A study of dynamic pull-through failure of composite bolted joints using the stacked-shell finite element approach

作者：Pearce G M K^*; Johnson A F; Heiner A K; Thomson R S

来源：Composite Structures, 2014, 118: 86-93.

DOI：10.1016/j.compstruct.2014.07.016

• Carbon fibre composites
• Bolted joints
• Explicit finite element analysis
• Stacked-shell modelling
• Dynamic joint failure
• Pull-through

Pull-through failure of bolted joints in composites is due to the relatively low through-thickness properties of laminated materials. Recently it has been identified that pull-through failure also plays an important role in the ultimate bearing load and total energy absorption of bolted joints, especially under dynamic conditions. %26lt;br%26gt;It has been previously found that bolted joints loaded in bearing exhibit rate sensitivity whereas bolts loaded in pull-through experience very little sensitivity, for nearly identical joint configurations. The primary focus of this paper was to use explicit finite element simulation of pull-through failure to shed light on discrepancies between experimentally observed rate sensitivity for seemingly similar tests. The paper uses the stacked-shell modelling approach to efficiently model the interaction of delamination and ply failure under the complex dynamic load state. %26lt;br%26gt;The results of the simulation indicated that the properties of the interface susceptible to loading rate sensitivity, Mode I and II strain energy release rates (SERRs), did not have a great effect on the overall joint response; despite the prevalence of delamination during the failure process. A weak relationship between Mode II SERR and joint response was discovered which was consistent with experimental observations.

• 出版日期2014-12