CUED Publications database

Numerical investigation of bio-inspired tubular composite to steel joints

Avgoulas, EI and Sutcliffe, MPF (2016) Numerical investigation of bio-inspired tubular composite to steel joints. In: UNSPECIFIED.

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© 2016, European Conference on Composite Materials, ECCM. All rights reserved.In many high-performance applications there is a need to join tubular steel and composite parts. Bonded joints between dissimilar tubular members under axial tension develop relatively high stresses with steep gradients localised at the joint ends. This is due to the large stiffness mismatch between the materials of the adherends. This paper uses the biomimetics approach to help develop solutions to this problem. One of the key methods that nature uses to join dissimilar materials is a transitional zone of stiffness at the insertion site. This method was used to propose bio-inspired solutions with a transitional zone of stiffness at the joint site for tubular CFRP-to-steel and GFRP-to-steel adhesively bonded joint configurations. The transition zone was used to reduce the material stiffness mismatch of the joint parts. Two-dimensional axisymmetric finite-element models of tubular CFRP-to-steel and GFRP-to-steel joints were developed. A cohesive zone degradation formulation was chosen to calculate accurately the load carrying capacity of the adhesive joints. The model was used to identify the optimum variation in material stiffness which minimises potential failure of the joint. The best bio-inspired CFRP-to-steel and GFRP-to-steel joints showed a 10% and 30% increase of joint strength comparing to the non-bioinspired ones.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div C > Materials Engineering
Div C > Biomechanics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:58
Last Modified: 07 Aug 2018 03:41