Abstract
The effect of joining by extrusion welding on the tensional stiffness and strength of a Polypropylene copolymer was analysed. Short-term and creep tests with laboratory specimens were conducted. Welded joint sub-components were simulated with the finite element method and the results were validated by experiments.
Highlights
Extrusion welding is a joining technology suitable for manufacturing of large and complex polymeric structures
Welded joint sub-components were simulated with the finite element method and the results were validated by experiments
Possible implication to the joint geometry was determined by analysing stiffness and strength of subcomponents based on Finite Element Method (FEM) simulations combined with experimental tests
Summary
Extrusion welding is a joining technology suitable for manufacturing of large and complex polymeric structures. Filler material is plasticised by a small extruder and the welding partners are pre-heated locally to soften the parent material in the joining area. The molten filler is deposited in the weld gap between the joining partners. Consolidation and solidification of the melt gives the joint its strength. This technology is well established in the industry but there is hardly any information available about the impacts of this process on the material properties and the mechanical behaviour of welded components. Possible implication to the joint geometry was determined by analysing stiffness and strength of subcomponents based on Finite Element Method (FEM) simulations combined with experimental tests
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