
Proceedings Paper
Biomimetic-inspired joining of composite with metal structures: A survey of natural joints and application to single lap jointsFormat | Member Price | Non-Member Price |
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Paper Abstract
Joining composites with metal parts leads, inevitably, to high stress concentrations because of the material property
mismatch. Since joining composite to metal is required in many high performance structures, there is a need to develop a
new multifunctional approach to meet this challenge. This paper uses the biomimetics approach to help develop solutions
to this problem. Nature has found many ingenious ways of joining dissimilar materials and making robust attachments,
alleviating potential stress concentrations. A literature survey of natural joint systems has been carried out, identifying
and analysing different natural joint methods from a mechanical perspective. A taxonomy table was developed based on
the different methods/functions that nature successfully uses to attach dissimilar tissues (materials). This table is used to
understand common themes or approaches used in nature for different joint configurations and functionalities.
One of the key characteristics that nature uses to joint dissimilar materials is a transitional zone of stiffness in the
insertion site. Several biomimetic-inspired metal-to-composite (steel-to-CFRP), adhesively bonded, Single Lap Joints
(SLJs) were numerically investigated using a finite element analysis. The proposed solutions offer a transitional zone of
stiffness of one joint part to reduce the material stiffness mismatch at the joint. An optimisation procedure was used to
identify the variation in material stiffness which minimises potential failure of the joint. It was found that the proposed
biomimetic SLJs reduce the asymmetry of the stress distribution along the adhesive area.
Paper Details
Date Published: 8 March 2014
PDF: 16 pages
Proc. SPIE 9055, Bioinspiration, Biomimetics, and Bioreplication 2014, 90550N (8 March 2014); doi: 10.1117/12.2048277
Published in SPIE Proceedings Vol. 9055:
Bioinspiration, Biomimetics, and Bioreplication 2014
Akhlesh Lakhtakia, Editor(s)
PDF: 16 pages
Proc. SPIE 9055, Bioinspiration, Biomimetics, and Bioreplication 2014, 90550N (8 March 2014); doi: 10.1117/12.2048277
Show Author Affiliations
Evangelos Ioannis Avgoulas, Univ. of Cambridge (United Kingdom)
Michael P. F. Sutcliffe, Univ. of Cambridge (United Kingdom)
Published in SPIE Proceedings Vol. 9055:
Bioinspiration, Biomimetics, and Bioreplication 2014
Akhlesh Lakhtakia, Editor(s)
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