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FEM analysis of stresses in adhesive single-lap joints with non-linear materials under thermo-mechanical loading
Luleå University of Technology, Sweden; Middle Technical University, Iraq.
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, SICOMP. Luleå University of Technology, Sweden.ORCID iD: 0000-0002-5210-4341
Luleå University of Technology, Sweden.
2018 (English)In: ECCM 2018 - 18th European Conference on Composite Materials, Applied Mechanics Laboratory , 2018Conference paper, Published paper (Refereed)
Abstract [en]

This study presents comprehensive numerical stress analysis in the adhesive layer of a single-lap joint subjected to various loading scenarios (mechanical and thermal loading). For this purpose numerical model (finite element method) with novel displacement coupling conditions able to correctly represent monoclinic materials (off-axis layers of composite laminates) has been developed. This model includes nonlinear material model and geometrical nonlinearity is also accounted for. The effect of thermal residual stresses (in adhesive) is analysed for various methods of manufacturing of single lap joint. The sequences of application of thermal and mechanical loads for the analysis of the thermal residual stresses in joints are proposed. It is shown that the most common approach used in many studies of linear superposition of thermal and mechanical stresses works well only for linear materials and produces wrong results if material is non-linear. The present study demonstrates suitable method to apply combined thermal and mechanical loads to get accurate stress distributions. Based on the analysis of these stress distributions the conclusions concerning the effect of the thermal residual stresses on peel and shear stress concentrations are made. The comparison between effect of thermal stresses in case of the one-step and two-step joint manufacturing techniques is made

Place, publisher, year, edition, pages
Applied Mechanics Laboratory , 2018.
Keywords [en]
Adhesive joining, Numerical stress analysis, Residual thermal stresses, Single-lap joint, Thermo-mechanical load
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-43462Scopus ID: 2-s2.0-85067807576ISBN: 9781510896932 (print)OAI: oai:DiVA.org:ri-43462DiVA, id: diva2:1390088
Conference
18th European Conference on Composite Materials, ECCM 2018, 24 June 2018 through 28 June 2018
Note

Funding text 1: The work was financially supported by Middle Technical University (Iraq), by Goup of Polymeric Composite Materials at LTU (Sweden) and by Vinnova funded LIGHTer programme (Sweden).

Available from: 2020-01-31 Created: 2020-01-31 Last updated: 2020-01-31Bibliographically approved

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