the pin-load distribution ratio is the premise of a failure analysis
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The pin-load distribution is important for the failure prediction of composite bolted joints It has been investigated in many studies by experiments or 3D finite element models. In order to reduce the complexity of the procedure and save computing time, it is necessary to propose a simple analysis model, which can accurately determine the pin-load distribution ratio of fasteners and improve the effiandof save ciency thecomputing analysis. Thecost mainfor object this work is toofpropose a simple and efficientratio model low joints and computing provide a more convenientofapproach fordistribution the designratio of composite cost for the determination the pin-load in multibolt bolted joints structures.
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