Numerical analysis of thermal stresses around fasteners in composite metal foils

Nammi, Sathish and Butt, Javaid and Mauricette, Jean-luc and Shirvani, Hassan (2017) Numerical analysis of thermal stresses around fasteners in composite metal foils. In: 3rd International Conference on Mechanical Engineering and Automation Science (ICMEAS 2017), 13-15 October 2017, University of Birmingham, UK.

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The process of composite metal foil manufacturing (CMFM) has reduced a number of limitations associated with commercial additive manufacturing (AM) methods. The existing metal AM machines are restricted by their build envelope and there is a growing market for the manufacture of large parts using AM. These parts are subsequently manufactured in fragments and are fastened together. This paper analyses the thermal stresses around cylindrical fasteners for three layered metal composite parts consisting of aluminium foil, brazing paste and copper foil layers. The investigation aims to examine the mechanical integrity of the metallurgically bonded aluminium/copper foils of 100 micron thickness manufactured in a disc shape. A cylindrical fastener set at an elevated temperature of 100 °C is fitted in the middle of the disc which results in a steady-state thermal distribution. Radial and shear stresses are computed using finite element method which shows that non-zero shear stresses developed by the copper layer inhibit the axial slippage of the fastener and thereby establishing the suitability of rivet joints for CMFM parts.

Item Type: Conference or Workshop Item (Paper)
Keywords: thermal stresses, fasteners, composite metal foils
Faculty: ARCHIVED Faculty of Science & Technology (until September 2018)
Depositing User: Ian Walker
Date Deposited: 08 Dec 2017 14:15
Last Modified: 09 Sep 2021 18:57

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