Numerical Prediction of Bearing Strength on Composite Bolted Joint Using Three Dimensional Puck Failure Criteria

Mechanical fasteners especially bolting is commonly
used in joining carbon-fiber reinforced polymer (CFRP) composite
structures due to their good joinability and easy for maintenance
characteristics. Since this approach involves with notching, a proper
progressive damage model (PDM) need to be implemented and
verified to capture existence of damages in the structure. A three
dimensional (3D) failure criteria of Puck is established to predict the
ultimate bearing failure of such joint. The failure criteria incorporated
with degradation scheme are coded based on user subroutine executed
in Abaqus. Single lap joint (SLJ) of composite bolted joint is used as
target configuration. The results revealed that the PDM adopted here
could sufficiently predict the behaviour of composite bolted joint up
to ultimate bearing failure. In addition, mesh refinement near holes
increased the accuracy of predicted strength as well as computational
effort.

Authors:

• M. S. Meon
• M. N. Rao
• K-U. Schröder

Keywords:

• Bearing strength
• bolted joint
• degradation scheme
• progressive damage model.

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