A finite element modelling methodology for the non-linear stiffness evaluation of adhesively bonded single lap-joints: Part 2. Novel shell mesh to minimise analysis time

A new modelling methodology is presented that enables the stiffness of adhesively bonded single lap-joints to be included in the finite element analysis of whole vehicle bodies. This work was driven by the need to significantly reduce computing resources for vehicle analysis. To achieve this goal th...

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Bibliographic Details
Published in:Computers & structures 2012-01, Vol.90-91, p.89-96
Main Authors: Pearson, Ian T., Toby Mottram, J.
Format: Article
Language:English
Subjects:
Adhesive
Applied sciences
Exact sciences and technology
Finite element
Finite element method
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Joint
Mathematical analysis
Mathematical models
Mechanical engineering. Machine design
Methodology
Modelling
Physics
Shell element
Shells
Solid mechanics
Static elasticity (thermoelasticity...)
Stiffness
Structural and continuum mechanics
Vehicle body design
Vehicles
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Summary:A new modelling methodology is presented that enables the stiffness of adhesively bonded single lap-joints to be included in the finite element analysis of whole vehicle bodies. This work was driven by the need to significantly reduce computing resources for vehicle analysis. To achieve this goal the adhesive bond line and adherends are modelled by a relatively ‘small’ number of shell elements to replace the usual solid element mesh for a reliable analysis. Previous work in Part 1 has provided the necessary background information to develop and verify the new finite element analysis that reduces the solution runtime by a factor of 1000. Although a joint’s non-linear stiffness is reliably simulated to failure load, it is recognised by the authors that the coarse shell mesh cannot provide accurate peak stresses or peak strains for the successful application of a numerical failure criterion. Given that the new modelling methodology is very quick to apply to existing shell models of vehicle bodies, it is recommended for use by the stress analyst who requires, say at the preliminary design stage, whole vehicle stiffness performance in a significantly reduced timeframe.
ISSN:0045-7949
1879-2243
DOI:10.1016/j.compstruc.2011.10.006